几种蔬菜的钾肥效应研究

Study on the K Fertilizer Responses of Vegetables

不同蔬菜在不同土壤上的施钾效应研究结果表明：施用钾肥，能促进蔬菜植株的生长，显著提高产量。在一定钾肥用量范围内，产量随钾肥水平提高而提高，超过一定量时，产量并不增加。钾素营养能提高果实中 Ｖｃ 和全糖的含量，改善贮藏特性。 Ｖｃ 含量的提高效应与产量效应一致，但糖分的含量在稍低钾素水平上出现。由于产量提高和品质改善的效应，施钾经济效益十分显著，产投比大。

The results of researches on the K responses of vegetables in different soils indicated that the application of K fertilizer promoted the growth of vegetable plant,and increased the yield significantly within certain range of K rates.The yield increased as the K rate increased, and did not increase while K rate beyond certain rate. K nutrition could increase the Vc and sugar content of vegetable fruit,improved the storage characteristic. The increment of Vc content was similar with the increases of yield,but the maximum sugar content appeared at the lower k rate.Because of the effect on yield and quality improvements,the economic efficiency of K application was significant.Output/input ratio of K fertilization were large.