CAJ | 학술논문

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K2 O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。
위연구로서북지구항충면시용갑비적증산효과급해지구적최가갑비시용량，재덕주시량충장、무성현서위촌진행료대전시험。결과표명，일시시갑비가이현저제고면화산량，덕주화무성적시류산갑（함K2 O위50％）300 kg/hm2비불시갑비분별증산22．1％화23．9％；이시시갑비가증가상부과지화외위절위적성령수화령중；삼시당토양속효갑함량위70～105 mg/kg시，로서북지구면전비교괄의적류산갑시용량위120 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 .