钾营养对保护地番茄氮钾吸收及植株生育的影响  

Effects of Potassium Fertilizer on Nutrients Absorption and Growth of Tomato in Greenhouse

作　　者：孙红梅[1] 李天来[1] 须晖[1] 郭泳[1] 范文莉[1] 

机构地区：[1]沈阳农业大学园艺系,110161

出　　处：《中国蔬菜》2001年第4期14-16,共3页China Vegetables

基　　金：国家科技部"九五"重大产业化项目攻关课题资助项目(96-012-03)

摘　　要：采用无土栽培的方式研究了钾肥不同浓度对保护地番茄氮钾吸收及植株生育的影响。结果表明：提高营养液中钾的浓度有利于番茄植株的生长，高钾处理的生长函数在生育中后期仍呈现最佳状态。在K3水平(K浓度为630.6mg·L-1)，植株各器官及全株的钾含量达到最大值，产量也显著提高。进一步增大营养液中的K浓度达K4(K=896.2mg·L-1)水平时，植株对钾的吸收下降，增产量也降低。适度的钾营养促进番茄对氮的吸收。根中的氮随着施钾的增多呈下降趋势。果实白熟期番茄植株中钾素的分布为果＞茎＞叶＞根；氮素的分布呈果＞叶＞茎＞根的趋势。Increasing of K level of nutrient solution improved the growth of tomato. The LAI，NAR，CGR of the highest K treatment was the best in middle and later growth stage. The K content of plant and the yield were the highest in K3 treatment （K=630mg·L-1）. The appropriate K improved the n utrient absorption. The K，N content of plant and the yield were decreased in th e highest K level treatment. At the fruit ripening stage，the distribution of K content was fruit＞stem＞leaf＞root and the distribution of N content was fruit ＞leaf＞stem＞root.

关 键 词：番茄 钾肥 氮钾吸收 生长 产量 无土栽培 

分 类 号：S641[农业科学—蔬菜学]