小麦/大豆间作氮磷肥效的双变量分析  

Double variables analysis of nitrogen and phosphorus fertilizer effects in wheat/soybean intercropping system

作　　者：孙建好[1] 李隆[2] 李娟[1] 

机构地区：[1]甘肃省农业科学院土肥所,甘肃兰州730070 [2]中国农业大学资源与环境学院教育部植物与土壤相互作用重点实验室,北京100094

出　　处：《干旱地区农业研究》2007年第4期183-186,共4页Agricultural Research in the Arid Areas

基　　金：国家重大基础研究发展项目(G1999011707);国家自然科学基金项目(30070450)

摘　　要：采用双变量分析法,分析小麦/大豆间作氮磷肥效。结果表明:①小麦/大豆间作种植施用磷肥对大豆的增产作用超过小麦,施用氮肥能明显提高间作系统中小麦产量,但大豆产量降低。②小麦/大豆间作的产量互补效应表现为:小麦产量提高,大豆产量相应下降;大豆产量提高,小麦产量变化不大。③在小麦/大豆间作中,施磷提高小麦千粒重,增加大豆粒数;施氮增加小麦穗粒数,降低小麦与大豆的千粒重。氮磷配施,磷肥能缓冲施氮引起的小麦与大豆千粒重的降低。Double variables analysis was used to analyze nitrogen and phosphorus fertilizer effect in wheat/ soybean intercropping system. Results showed that soybean yield was increased more than wheat when phosphorus fertilizer was applied while wheat yield was increased significantly and soybean yield was decreased when nitrogen fertilizer was used. Complementary effects of wheat/soybean intercropping system indicated that：when wheat yield was increased, soybean yield decreased; but when soybean yield increased, wheat yield changed little. Effect of applying nitrogen fertilizer and phosphorus fertilizer was different. Phosphorus application can enhance wheat 1000 grain weight and soybean grain number while nitrogen application can increase wheat grain number and decrease 1000 grain weight of wheat and soybean. Nitrogen and phosphorus applied together can buffer the drop of 1000 grain weight of wheat and soybean resulted from nitrogen application.

关 键 词：双变量分析法 小麦/大豆间作 互补效应 产量构成 

分 类 号：S318[农业科学—作物栽培与耕作技术] S143[农业科学—农艺学]