【Objective】To clarify the effects of nitrogen fertilization operation on maize yield and nitrogen utilization efficiency under drip irrigation in Tumochuan plain of Inner Mongolia,and explore the feasibility of using the nitrogen nutrient index as monitoring index to diagnose the nitrogen nutrient status of maize under drip irrigation with water and fertilization integration in Tumochuan plain.【Methods】The nitrogen nutrient content of mazie under 3 nitrogen fertilization rates（0,270,360 kg/hm²）and 3 and 5 nitrogen fertilization rates during the whole growth period were tested in Tumed Right Banner of Baotou City and Tumed Left Banner of Hohhot City in Inner Mongolia from 2022 to 2023. The yield and nitrogen utilization efficiency of maize were studied by using variance analysis and statistical modeling. The changes of canopy nitrogen concentration and aboveground biomass were analyzed and construct a critical nitrogen concentration dilution curve model.【Results】Increasing the rate and times of nitrogen application could significantly increase ear number,grain number per ear and 1 000-grain weight of maize,thus increasing yield. In addition,increasing nitrogen application times could significantly improve nitrogen utilization efficiency of maize（P<0.05）. Nitrogen application rate increased from 270 kg/hm² to 360 kg/hm²,and the average annual yield increased by 5.79%. Nitrogen application times increased from 3 times to 5 times,and the average annual yield and nitrogen utilization efficiency increased by 3.15% and 22.25%,respectively. The critical nitrogen concentration dilution curve of maize for drip irrigation in Tumochuan plain is N_c=3.36W^-0.22,R²=0.94,P<0.05,and the validation accuracy RMSE,NRMSE and MAE were 0.40%,11.50% and 0.20%,respectively. The stability of the model was good.According to the model calculation,when the nitrogen application rate was 270 kg/hm²,the corresponding suitable nitrogen application times were 5 times,and the ratio of 15∶25∶35∶15∶10 was applied at 4 leaf extension stage,8 leaf extension stage,12 leaf extension stage,silking stage and milking stage,respectively,the mazie yield was the best,was 14.09 t/hm². In this area,the nitrogen fertilization requirements at jointing stage,9 leaf extension stage,12 leaf extension stage,silking stage and milking stage were -3.42 to 15.29,-16.80 to 22.90,-26.86 to 62.32 and -54.65 to 85.14 and -48.18 to 111.80 kg/hm².【Conclusion】Appropriate increase of nitrogen application rate and nitrogen application times can significantly improve maize yield and nitrogen utilization efficiency in Tumochuan plain of Inner Mongolia. The critical nitrogen concentration dilution curve model of maize under drip irrigation in Tumochuan plain of Inner Mongolia can effectively identify the nitrogen nutrient status of maize plants from the jointing stage to the milking stage and calculate and recommend the appropriate fertilization application rate,so as to realize the on-demand operation of maize growth.

【Objective】To explore a soybean-maize intercropping pattern suitable for the ecological conditions in the cold and arid regions of northeast China.【Methods】 A one-way random block design was used to set up six treatments： 2∶2 pattern （BO-S2∶M2）,4∶4 pattern（BO-S4∶M4）,4∶2 pattern（BO-S4∶M2） and 6∶4 pattern（BO-S6∶M4） of soybean-maize row ratio before optimization,and 6∶2 mode（AO-S2∶M2） and 4∶4 mode（AO-S4∶M4） after optimization,monoculture corn,monoculture soybeanwere used as control. The fertility process of each intercropping pattern land equivalent ratio,net effect,compensating effect,selection effect and economic benefits were analyzed.【Results】 Compare with monocropping soybean under intercropping patterns,the growth period of soybean was delayed by 2-3 days compared with that of monoculture soybean. The land equivalent ratio of each intercropping mode was greater than 1,and the crop yield increased by 13%-36% compared with monoculture. The net effect of AO-S2∶M2 pattern was 317.04 kg/hm²,which was significantly higher than that of other patterns（P<0.05）. Among the intercropping patterns,the AO-S2∶M2 pattern had the largest compensating effect,which was significantly higher than that of the BO-S2∶M2 pattern（P<0.05）. Compared with the pre-optimization period,the AO-S2∶M2 pattern selection effect increased by 46.90%. Compared with monoculture maize,AO-S2∶M2 and AO-S4∶M4 increased by 38.16 and 9.33 yuan/hm²,respectively. Compared with monoculture soybean,all intercropping patterns showed an increase of 53.39-379.74 yuan/hm². Principal component analysis（PCA） showed that the AO-S2∶M2 pattern had the highest comprehensive score of 2.11,followed by the AO-S4∶M4 pattern（0.62）.【Conclusion】 The advantages of 2∶2 and 4∶4 intercropping patterns of soybean-maize after optimization of planting technology are prominent,and the intercropping mode of soybean-maize after optimization has the greatest advantage over the 2∶2 intercropping mode,which has more promotion value in cold and arid region of northeast China.

