土壤有效钾含量及钾肥用量对西瓜生长的影响  

Effects of available potassium in soil and potassium fertilizer application on the growth of watermelon

作　　者：尤春[1] 孙兴祥[1] 

机构地区：[1]盐城市蔬菜研究所,江苏盐城224000

出　　处：《中国瓜菜》2016年第9期26-30,共5页China Cucurbits And Vegetables

基　　金：国家现代农业产业技术体系建设专项资金(CARS-26-29);江苏省农业科技自主创新资金项目cx(15)1018;苏北科技专项(BN2015098)

摘　　要：为了研究不同土壤有效钾含量下,施用钾肥对大棚西瓜品质及产量的影响,试验以‘早佳’西瓜为材料,历时2年时间,选择土壤有效钾含量不同的8个试验点,设定4~5个处理,对植株长势、果实品质及产量进行比较。结果表明,施用钾肥对西瓜有促进生长、提高含糖量、增加产量的效果。土壤有效钾质量分数低于200 mg·kg^(-1)的地区,667 m^2施K_2O 10 kg,长势好,品质优,单果质量、产量增加明显。有效钾质量分数高于200 mg·kg^(-1)的地区,667 m^2施K_2O 5~6.7 kg,有利于改善品质,对产量提高无明显作用。In order to study the effect of potassium fertilizer application on the quality and yield of watermelon in greenhouse under different available potassium gradient in soil, the watermelon variety ＇Zaojia＇ was adopted as material to study the plant growth, fruit quality and yield at 8 experiment points for 2 years. At each point, 4-5 treatments were set up. The results showed that the growth, sugar content and yield was promoted under the application of potassium fertilize. When available potassium in soil was lower than 200 mg·kg-1, the fruit weight and yield were increased significantly by using K20 of 10 kg per 667 m2. When available potassium in soil was higher than 200 mg·kg-1, the fruit quality was increased significantly by using K20 of 5-6.7 kg per 667 m2 but the yield was not improved.

关 键 词：西瓜 大棚 土壤有效钾 钾肥 

分 类 号：S651[农业科学—果树学]