蔬菜轮作的钾肥效应研究

Study on the Response of Vegetables to K-fertilizer under Continuous Rotation of Vegetables

对番茄—花菜—辣椒轮作制度的钾肥效应研究表明 :施用钾肥能显著提高蔬菜的产量和品质 ,花菜可增产 9.4%～2 3 % ,辣椒可增产 6 .3 %～ 16 .3% ,以施用 12 0kg/hm2 K2 O的增产幅度最大。施用钾肥同时改善了花菜和辣椒的品质 ,提高了Vc和糖分的含量。钾肥还能促进花菜和辣椒对氮。

The experiment in the effect of K-fertilizer on the rotation of tomato-cauliflower-green pepper indicated that K fertilizer could significantly increase the vegetables yield, and improve their qualities. Application of K fertilizer increased the cauliflower yield by 9.4-23% comparing with the control, and 6.3%-16.3% for green pepper. The maximum yield of test vegetables could be reached at the rate of 120～150kg K 2O/hm 2. At same time, the application of K fertilizer improved the quality parameters of cauliflower and green pepper, such as the increment of Vc and sugar content. K fertilizer could enhance the uptake of N and K element.