安徽农业科学2011，Vol.39Issue(36)：22394,22476,2.
不同用量钾肥对玉米产量、经济效益及养分吸收的影响
Effects of Different Amounts of Potassium Fertilizer on Yield, Economic Benefits and Nutrient Uptake of Maize
摘要
Abstract
[Objective] The suitable dose of potassium fertilizer was explored to guide the scientific fertilization. [ Method] Field trial was conducted investigate the effects of different amounts of potassium fertilizer on yield, profit and nutrient uptake of maize. [Result] The treatment of applying potassium increased the yield by 724 -1 464 kg/hm2 and income by 843 - 1 365 yuan (RMB)/hm2 compared with the treatment without potassium. It also enhanced the uptake of N and P by maize. But the yield-increasing benefit and utilization ratio of the potassium fertilizer decreased with the increase of its amount. The potassium fertilizer effect equation was Y = 6 988. 257 1+13. 401 9X - 0. 033 4X2 ( R2 = 0. 963 5 * * ). When the amount of K2O was 201 kg/hm and the economic and reasonable K2O was 160 kg/hm2, the yield of maize reached the maximum value of 8 321 kg/hm2, the economic yield reached 8 278 kg/hm2. [ Conclusion ] On the basis of specific application of nitrogen and phosphate fertilizer,potassium fertilizer should be increased appropriately.关键词
钾肥/玉米/产量/经济效益/养分吸收Key words
Potassium fertilizer/ Maize/ Yield/ Economic benefits/ Nutrient uptake分类
农业科技引用本文复制引用
包红静,汪仁,邢月华,宫亮..不同用量钾肥对玉米产量、经济效益及养分吸收的影响[J].安徽农业科学,2011,39(36):22394,22476,2.基金项目
国际植物营养研究所(IPNI)项目 （IPNI）
科技部粮丰工程项目(2011BAD16B12). （2011BAD16B12）