【Objective】To screen the suitable maize planting density and varieties in Hetao irrigation district of Inner Mongolia,and provide reference for the improvement of maize yield per unit area based on this.【Methods】The experiment was carried out in Bayannur City,Inner Mongolia from 2022 to 2023. A two-factor randomized block design was adopted,and the main treatment was plant density（D1：90 000 plants/hm²,D2：97 500 plants/hm²,D3：105 000 plants/hm²,D4：112 500 plants/hm²,D5：120 000 plants/hm²）,and varieties were sub-treated（Sitai 112,Lilong 170,Mingyu 268,Jinyuan 118）. The effects of different densities on agronomic traits,yield components and yield of each maize variety were analyzed,and their economic benefits were calculated.【Results】At 5 densities,the reproductive growth of Sitai 112 was 3 days earlier than that of other varieties. At D3 density,Mingyu 268 plant height and ear height both were the highest,which were 3.18 and 1.33 cm,respectively. At D5 density,the lodging rate and hollow bar ratio of Mingyu 268 both were the highest,which were 30.40% and 14.21%,respectively. With the increase of density,the ear length of each variety gradually decreased and the values of Sitai 112,Lilong 170,Mingyu 268 and Jinyuan 118 reached the maximum at the density of D1,which were 20.10,21.55,18.75 and 20.85 cm,and there was no significant difference in ear diameter among varieties（P>0.05）. At the density of D1 and D2,the yield and net income of Sitai 112 were highest,which were 14.68,15.01 t/hm² and 27 394,28 017 yuan/hm². At the density of D3 and D4,the yield and net income of Lilong 170 were highest,which were 17.09,17.00 t/hm² and 32 504,32 206 yuan/hm². At the density of D5,the yield and net income of Jinyuan 118 were highest,which were 13.13 t/hm² and 23 585 yuan/hm².【Conclusion】In Hetao irrigation district of Inner Mongolia,the high-yield cultivated varieties were Sitai 112 at 90 000 and 97 500 plants/hm²,Lilong 170 at 105 000 and 112 500 plants/hm²,and Jinyuan 118 at 120 000 plants/hm².

