不同钾营养水平对西瓜产量及品质的影响

Effects of Different Potassium Levels on Yield and Quality of Watermelon

【目的】通过对西瓜施用不同量的钾肥,研究钾营养对西瓜产量及品质的影响。【方法】在N 135 kg/hm2、P2O5105 kg/hm2的基础上施用不同量的氯化钾。【结果】不同钾肥用量对西瓜农艺性状、产量、产品品质及经济效益均有不同程度的影响。随着钾肥施用量的增加,施钾可增产5 569-9 915 kg/hm2,增幅12.1%-21.5%,增收3 161-4 869元/hm2,并显著提高西瓜果实VC含量46.6%-76.4%;果实膨大期西瓜的钾素吸收量占整个生育期的60%左右,钾肥最大利用率高达70.1%。【结论】钾肥对西瓜生长发育有着非常重要的影响,应结合西瓜各生育期特点来合理施用。

【Objective】The experiment was conducted to study the effects of potassium on yield and quality of watermelon,through the different applications of Potassium.【Method】Appling N 135 kg/hm2 and P2O5 105 kg/hm2 with different amount of Potassium Chloride（KCl）.【Result】The results indicated that different potassium fertilizer had different effects on agronomic characters yield,quality and economic benefit of watermelon.With the increasing of application rate of potassium fertilizer ,yield of watermelon increased by 5 569-9 915 kg/hm2,increase amplitude was as high as 12.1%-21.5%,income raised by 3 161-4 869 yuan/hm2,which significantly promoted VC content of watermelon by 46.6%-76.4%,during the fruit expanding process the uptake of watermelon was about 60% of the total uptake.The maximum use efficiency of potassium fertilizer was 70.1%.【Conclusion】So that,potassium fertilizer played an important role in the growth and development of watermelon.