空间布局对玉米/豌豆种间竞争力及产量的影响  

Effect of spatial arrangement on aggressivity and grain yield of maize/pea intercropping system

作　　者：刘淑梅[1] 黄鹏[1] 柴强[1] 谢鹏虓 彭正凯[1] 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070

出　　处：《甘肃农业大学学报》2014年第2期61-65,71,共6页Journal of Gansu Agricultural University

基　　金：国家科技支撑计划项目(2012BAD14B10);国家自然科学基金项目(31160265)

摘　　要：为了提高玉米/豌豆种植模式的生产水平,在甘肃省绿洲灌区,试验通过调整玉米/豌豆带田中两作物的间距及玉米行距,研究了不同空间布局对玉米/豌豆复合群体的光合物质积累、种间竞争力及经济产量的影响.结果表明:各试验处理复合群体的干物质积累量都符合Logistic的"S"型生长曲线,其中间作玉米、豌豆的干物质积累量都以间距30cm的处理最大,较间距15cm和45cm的处理提高了19.5%、18.0%和25.9%、25.6%,间距的改变对间作豌豆的干物质积累影响不显著.间作模式中整个共生期内玉米相对豌豆的竞争力均大于0,其中以间距45cm处理最大为0.50,较间距30cm和间距15cm的处理高31.6%和16.3%.间作与单作相比较增产优势明显,间作各处理的土地当量比均在1.20以上,两作物间距30cm时,经济产量最大,两作物总产量为12 915kg/hm2,比间距15cm和间距45cm的处理分别提高了11.8%和11.1%.Effects of different inter-specific spacing between pea and maize strips in maize/pea inter-cropping system on inter-specific aggressivity and grain yield were studied via a field experiment in arid oa-sis irrigated area in Gansu.Results showed that dry matter accumulation of each component crops in maize/pea intercropping was fitted to the Logistic growth function.Dry matter weight of intercropped maize was greatest in 30 cm spacing between pea and maize strips,an increase of 19.5% and 18.0%,as compared to 15 cm spacing and 45 cm spacing,respectively.It had no significant effect of strips spacing on dry matter accumulation of intercropped pea.Aggressivity of maize/pea intercropping was greater than 0 in co-growth period.Aggressivity for intercropped maize towards pea intercrops was greatest in 45 cm strips spacing, with a value of 0.50,an increase of 31.6% and 16.3%,as compared to 30 cm spacing and 15 cm spacing, respectively.Intercropping had significant yield advantages over sole crops,with their LER was greater than 1.20 among treatments.Grain yield was greatest in 30 cm strips spacing,with its yield of 12 915 kg/hm2 ,an increase of 11.8% and 11.1%,as compared to 15 cm spacing and 45 cm spacing,respectively.

关 键 词：绿洲灌区 玉米 豌豆 空间布局 种间竞争力 产量 

分 类 号：S344.2[农业科学—作物栽培与耕作技术]