钾素水平对绿豆产量及养分吸收积累的影响.doc

.页眉. 页脚.. 钾素水平对绿豆产量及养分吸收积累的影响李莉 1 展茗 2 万正煌 1 仲建锋 1 陈宏伟 1 (1. 湖北省农科院粮食作物研究所,武汉 430064 ; ,武汉 4300 70.) 摘要: 通过田间试验与采样分析研究了钾肥施用对绿豆氮磷钾吸收积累量和产量构成因子的影响。结果表明:绿豆植株中钾养分积累量随钾肥施用量的增加呈抛物线变化趋势,施钾提高了籽粒和茎杆中钾的积累量,其中钾素用量为 90-135 kg/hm 时,养分积累量最高。施钾(K 0)45 、 90、 145 和 180kg/hm 与不施钾相比平均籽粒产量分别增加 % 、 % 、 % 和 % ,荚果含钾量增加 % 、 % 、 % 和 % ,植株地上部钾素总累积量提高 % 、 % 、 % 和 % 。说明施钾能提高绿豆产量、提高荚果对钾素吸收和累积。施用钾肥效应方程为 Y=+- (R = ),说明合理施用钾肥,可以提高钾肥利用率和绿豆产量,施用过量则出现报酬递减。关键词: 绿豆;钾肥;氮磷钾;产量 Effect of Potassium Application on Yield and Nutrient Accumulation of Mung Bean Li Li, Zhan Ming ,W anZ henghuang , Zhong Jianfeng , Chen Hongwei ( Institute of Food Crops,Hubei Academy of Agricultural Sciences,Wuhan 430064 ; College of Plant Science and Technology,Huazhong Agricultural University,Wuhan 430070,China .) Abstract: Through the field experiment and the sampling analysis, effect of potassium application on N,P and K accumulation and ponent of mung bean was studied. The results indicated that t here was a parabola regular patte rn of the nutrient accumulation while the application rate ofK increased. The total accumulation ofK in the mung bean stems and pods increased with the application of potassium fertilizer, and the maximum was at 90-135 kg ha ?K pared to noK treatment,the average yield of the treatment with KO rates 45,90,135 and 180kg/hm