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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2020, Vol. 42 ›› Issue (3): 390-.doi: 10.19802/j.issn.1007-9084.2019139

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Screening of shade tolerant soybean varieties and the relationship between agronomic characteristics and yield

  

  1. Institute of Ecological Agriculture, Sichuan Agricultural University/Key Laboratory of Crop Ecophysiology and Farm⁃
    ing System in Southwest China, Ministry of Agriculture and Rural Affairs, Chengdu 611130, China
  • Online:2020-06-28 Published:2020-06-05

Abstract:

In order to explore the relationship between soybean agronomic traits and yield, the relationship be⁃tween agronomic traits and yield of 27 soybean materials were studied under the conditions of net cropping and shade screen simulation of maize and soybean intercropping. The results showed that at seedling stage, under nor⁃mal light, the variation of branching characteristics was great and the contribution to the biomass of aboveground was small. The degree of variation and contribution of branches increased after being shaded. In the mature stage,under normal light, the branch grain weight contributed more to yield per plant than the main stem. But the percent⁃age of grain weight per plant was greater after shading. Five main components were obtained by principal component analysis, and the cumulative contribution rate under normal light and shade treatment reached 85.79% and 86.05% respectively.Two shade-tolerant soybean materials, Nandou 12 and E383, were selected. This study might provide a theoretical basis for increasing yield of intercropping soybean by promoting branching.

Key words:  , soybean;maize;branching;production;principal component analysis

CLC Number: