In order to solve the problem of irrational fertilization, experiment was carried out in paddy rice, it include four irrigation technology: controlled irrigation, wetting irrigation, intermittent irrigation, shallow irrigation, and five fertilizer levels, three times repetition. It shows that: upper limit of fertilizing amount of the highest yield was 360 kg·hm-2; upper limit of fertilizing amount of maximal economic benefit was 320 kg·hm-2. Fertilizer ratio of N, P, K 2:1:1.5 should be used in paddy rice, and fertilizer amount should be controlled less than 320 kg·hm-2. According to the situation of lack of kalium fertilizer, and soil total kalium fertilizer relative amount is high, it should be use the fertilizing method that reducing fertilizing amount in proportion or reducing kalium fertilizer amount.%为解决水稻生产中不合理施肥现象,采用控灌、湿润灌、间歇灌、浅晒浅灌4种水稻节水灌溉技术,5个施肥水平组合,3次重复试验.结果表明,产量最高施肥量上限值为360 kg·hm-2;经济效益最大施肥量上限值为320 kg·hm-2.目前水稻耕作水平条件下氮、磷、钾施肥比例关系宜采用2∶1∶1.5,施肥量控制在320 kg·hm-2以下.由于我国现有的钾肥供应能力不足和土壤全钾背景含量相对较高的特点,建议在水稻生产中可采取比例降低施肥总量或适当降低钾肥用量方法.
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