氯化钾对西瓜产量及氯离子残留量的影响

Effect of KCl application on watermelon production and residual chlorine ion amount

通过在干旱区西瓜上施用KCl肥料试验表明，K2O用量170—19kg／hm^2时，西瓜产量最高。在等养分基础上，KCl与K2SO4增产效果相当，但KCl经济效益更为显著；适量施用KCl可提高西瓜产量与品质；KCl肥料中的氯离子在于早区土壤累积比较严重，而对西瓜植株基本无影响。

The trials of KCl applied on watermelon were carded out in arid area. The result showed that yield of watermelon was the highest when it was applied with N, P and K at ratio of 1 ： 1 ： 1. 1 -1.3, in addition of K20 170 - 190 kg/ hm^2. KCI and K2SO4 had the same effect on increasing watermelon yields, under the same nutrients condition, but economic benefit was more remarkable. Application of KCl with limited amounts can not only raise watermelon production but improve their quality. Chlorine ion of KCl fertilizer had less influence to the properties of physics and chemistry of soil while nearly no influence to watermelon plants.