不同种植密度下甜玉米氮磷钾养分吸收量差异研究  

Study on the NPK Uptake of Sweet Corn Under Different Planting Densities

作　　者：赵荣芳[1] 文天祥[2] 陈惠阳[1] 冯颖竹[1] 

机构地区：[1]仲恺农业工程学院环境科学与工程学院,广州510225 [2]广东省农科院作物研究所,广州510640

出　　处：《中国农学通报》2015年第21期43-46,共4页Chinese Agricultural Science Bulletin

基　　金：广东省科技计划项目农业攻关项目"高产高效甜玉米最佳养分管理技术研究;示范与推广"(2012B020301005)

摘　　要：采用单因素田间试验,对不同种植密度对甜玉米产量和氮磷钾吸收量的影响进行了研究,以期为高产、优质、资源高效、环境保护等多重目标并重的最佳养分资源管理提供理论依据。结果表明:低密度(51282株/hm2)、中密度(61538株/hm2)和高密度(76923株/hm2)下,甜玉米鲜苞产量分别为9179、10285、11664 kg/hm2;氮磷钾养分施用量相同的情况下,低密度、中密度和高密度下,甜玉米收获期秸秆和籽粒总吸氮量分别为65.5、89.1、122.5 kg/hm2,总吸磷量分别为14.5、15.3、20.1 kg/hm2,总吸钾量分别为81.6、98.2、130.0 kg/hm2。甜玉米鲜苞产量和氮磷钾总吸收量均随着种植密度的增加而明显增加。The field experiment was conducted to study the effect of planting density on the sweet corn yieldand NPK uptake in order to supply theoretic basis for nutrient optimized management with the aim of highyield, excellent grain quality, high efficiency of nutrient resource and environment friendly. The main resultswere as follows： the fresh ear yield of sweet corn was 9179, 10285, 11664 kg/hm2, respectively, under lowdensity（51282 plant/hm2）, medium density（61538 plant/hm2） and high density（76923 plant/hm2）. At the sameamount of NPK fertilizer, the total nitrogen uptake of sweet corn stover and grain at harvest stage was 65.5,89.1, 122.5 kg/hm2, total phosphorus uptake was 14.5, 15.3, 20.1 kg/hm2, and total potassium uptake was 81.6,98.2, 130.0 kg/hm2, respectively, under low density, medium density and high density. The sweet corn fresh earyield and total NPK uptake increased significantly with the planting density increasing.

关 键 词：甜玉米 种植密度 产量 氮磷钾吸收量 

分 类 号：S665.1[农业科学—果树学]