【Objective】To evaluate the yield stability and adaptability of spring-sown millet varieties in the Loess Plateau of northwest Shanxi,as well as the representativeness and discrimination of each experiment site,provide a theoretical basis for the rational layout of millet varieties in the northwest Shanxi and the selection of experimental site for millet variety identification.【Methods】The GGE biplot was used to analyze the yield stability,adaptability,and environmental discrimination and representativeness of 12 millet varieties（lines） tested in 8 experimental sites on the Loess Plateau in northwest Shanxi Province in 2021 and 2022.【Results】The impact of variety（line）,environment,and the interaction between variety（line） and environment on the yield of millet showed a extremely significance. The 8 experimental sites are divided into two ecological zones,with Yuanping,Pianguan,Linxian,and Baode as the same ecological zone,Wuzhai,Jingle,and Lanxian as another ecological zone,and Xingxian′s results over the past two years had been unstable and unable to be divided.Among the 12 tested millet varieties（lines）,Changnong No. 35 and Changnong No. 47 showed high and stable yields,suitable for planting in 8 experimental sites on the Loess Plateau in northwest Shanxi;Changsheng No. 13 had good yield but is unstable,suitable for planting in Wuzhai,Jingle,and Lanxian;Jingu No. 21 had good stability but low yield;However,the yield and stability of Cheng 15-m328 were poor,making it unsuitable for planting on the Loess Plateau in northwest Shanxi.【Conclusion】The high-yield and stable millet varieties suitable for planting on the Loess Plateau in northwest Shanxi Province are Changnong No. 35 and Changnong No. 47.The 3 experimental sites of Linxian,Jingle,and Pianguan have high discrimination and representativeness,and are ideal experimental sites for identifying millet varieties;The 3 experimental sites of Yuanping,Wuzhai,and Baode have strong discrimination but insufficient representativeness,making them suitable for screening millet varieties with poor stability.

【Objective】To isolate and screen plant growth-promoting strains from the roots and rhizosphere soil of Artemisia argyi.【Methods】To collect root and rhizosphere soil samples of Artemisia argyi from Ordos and Tongliao in Inner Mongolia,isolate and purify symbiotic fungi-dark septate endophytes（DSE） and functional bacteria,identify them using molecular biology techniques,screen DSE strains and functional bacteria with significant growth promoting effects,construct artificial microbial communities,and set up non inoculated bacteria（A）,single inoculated DSE（B）,single inoculated phosphate-solubilizing bacteria（C）,single inoculated nitrogen-fixing bacteria（D）,DSE+phosphate-solubilizing bacteria（E）,DSE+nitrogen-fixing bacteria（F）,phosphate-solubilizing bacteria+nitrogen-fixing bacteria（G）,DSE+phosphate-solubilizing bacteria+nitrogen-fixing bacteria（H） eight treatments were used to conduct a rewinding experiment on Artemisia argyi plants to screen for the best bacterial strain.【Results】The colonization rate of DSE fungi in the roots of Artemisia argyi was the highest,and the symbiotic structure was mainly chain,strip,brain and scattered. Four strains of DSE were successfully isolated from the roots of Artemisia argyi,among which Paraphoma chrysanthemicola was the dominant strain in both test sites. A total of 36 functional bacteria were isolated from the rhizosphere soil of Artemisia argyi,including 26 phosphate-solubilizing bacteria and 10 nitrogen-fixing bacteria. The phosphate-solubilizing bacteria were mainly Bacillus,accounting for 30.50% of the total number of isolates,of which Bacillus pumilus accounted for 27.20%. Rhizobium was the main nitrogen-fixing bacteria,accounting for 16.67% of the total number of isolates,of which Rhizobium cellulosilyticum accounted for 33.30%.The growth indexes of Artemisia argyi in B-H treatments were better than those in A treatment. Among them,H treatment had the best growth-promoting effect,and its stem diameter,leaf number,aboveground biomass and underground biomass increased by 24.93%,80.00%,279.17% and 251.69%,respectively.【Conclusion】The compound inoculation of Paraphoma chrysanthemicola,Bacillus pumilus and Rhizobium cellulosilyticum had the best growth-promoting effect,and DSE+phosphate-solubilizing bacteria+nitrogen-fixing bacteria treatment was the best growth-promoting microbial combination.

Sea buckthorn is widely planted in the northwest region of China,and its fruit contains abundant phenolic compounds,sugars,vitamins,etc. It has antioxidant and anti-aging,immune regulation,anti-inflammatory and anti-tumor,skin health and other effects. As a medicinal and edible plant,sea buckthorn fruit is used in industries such as food,medicine,agriculture,and animal husbandry. The article provides an overview of the chemical composition and pharmacological effects of sea buckthorn fruit,aiming to lay the foundation for further exploration and utilization of sea buckthorn fruit resources.

