Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (19): 18-24.doi: 10.11924/j.issn.1000-6850.casb20190400003

Special Issue: 油料作物 玉米

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Nitrogen Absorption and Utilization Under Strip Multiple Cropping Pattern of Different Maize Varieties and Soybean

Wang Jing1, Su Dongtao1, Li Nana2()   

  1. 1Institute of Agricultural Resources and Economics, Shanxi Academy of Agricultural Sciences, Taiyuan 030006
    2Dryland Agriculture Research Center, Shanxi Academy of Agricultural Sciences, Taiyuan 030031
  • Received:2019-04-17 Revised:2019-05-22 Online:2020-07-05 Published:2020-07-08
  • Contact: Li Nana E-mail:linana2002@163.com

Abstract:

This study aims to use the biological nitrogen fixation of soybean scientifically and to select the optimal combination under corn and soybean strip multiple cropping mode. ‘Dafeng 26’ (IC1), ‘Dafeng 30’ (IC2), ‘Qiangsheng 51’ (IC3) and ‘Qiangsheng 388’ (IC4) were used as materials, the single factor randomized block and long-term location experiment was used to determine the nitrogen utilization and yield of each maize variety. The results showed that under corn and soybean strip multiple cropping mode, the yield and aboveground biomass of maize was as following: IC2>IC3>IC4>IC1 (P<0.05). Compared with IC1, IC3 and IC4 treatments, IC2 treatment increased the average annual nitrogen accumulation, nitrogen agronomic utilization rate, nitrogen physiological utilization rate and nitrogen partial productivity significantly by 10.8%, 11.0%, 15.3%; 17.3%, 32.3%, 26.2%; 36.8%, 34.9%, 30.1%; 18.8%, 20.6%, 12.5%, respectively. The average annual nitrogen harvest index of IC2 treatment was significantly decreased by 4.6 percentage points compared with that of IC4 treatment (P<0.05). In addition, nitrogen agronomic utilization rate, nitrogen physiological utilization rate, nitrogen harvest index were significantly and positively correlated with yield (P<0.05). The comprehensive results showed that ‘Dafeng 30’ and soybean strip multiple cropping could significantly improve crop yield and nitrogen use efficiency, and they could be promoted as a better combination in Shanxi Province.

Key words: strip multiple cropping, variety, maize, yield, nitrogen efficiency

CLC Number: