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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (27): 14-19.doi: 10.11924/j.issn.1000-6850.casb2024-0022

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Effects of Sowing Date, Density and Fertilizer Levels on Agronomic Traits and Yield of Soybean in Soybean and Maize Composite Planting

LI Yanlan1(), YANG Jincheng1(), WANG Xianzhi2, LI Zaofu3, LI Xiaoliang1, GAO Shilan3, LI Wenjun2, LIU Jianjian1, HU Xinzhou1, CAI Shujiang1, LI Xiang1, LUO Bin3   

  1. 1 Yuxi Academy of Agricultural Sciences, Yuxi, Yunnan 653100
    2 Yunnan University, Kunming 650500
    3 Yimen Agricultural Technology Extension Station, Yimen, Yunnan 651100
  • Received:2024-01-11 Revised:2024-03-29 Online:2024-09-24 Published:2024-09-24

Abstract:

To screen the best cultivation measures for soybean-maize intercropping, the effects of sowing date, density and fertilizer application rate on main traits and yield of soybean were studied by three-factor and three-level orthogonal test. The results showed that choosing fresh corn and soybean compound planting enabled soybeans to have a long photoperiod after corn harvest; increasing plant height, number of nodes in the main stem, number of effective pods per plant, number of grains per plant, 100-grain weight, and grain weight per plant had a facilitating effect on soybean yield, while the number of grains per plant, grain weight per plant, and hundred-grain weight had a decisive effect on the yield. Condensation analysis showed that cultivation with sowing period from April 30 to May 10, density of 210000-240000 plants/hm2, and fertilizer application rate of 300-375 kg/hm2 could obtain higher yield.

Key words: soybean, maize, sowing date, density, fertilizer rate, agronomic trait, yield