【Objective】To analyze the effect of spraying compound biological agents on the quality of tobacco leaves in southern Shaanxi during the initial baking process of flue-cured tobacco,so as to provide a reference for the selection of the material ratio of compound biological agents and the regulation of the quality of tobacco leaves after curing.【Methods】The upper leaves （B2F） of Yunyan 99 was the main flue-cured tobacco cultivar in Shangluo City,Shaanxi Province,were used as the experimental materials,and three kinds of compound biological agents （SXC-4） were designed,including 5% material ratio （T1）,4% material ratio （T2） and 3% material ratio （T3）,and sprayed at the yellowing stage and final stage （42 °C） at the initial baking stage,and the chemical composition and aromatic substance content of the flue-cured tobacco leaves were determined, and the sensory evaluation and analysis were carried out.【Results】Compared with CK,the degradation effect of pectin and lignin was the best under T1 treatment,which decreased by 58.00% and 5.90%,respectively;the content of free amino acids and aromatic substances in the downstream of T2 treatment had the best effect,increasing by 6.50% and 51.80%,respectively;under T3 treatment,the contents of reducing sugar,total sugar,chrysatropic acid,degradation products of plastid pigments,phenylalanine aromatic substances and Amadori compounds content increased the most,which were 21.00%,17.00%,51.00%,54.80%,2.70% and 11.20%,respectively,and the score of sensory quality was the highest,was 60.95;pectin and lignin of T3 treatment decreased by 43.49% and 4.50%,respectively,and the content of free amino acids increased by 2.90%,the treatment effect was worse than T1 and T2 treatments.【Conclusion】The spraying of compound biological agents in the initial baking stage of flue-cured tobacco can improve the coordination of chemical components,the aroma quality and quantity of tobacco leaves,improve the transmission,reduce miscellaneous qi and thrill,improve the concentration and strength,and significantly improve the sensory quality,among which the spraying of compound biological agents with 3% material ratio can significantly improve the quality of tobacco leaves in southern Shaanxi.

【Objective】To analyse the components of the essential oil of Potentilla bifurca L. var. major Ledeb..【Methods】 The essential oil of Potentilla bifurca L. var. major Ledeb. was prepared by steam distillation and Soxhlet organic extraction,headspace（HS）-solid phase microextraction（SPME）-gas chromatography-mass spectrometry（GC-MS）was used to analyse the components of the essential oils.【Results】A total 113 volatile substance compounds were identified and separated in the essential oils prepared by two methods,mainly including alcohols,esters,aldehydes,olefins,ketones,alkanes and organic acids compounds.Among them,the relative content of ester compounds was the highest at 50.10%;next were alcohols and alkanes,accounting for 39.24% and 8.16%,respectively.【Conclusion】The main volatile substances in the essential oil of Potentilla bifurca L. var. major Ledeb. are esters,alcohols and alkanes.

Quinoa has multiple health effects such as antioxidant,anti-cancer,anti-allergy,sugar control,lipid regulation,cardiovascular and cerebrovascular protection,etc.Quinoa is a multi-grain food with full nutrients,high biological activity and multi-health functions,and has a large development space. This paper reviews the protein,amino acids,unsaturated fatty acids such as linoleic acid and linolenic acid,complex vitamins such as vitamin B₂,vitamin B₆,and folic acid,minerals such as Mg,Zn,and Fe,and bioactive substances such as polyphenols,flavonoids,saponins,and polysaccharides in quinoa,and analyzes other functions and development prospects of quinoa. And put forward the scientific and technological research suggestions of quinoa in the big health industry.

