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引用本文:	李志贤,王建武,杨文亭,舒磊,杜清,刘丽玲. 广东省甜玉米/大豆间作模式的效益分析[J]. 中国生态农业学报(中英文), 2010, 18(3): 627-631
	LI Zhi-Xian,WANG Jian-Wu,YANG Wen-Ting,SHU Lei,DU Qing,LIU Li-Ling. Benefit of sweet corn/soybean intercropping in Guangdong Province[J]. Chinese Journal of Eco-Agriculture, 2010, 18(3): 627-631
DOI：	10.3724/SP.J.1011.2010.00627

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广东省甜玉米/大豆间作模式的效益分析
李志贤^1,2,3, 王建武^1,2,3, 杨文亭^1,2,3, 舒磊^1,2,3, 杜清^1,2,3, 刘丽玲^1,2,3
1. 华南农业大学热带亚热带生态研究所广州 510642;2. 华南农业大学农业部生态农业重点开放实验室广州 510642;3. 广东省高等学校农业生态与农村环境重点实验室广州 510642

摘要: 过田间试验, 研究了甜玉米/大豆间作对甜玉米产量、主要农艺指标、养分利用率和光能利用率的影响。结果表明, 甜玉米/大豆间作模式的土地当量比大于1(1.07), 说明甜玉米/大豆间作具有一定的产量优势;与单作相比, 间作甜玉米千粒重提高17.88%, 差异显著; 甜玉米/大豆间作群体经济效益提高24.08%, 养分利用率提高54.09%, 两指标的差异达到极显著水平; 生长后期, 间作对甜玉米光能利用体现出一定的正效应, 播后55 d间作甜玉米光能利用率较单作增加28.44%。甜玉米/大豆间作不仅可改善作物群体结构, 提高自然资源利用率, 而且可减少化肥施用量, 具有显著的经济和环境效益。

关键词: 甜玉米/大豆间作辐射利用率养分利用率土地当量经济效益

中图分类号:

基金项目:国家科技支撑计划项目(2007BAD89B14)和广东省科技计划项目(2008A020100011)

Benefit of sweet corn/soybean intercropping in Guangdong Province

LI Zhi-Xian^1,2,3, WANG Jian-Wu^1,2,3, YANG Wen-Ting^1,2,3, SHU Lei^1,2,3, DU Qing^1,2,3, LIU Li-Ling^1,2,3

1. Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China;2. Key Laboratory for Ecological Agriculture of Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, China;3. Key L

Abstract: Field experiments were conducted to investigate the effect of sweet corn/soybean intercropping on yield, agronomic indices, and nutrient and radiation use efficiency of sweet corn. Results show a high land equivalent ratio (1.07) for sweet corn/soybean intercropping, indicating a certain degree of yield advantage. Compared with the monoculture, the intercropping significantly increases sweet corn 1000-grain weight by 17.88%, economic benefit by 24.08%, and nutrient use efficiency by 54.09%. Intercropping positively influences radiation use efficiency during the later stage of growth. There is 28.44% increase in radiation use efficiency 55 days after sowing. Therefore sweet corn/soybean intercropping has significant economic and environmental benefits. It not only improves population structure and resource use efficiency of sweet corn, but also reduces fertilizer application.

Keyword: Sweet corn/soybean intercropping, Radiation use efficiency, Nutrient use efficiency, Land equivalent ratio, Economic benefit