水肥耦合对春小麦群体叶面积及产量的影响

Effect of Water and Fertilization Coupling on Population Leaf Area and Yield of Spring Wheat

利用可精确控制水分条件的水肥平衡场,在不同水肥耦合处理的条件下,分析了水肥耦合对春小麦生殖生长期群体叶面积及产量的影响。结果表明:在灌溉条件下,无机肥增施有机肥处理叶面积指数(LAI)较无肥和仅施用无机肥处理分别增加76 9%和45 5%,叶面积持续期(LAD)分别延长85 9%和53 5%,光能利用率分别提高51 4%和26 2%,产量分别提高38 3%和20 4%;在非灌溉条件下,无机肥增施有机肥处理叶面积指数(LAI)较无肥和仅施用无机肥处理分别增加59 6%和7 1%,叶面积持续期(LAD)分别延长56 3%和9 5%,光能利用率分别提高46 9%和11 9%,产量分别提高28 4%和4 1%。增施有机肥对提高产量的促进作用明显。

<Abstrcat> In this study, using plots with different levels of water and fertilizer fully controlled,we analyzed the effect of water and fertilizer on leaf area of population during filling period and grain yield of spring wheat. The results showed that under irrigation condition, compared with no-fertilizer and fertilizer treatment, the application of chemical fertilizer with manure improved leaf area index (LAI) by 76.9% and 45.5%, leaf area duration (LAD) by 85.9% and 53.5%, solar energy using efficiency by 51.4% and 26.2% and grain yield by 38.3% and 20.4%. Under non-irrigation condition, compared with no-fertilizer and fertilizer treatment, the application of chemical fertilizer with manure improved leaf area index (LAI) by 59.6% and 7.1%, leaf area duration (LAD) by 56.3% and 9.5%, solar energy using efficiency by 46.9% and 11.9%, and grain yield by 28.4% and 4.1%. Therefore, the application of manure with chemical fertilizer increased yield significantly.