【Objective】To investigate the effects of different mixed sowing proportions of hairy vetch and oat on crop yield,soil enzyme activity and microbial communities in the agricultural dry-crop areas at the northern foothills of the Yinshan Mountains in Inner Mongolia.【Methods】Using hairy vetch and oat as experimental objects,six treatments were set up,namely,single sowing of hairy vetch（DB1）,single sowing of oat（DB2）,80% hairy vetch+ 20% oat（HB1）,60% hairy vetch+40% oat（HB2）,40% hairy vetch+60% oat（HB3）,and 20% hairy vetch+80% oat（HB3）. Soil samples were collected from the 0-20 and 20-40 cm soil layers in the early,middle,and late stages of growth,respectively. The effects on crop yield,soil enzyme activity and microbial biomass carbon and nitrogen content were analyzed,and changes in soil microbial community diversity and structure were analyzed by using high-throughput sequencing technology.【Results】HB1,HB2,HB3 treatments were 1%-11% higher than DB1 treatment for the relative grain yield of hairy vetch,and 3%-25% higher than DB2 treatment for the relative grain yield of oat. During the mid growth stage in the 0-20 cm soil layer,compared with DB1 and DB2 treatments,HB2 treatment soil catalase activity significantly increased by 9.65% and 11.55% （P<0.05）,respectively,and sucrase activity significantly increased by 11.47% and 15.44%（P<0.05）,HB1 treatment increased urease activity by 8.07% and 19.41%（P<0.05）,respectively;HB2 treatment had the highest microbial biomass carbon content,while HB1 treatment had the highest microbial biomass nitrogen content,at 95.79 and 21.02 mg/kg,respectively. Compared with the DB2 treatment,the HB2 treatment soil bacterial OTU index was significantly increased by 15.79%（P<0.05）,the Shannon index increased by 5.41%;Compared with DB1 treatment,HB2 treatment increased fungal OTU index by 33.58%（P<0.05）,Shannon index increased by 36.50%,and Chao1 index increased by 6.56%. At the phylum level,HB2 treatment increased the relative abundance of Proteobacteria,Chloroflexi,and Mortierellomycota,while decreasing the relative abundance of Actinobacteriota,Acidobacteriota,Ascomycota,and Basidiomycota.【Conclusion】The mixed sowing treatment of 60% hairy vetch +40% oat is a suitable proportion for agricultural dry-crop areas in the northern foothills of Yinshan Mountains,Inner Mongolia. Under this treatment,crop grain yield is the highest,soil enzyme activity and microbial biomass carbon and nitrogen content are higher,and soil bacterial and fungal diversity,richness,and relative abundance of beneficial bacterial phyla are all increased.

【Objective】 To explore the improvement effect of adding sheep manure and humic acid on saline-alkali land in Hebei Province.【Methods】 A field experiment was conducted in Lincheng County,Hebei Province,and five treatments were set up： no fertilization （CK）,single application of compound fertilizer （T1）,compound fertilizer with sheep manure （T2）,compound fertilizer with humic acid （T3）,and compound fertilizer with sheep manure and humic acid （T4）. The effects of different fertilization treatments on soil fertility,wheat yield,soil physical properties,enzyme activities and microorganisms were analyzed.【Results】 Compared with CK,soil fertility was significantly improved by all treatments,and the maximum increase of T4 treatment was 154.81%. Wheat yield was significantly increased by 58.52%,89.25%,83.96%,108.81% （P<0.05）,and T4 treatment had the best effect. It can reduce soil pH value,soluble salt concentration （EC） and bulk density. T4 treatment has significant effect,and the maximum reduction was 6.72%,21.75% and 7.75%,respectively. Soil porosity could be improved,and the maximum increase of T4 treatment was 33.94%. Soil enzyme activity was significantly increased（P<0.05）,and the maximum increase of T4 treatment was 142.41%. The number of fungi,bacteria and actinomycetes and the total amount of microorganisms in soil could be increased by T4 treatment,and the maximum increase was 158.10%,147.32%,117.99% and 145.25%,respectively.【Conclusion】 Adding application of sheep manure and humic acid can improve soil fertility saline alkali land,increase wheat yield,improve soil physical properties,increase soil enzyme activity and microbial total amount,and can be used as an effective means to improve saline-alkali soil in Lincheng County,Hebei Province.

【Objective】 To clarify the cold tolerance of Atractomorpha burri population.【Methods】 The supercooling capacity of each stage of Atractomorpha burri and the survival rate of young and old nymphs at low temperature conditions were determined by using the supercooling point tester in Qujing City,Yunnan Province.【Results】 There were significant differences in the supercooling point and freezing point of different stages of Atractomorpha burri（P<0.05）. The supercooling point and freezing point of egg stage were the lowest,which were -16.16,-8.13 ℃,respectively. The supercooling point and freezing point of the 3rd instar nymphs were the highest,which were -8.35,-5.20 ℃,respectively. The supercooling point and freezing point of male adults were -10.26,-7.18 ℃,respectively,which were lower than -9.00,-7.00 ℃ of female adults. The variation of supercooling point and freezing point of different individuals in the same stage conformed to normal distribution. Under low temperature conditions,the temperature of more than 50% mortality of the 3rd and 5th instar nymphs was -7.00,-9.00 ℃,respectively.【Conclusion】The cold tolerance of the egg stage of Atractomorpha burri was the strongest,the 5th instar nymphs had stronger low temperature tolerance,and the cold resistance of male adults was stronger than that of female adults.

【Objective】To study effects of different selenium application amount on selenium content,quality and yield of flower buds of Hemerocallis citrina Baroni,provide reference for planting selenium-rich Hemerocallis citrina Baroni.【Methods】Four varieties of Hemerocallis citrina Baroni were selected,including Changzuizihua,Sanyuehua,Qingchong,and Dawuzui. Selenium fertilizer was applied to the roots during the bolting period,with selenium application amounts of 150 kg/hm² （Se10）,225 kg/hm²（Se15）,and 300 kg/hm²（Se20）,respectively,with no selenium fertilizer application as the control （Se0）. The selenium content,quality,yield,and selenium accumulation in the flower buds of Hemerocallis citrina Baroni were measured after harvesting on June 30 and July 8,2022.【Results】After selenium treatment,the selenium content and selenium accumulation of Hemerocallis citrina Baroni flower buds increased,and the selenium content and selenium accumulation of Changzuizihua were the highest,which were 0.031 mg/kg and 752.786 mg/hm². With the increase of selenium application amount,the selenium content in the flower buds of all varieties at two picking times showed a trend of first increasing and then decreasing,the optimal selenium application amount for Changzuizihua and Sanyuehua was 150 kg/hm²,and the selenium content in flower buds was 0.031,0.070 mg/kg and 0.010,0.003 mg/kg,respectively. While the optimal selenium application amount for Qingchong and Dawuzui was 225 kg/hm²,and the selenium content of flower buds was 0.006,0.015 mg/kg and 0.015,0.030 mg/kg,respectively. After drying,the selenium content of dry sample showed a multifold relationship with that of fresh sample,which was 3.47-4.00,consistent with the water content. There was no loss of selenium content during drying process. With the increase of selenium application amount,the flower bud weight and flower bud yield of all varieties increased first and then decreased,but the effects on bud length and width were different among all varieties. 【Conclusion】Moderate application of selenium fertilizer can improve the selenium content,quality,and yield of Hemerocallis citrina Baroni flower buds. Excessive application of selenium fertilizer can inhibit the weight of Hemerocallis citrina Baroni flower buds and reduce yield.

