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Acta Agron Sin ›› 2015, Vol. 41 ›› Issue (11): 1740-1747.doi: 10.3724/SP.J.1006.2015.01740


Effects of Shade and Light Recovery on Soybean Cultivars (Lines) and Its Relationship with Yield in Relay Strip Intercropping System

WU Yu-Shan1,GONG Wan-Zhuo1,LIAO Dun-Ping2,WU Xiao-Ling1,YANG Feng1,LIU Wei-Guo1,YONG Tai-Wen1,YANG Wen-Yu1,   

  1. 1College of Agronomy, Sichuan Agricultural University / Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu 611130, China; 2 Plant Protection and Inspection Station in Dongpo Region of Meishan, Meishan 620020, China
  • Received:2015-02-05 Revised:2015-07-20 Online:2015-11-12 Published:2015-08-12


A field experiment was conducted to compare agronomic traits during shade and light recovery periods between high yield and low yield soybean cultivars undershade net or in “maize-soybean” relay strip intercropping in 2013 and 2014. Twenty typical soybean varieties with dirrerent yield levels in relay cropping in south of China were used. The results showed that during shade period stem dry weight and leaf dry weight were significantly lower than those of control , the dry weght natio of stem and leaf was 58.4% and 41.6% respectively under shade. Compared with the high yield soybeans, low yield cultivars had significantly higher decline rate of aboveground dry weight, stem length , stem length/ stem diameter, stem length/ aboveground dry weight, stem length/ leaf area. and the yield was positively correlated with aboveground dry weight, and negatively correlated with stem weight ratio during shade period. During light recovery period, aboveground dry weight and leaf area increased rapidly, soybean showed more leaf weight ratio, stem dry weight and leaf dry weight were 47.7% and 52.3% respectively at 30 days after the recovery of light. High yield soybeans had significantly higher aboveground dry weight, leaf area, stem diameter, leaf weightratio and significantly smaller stem length/ stem diameter, stem length/aboveground dry weight, stem length/leaf area. In light recovery duration, yield was positively correlated with aboveground dry weight, stem diameter, leaf area,and leaf weight ratio, and negatively correlated with stem length/ stem diameter, stem length/ aboveground dry weight. Stem length/ aboveground dry weight, stem diameter and leaf weight ratio were the three biggest variables determing yield selected by regression analysis. These results concluded that soybean cultivars with smaller stem length, larger aboveground dry weight and leaf area during shade period and smaller stem length/ aboveground dry weight, larger stem diameter and higher leaf weight ratio could obtain high yield in relay strip intercropping.

Key words: Relay strip intercropping, Shade, Light recovery, Soybean, Compensation growth, Yield

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