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Study on the application effect and recommended dosage of nitrogen,phosphorus,and potassium fertilizers on chickpea
FAN Yafang, CHEN Wenjin, KONG Qingquan, HE Xiaoyong, GUO Chen, LIU Jian, ZHANG Lijun, GUO Liming, HE Youquan, HU Ruifeng
2023, 51(2):
41-48.
doi:10.12190/j.issn.2096-1197.2023.02.05
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【Objective】Exploring the optimal application rates of nitrogen,phosphorus,and potassium fertilizers for chickpea in Inner Mongolia,providing reference for cost saving,efficiency improvement,and scientific fertilization in chickpea production in local and similar regions.【Methods】Using Mengying No.3 chickpea as experimental material and“3414”regression design,three factors including nitrogen,phosphorus,and potassium were set up,with four levels for each factor and 14 treatment combinations in total. The effects of different nitrogen,phosphorus,and potassium fertilizer combinations on the yield components,yield,and economic benefits of chickpea were analyzed. Fitting the unit fertilizer efficiency model with univariate quadratic model to determine the optimal application rates of N,P2 O5 ,and K2 O.【Results】With the increase of nitrogen,phosphorus,and potassium fertilizer,the plant height,crown width,grain number per plant,and effective pod number of chickpea increased first and then decreased,while the impact pattern on the number of main stem nodes,the first branch of a single plant,pod length,pod width and 100-seed quality was not obvious. In the comparison of treatment 2(N,P2 O5 ,and K2 O application rates at 0,120.0,and 75.0 kg/hm2 respectively)and treatment 6(N,P2 O5 ,and K2 O application rates at 150.0,120.0,and 75.0 kg/hm2 respectively),the application of N at 150.0 kg/hm2 increased the yield of chickpea by 705.19 kg/hm2 compared with no N application. In the comparison of treatment 4(N,P2 O5 ,and K2 O application rates at 150.0,0,and 75.0 kg/hm2 respectively)and treatment 6,the application of P2 O5 at 120.0 kg/hm2 increased the yield by 556.13 kg/hm2 compared with no P application. In the comparison of treatment 8(N,P2 O5 ,and K2 O application rates at 150.0,120.0,and 0 kg/hm2 respectively)and treatment 6,the application of K2 O at 75.0 kg/hm2 increased the yield by 254.37 kg/hm2 compared with no K application. The maximum yield of chickpea was at 2 582.37 kg/hm2 ,when the application rates of N,P2 O5 ,and K2 O were at 150.0,120.0,and 75.0 kg/hm2 . The fertilizer effect of nitrogen fertilizer was highest followed by phosphorus fertilizer and then potassium fertilizer. The fitting of the univariate quadratic model to the unit fertilizer efficiency model reached significant level. The optimal application rates of N,P2 O5 ,and K2 O were 148.5,112.6,and 72.8 kg/hm2 ,with the optimal economic yields of chickpea at 2 535.07,2 541.57,and 2 589.79 kg/hm2 ,respectively.【Conclusion】When the application rates of N,P2 O5 ,and K2 O were at 150.0,120.0,and 75.0 kg/hm2 ,chickpea had the highest yield of 2 582.37 kg/hm2 . By fitting the univariate quadratic model,the optimal application rates of N,P2 O5 ,and K2 O for chickpea in Inner Mongolia were 148.5,112.6,and 72.8 kg/hm2 ,and the optimal economic yield was 2 535.07 to 2 589.79 kg/hm2 .