德州地区抗虫棉施钾效果及最佳用量研究  

Study on the Optimum Application Rate of Potassium Fertilizer and Effect of Applying on Insect- resistant Cotton in Dezhou Region

作　　者：李凤瑞 史加亮 张东楼 王士立 田春利 杨秀凤 

机构地区：[1]山东省德州市农业科学研究院,山东德州253015

出　　处：《棉花科学》2015年第3期31-34,共4页Cotton Sciences

基　　金：山东省现代农业产业技术体系棉花产业创新团队遗传育种岗位项目;山东省科技厅农业良种工程项目(2009LZ005-04);德州市科技局项目(2008-04)

摘　　要：为研究鲁西北地区抗虫棉施用钾肥的增产效果及该地区的最佳钾肥施用量，在德州市良种场、武城县西魏村进行了大田试验。结果表明，一是施钾肥可以显著提高棉花产量，德州和武城的施硫酸钾（含K2O为50％）300 kg/hm2比不施钾肥分别增产22．1％和23．9％；二是施钾肥可增加上部果枝和外围节位的成铃数和铃重；三是当土壤速效钾含量为70～105 mg/kg时，鲁西北地区棉田比较适宜的硫酸钾施用量为120 kg/hm2。In order to study on the optimum application rate of potassium fertilizer and effect of applying on insect-resis-tant cotton in northwest Shangdong region . Field experiments were conducted in two sites in Dezhou . Results showed that, First,cotton yield was significantly increased under K fertilizer,which were 22 . 1% and 23 . 9% in two sites respectively . Second,the number and weight of bolls located in the top sympodial branches and the outer nodes were enhanced by K fertili-zer. Third,the soil available K content was 70~105mg/kg,the optimum application rate of K2SO4 was 120 kg/hm2 in north-west Shandong province .

关 键 词：德州地区 抗虫棉 钾肥 施用量 产量 

分 类 号：S562.062[农业科学—作物学]