【摘要】 [目的]研究甘蓝高产的钾肥施用技术。[方法]以甘蓝品种"春甘8398"为试材,设置了2个氮肥(N)水平(225、300 kg/hm2)和3个钾肥水平(0、225和338 kg/hm2)共5个处理。收获时调查了甘蓝的株高、叶片数、展开度、单球重、叶重、根重、单株生物量和净菜率。[结果]在施用氮磷肥的基础上增施钾肥,能明显促进春甘蓝的生长发育。施钾量在338 kg/hm2以下时,株高、单球重、根重、生物量和净菜率随着钾肥施用量的加大逐渐增加。1999年施钾平均增产33.8%,2001年施钾平均增产27.7%。施用钾肥处理平均增收2 190~3 090元/hm2,施用钾肥的产投比达3.85~5.19∶1。[结论]施用钾肥能大幅度提高甘蓝产量与经济效益。更多还原

【Abstract】 [Objective] The study was to investigate the technique of K fertilizer for high yield in cabbage.[Method] With the cabbage variety Chungan 8398 as tested material,5 treatments of N fertilizer with 2 levels(225,300 kg/hm2) and K fertilizer with 3 levels(0,225 and 338 kg/hm2) were designed.The plant height,number of leaf,degree of outspread,weight per ball,leaf weight,root weight,biomass yield per plant and net vegetable rate were measured in harvest stage.[Result] Applying K fertilizer on the base of N and P fertilizers could significantly increase the growth of cabbage in spring.When K fertilizer was applied below 338 kg/hm2,the plant height,weight per ball,root weight,biomass yield per plant and net vegetable rate were increased with the increment of K fertilizer dosage.The average yield in treatment applied K fertilizer was increased by 33.8% in 1999 and by 27.7% in 2001.The treatment of applying K fertilizer could increase 2 190-3 090 yuan/hm2 in average and make the output-input ratio of 3.85-5.19∶1.[Conclusion] Applying K fertilizer could greatly increase the cabbage yield and economic benefit.更多还原