作　　者： ; ; ; ; ; ;

机构地区： 华南农业大学农学院热带亚热带生态研究所

出　　处： 《中国生态农业学报》 2010年第3期627-631,共5页

摘　　要： 通过田间试验,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55d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。 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.

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

领　　域： [农业科学] [农业科学]