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在呼和浩特市开展设施黄瓜氮肥不同用量试验,研究氮肥对黄瓜产量以及体内硝酸盐和亚硝酸盐含量的影响,结果表明,氮肥用量125 kg/667m~2对于提高黄瓜产量来说是一个最佳的氮肥施用量。在氮肥用量为50~100 kg/667m~2时,氮肥用量与黄瓜硝酸盐及亚硝酸盐成正相关关系,在氮肥用量100~125 kg/667m~2时,黄瓜硝酸盐和亚硝酸盐含量相对较低,是比较适宜的氮肥用量;在综合考虑经济合理产量和良好品质的同时,兼顾最大肥料利用率,减少环境污染,可以得到目标产量8 000 kg/667m~2下,氮肥用量100~125 kg/667m~2为设施栽培黄瓜最佳的合理施肥量。
The effects of nitrogen fertilizer on cucumber yield and nitrate and nitrite content in cucumber were studied in different cucumbers of cucumber in Hohhot. The results showed that nitrogen fertilizer 125 kg / 667m ~ 2 was the best for cucumber yield Nitrogen fertilizer application. When the amount of nitrogen fertilizer was 50 ~ 100 kg / 667m ~ 2, the amount of nitrogen fertilizer had a positive correlation with the nitrate and nitrite of cucumber, and the nitrate and nitrite contents of cucumber were the same when the nitrogen fertilizer was 100 ~ 125 kg / 667m ~ Low, it is more suitable nitrogen fertilizer dosage; Considering economically reasonable yield and good quality at the same time, taking into account the maximum fertilizer utilization, reduce environmental pollution, can get the target output of 8 000 kg / 667m ~ 2, the amount of nitrogen fertilizer 100 ~ 125 kg / 667m ~ 2 is the best reasonable fertilization amount for cucumber cultivation.