【Objective】To study the effects of different exposed scape lengths of onion scape on their yield,nutritional quality, and antioxidant activity,then provide reference for the edible and development of onion scape.【Methods】Onion scape variety 911 was used as the experimental material,and field planting was adopted. Based on the length of onion scape exposure,onion scape were selected at distances of 0,5,10,20,and 30 cm from the leaf outlet for sampling. The effects of different exposed scape lengths on onion scape length,scape diameter,fresh weight per scape,yield,and dry matter,soluble solids,soluble sugar,soluble protein,pyruvic acid,total phenolic,total flavonoid content,as well as FRAP free radical scavenging rate,DPPH free radical scavenging rate,ABTS free radical scavenging rate were analyzed.【Results】With the growth of onion scape,the linear regression equation for scape length was y=1.096 4x+22.751 0,R²=0.987 7;the linear regression equation for scape diameter was y=0.135 5x+5.310 9,R²=0.985 5;the linear regression equation for fresh weight per scape was y=0.844 4x+4.017 1,R²=0.993 8;the yield was 2 813.850~11 544.000 kg/hm². The dry matter content ranges from 10.590% to 12.040%,the soluble solids content ranges from 9.740% to 14.330%,the soluble sugar content ranges from 69.530 to 89.160 mg/g,the soluble protein content ranges from 0.870 to 1.170 mg/g,the pyruvic acid content ranges from 0.065 to 0.089 mg/g,the total phenolic content ranges from 3.200 to 4.770 mg/g,and the total flavonoid content ranges from 0.344 to 0.557 mg/g. Compared with a scape length of 0 cm,when the scape length was 20 cm,the dry matter,soluble solids,and pyruvic acid content increase significantly by 7.930%,13.150% and 33.850%,respectively （P<0.05）;The soluble protein content increased by 3.260%;The content of soluble sugar and total phenols significantly decreased by 15.250% and 24.530%,respectively（P<0.05）. The FRAP free radical scavenging rate,DPPH free radical scavenging rate,and ABTS free radical scavenging rate showed a decreasing trend from 0 to 20 cm,with the lowest values observed at 20 cm.【Conclusion】The shorter the onion scape,the larger the average membership function,and the better the comprehensive nutritional quality and antioxidant capacity. However,considering the yield,edibility,nutrient content,and antioxidant activity of onion scape,the most suitable harvesting period is when the onion scape are 20 cm long,and the yield can reach 11 544.000 kg/hm².

【Objective】To investigate the prevention and control effect of plant inducible resistance agents on field sunflower broomrapes,and provide a new perspective for the comprehensive prevention and control of sunflower broomrapes.【Methods】The test sites were located in Siziwang Banner,Ulanqab City and Guyang County,Baotou City,Inner Mongolia. The parasitism rate and parasitism degree of sunflower broomrape were assessed at four different time points（20 th July,10 th August,15 th August,and 30 th September） using a drip irrigation system in the field. The treatments included jinmiao target,chitin and Bacillus subtilis,a combination of jinmiao target and chitin and Bacillus subtilis complex,and water as control（CK）. The effects of two plant inducible resistance agents on Orobanehe cumana parasitical sunflower growth indexes and yield were investigated. 【Results】After drip irrigation with jinmiao target alone,the parasitism degrees of sunflower broomrape in both test sites was significantly lower than that of CK（P<0.05）,which were reduced by 2.95,6.27,3.97 and 1.11,4.99,4.08. The plant height and yield of sunflower increased significantly in both sites（P<0.05）. The plant height was increased by 39.15,36.97,20.66 and 22.50 cm. The yield was increased by 892.80 and 984.00 kg/hm²,respectively. After only drip irrigation with chitin and B. subtilis,parasitism degrees increased significantly compared with CK at different time points（P<0.05）. The parasitism degrees of the two test sites increased by 5.71,3.77,1.91 and 1.36,14.12,13.03,respectively. There was no significant difference between CK and other sunflower growth indexes（P>0.05）. After a combination of jinmiao target and chitin and B. subtilis drip irrigation,parasitism rates and parasitism degrees were significantly reduced compared with CK. The parasitism rate decreased by 79.60%,31.80%,19.00% and 36.67%,81.00%,35.67%,respectively. Parasitism degree decreased by 7.25%,9.69%,8.80% and 1.33%,6.01%,5.61%,respectively. Plant height,disc diameter and yield of sunflower were significantly increased compared with CK（P<0.05）. The plant height was increased by 23.08,33.49 and 14.08,11.33 cm,respectively. The disc diameter was increased by 6.18 and 4.44 cm,respectively. The yield was increased by 796.80 and 835.20 kg/hm²,respectively.【Conclusion】The combination of jiaomiao target and drip irrigation can be integrated into the green prevention and control technology system of sunflower broomrapes for effective prevention and control.