膜下滴灌水肥耦合对半干旱区玉米生长发育及产量的影响

在田间条件下,采用水肥一体化的施肥模式对覆膜玉米水氮耦合效应进行研究,明确水氮耦合对吉林省西部玉米生长的影响,提出最佳灌水量和施氮量。研究结果表明,水、氮在一定范围内配合表现出明显的正交互作用,促进玉米的生长发育;施氮量超过一定范围将产生负效应,对玉米的生长发育及产量起到一定的抑制作用。在吉林省西部施氮量280 kg/hm~2、灌水量500 mm为最佳水氮组合,玉米株高、叶面积指数、生物量与其他处理间存在显著性差异;产量最高,比不施氮处理增产36.1%。

Effects of Combinations of Water and Nitrogen on Growth and Yield of Drip Irrigation under Plastic Film Mulching Maize in Western Jilin Province

In order to clarify the effects and optimal level of combinations of nitrogen and water on maize growth in western Jilin province, the effects of that on plastic film mulching maize were researched. The results showed that the amount of water and nitrogen within a certain range showed obvious positive interaction, promote the growth and development of maize, and N application rate over a certain range will produce negative effects, growth and yield of maize have certain inhibition. In the west of Jilin province, the N3W2(N application rate of 280 kg/ha, irrigation water, 500 mm) were the best combination of water and nitrogen, maize plant height, leaf area index and biomass had significant differences with other processing. The yield of N3W2 was the highest, increase 36.1% than N0W1.