Journal of Northern Agriculture ›› 2020, Vol. 48 ›› Issue (6): 37-44.doi: 10.12190/j.issn.2096-1197.2020.06.06

• Soil and fertilizer · Water-saving irrigation • Previous Articles     Next Articles

Effects of different ameliorating measures on salinized soil properties and sunflower yield in Hetao Irrigation Area

BAI Yongxing1, MU Zongjie2, ZHAO Ju2, ZHAO Qiang1, LIU Xiaoyan1, LI Yanfang2, LU Xudong2, JING Yupeng2,3, LI Yuejin3   

  1. 1. Hanggin Rear Banner Agricultural Technology Promotion Center,Shanba 015400,China;
    2. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    3. College of Grassland,Resources and Enviroment,Inner Mongolia Agricultural Unversity,Hohhot 010011,China
  • Received:2020-10-16 Online:2020-12-20 Published:2021-02-04

Abstract: 【Objective】To study the effect of different ameliorating measures on the salinized soil in Hetao Irrigation Area.【Methods】Taking the typical salinized soil in the Hetao Irrigation Area as the research materials,using the field comparative test method,the effects of five ameliorating measures on the physical and chemical properties of the salinized soil,the changes in nutrient content,and sunflower growth indicators and yield were systematically studied.【Results】Different ameliorating measures could effectively reduce soil bulk density,salinized index,and increase soil porosity. Among them,the treatment of phosphogypsum+Mingsha+organic fertilizer had a more obvious ameliorating effect on soil physical properties,which was lower than the conventional fertilization treatment(control)10.27%,porosity increased by 13.00%;soil pH and alkalinity decreased by 7.17% and 12.49%,respectively,and soil desalination rate was 42.96%. Different ameliorating measures had different effects on the nutrient content of salinized soil. The organic matter and total nitrogen content of the soil treated with organic fertilizer,phosphogypsum+Mingsha+organic fertilizer increased by 8.06%-11.29% and 27.43%-28.24% respectively compared with the control. Except for the Mingsha treatment,the soil available nutrient content,sunflower plant height and stem diameter of the other treatments were significantly higher than the control,and the sunflower yield of the phosphogypsum+Mingsha+organic fertilizer treatment was 3 142.69 kg/hm2,which was 35.76% increase compared to the control.【Conclusion】Phosphogypsum+Mingsha+organic fertilizer treatment had the best effect on improving soil physical and chemical properties and nutrient content,followed by phosphogypsum+organic fertilizer,while Mingsha treatment was the worst one. The results could provide technical support for the improvement and utilization of salinized soil in Hetao Irrigation Area.

Key words: Ameliorating measures, Salinized soil, Soil physical and chemical properties, Sunflower, Yield

CLC Number: 

  • S646