不同供钾水平对西瓜产量和品质的影响

Effect of Different Potassium Supply Levels on Yield and Quality of Watermelon

以京欣1号为材料,利用田间试验,设计5个不同用量的处理,对不同供钾水平对西瓜产量和品质的影响进行了试验。结果表明,增施钾肥,能显著提高单瓜重量,从而提高产量。在一定的范围内,随着K2O用量的上升,西瓜产量增加,但当每公顷K2O用量达到360 kg以后,西瓜产量开始呈下降趋势;钾用量越大,可溶性糖含量越高,但到一定的量后,增加趋势渐缓;增加钾肥有提高维生素C含量的趋势,总的趋势是用量越大,含量越高;钾能显著降低西瓜硝酸盐含量,随着钾用量的增加,硝酸盐含量明显降低。综合产量和几个品质指标,本试验条件下,K2O用量480 kg.hm-2对提高西瓜产量和品质最为有利。

The field experiment was conducted to study effect of different supply amount of potassium on yield and quality of watermelon. The results showed that potassium can increase the weight of watermelons significantly ,and raise yield of watermelon. With the increased amount of potassium,watermelon production added,but to a certain volume,a low trend started; content of soluble sugar was increased with amount of potassium added ,but to a certain volume, the increasing trend was not clear; vitamin C content can be increased with amount of potassium added;and potassium have a great impact on content of nitrat, it was lowed significantly with amount of potassium added. 480kg·hm^-2 K2O is more appropriate to add yield and improve quality in this test.