水肥一体化条件下马铃薯氮肥精准施用

Precise Application of Potato Nitrogen Fertilizer Under the Condition of Water and Fertilizer Integrated Management

为探索水肥一体化条件下,不同氮肥用量对马铃薯生长、产量及经济效益的影响,本研究选用尤金为供试马铃薯品种,以膜下滴灌水肥一体化为核心技术,开展了马铃薯氮肥精准施用技术试验。结果表明:当纯磷(P2O5)和纯钾(K2O)施用量分别为120和270 kg·hm^(-2)时,马铃薯产量随施氮量的提升表现为先升后降的趋势,施氮量为189.24 kg·hm^(-2)时,产量达最高值52754.79 kg·hm^(-2);最佳经济施氮量为184.38 kg·hm^(-2),所对应的最佳产量为52749.15 kg·hm^(-2),与最高产量差异不显著。因此,在本试验条件下,马铃薯适宜的氮肥用量应控制在184~190 kg·hm^(-2),可获得较高的产量和经济效益。

In order to explore the effects of different nitrogen application rates on potato growth,yield and economic benefits under the condition of water and fertilizer integration,the study on precision application technology of nitrogen fertilizer for potato was carried out.In the study,Youjin was selected as the test variety and the core technology was the integration of water and fertilizer under film drip irrigation.The results showed that potato yield was firstly increased and then decreased with the increase of nitrogen application under the conditions of 120 kg·hm^(-2)(P2O5)and 270 kg·hm^(-2)(K2O).When the application rate of nitrogen was 189.24 kg·hm^(-2),the yield reached the highest value of 52754.79 kg·hm^(-2).The optimum amount of nitrogen fertilizer was 184.38 kg·hm^(-2),and the corresponding yield was 52749.15 kg·hm^(-2).The two yield showed no significant difference.Therefore,under the experimental conditions,the suitable application rate of nitrogen fertilizer for potato should be controlled within 184-190 kg·hm^(-2)for the higher yield and economic benefits.