不同灌溉条件对甘蓝生长、水分利用效率和产量的影响

Effects of Different Irrigation Conditions on Growth and Water Use Efficiency and Yield of Cabbage

甘蓝苗期结束时浇一水,会延长莲座期,缩短结球时间。只在结球前期浇一水可比对照节水39.75 mm,增产8.7%,水分利用效率提高23.38%,根重密度提高8.3%,而叶球的干物质、可溶性糖和蛋白质积累高于对照,但与对照无明显的差别。同时,地膜覆盖条件下浇三水和不浇水都不利于产量形成,也达不到节水高产的效益。

Effect of different irrigation conditions on growth, yield, water use efficiency, water consuming, dry weight, root density, soluble protein and sugar of cabbage under plastic film mulch were studied. The results showed that the leaf growing period was postponed and shaping leaf ball period was shortened under one irrigated condition when seedling period was over. The yield of G4 treatment can be increased 8.7%, water was saved 39.75 mm, water use efficiency, root density was increased 23.38% and 8.3%, respectively. But dry weight, the contents of soluble protein and sugar of head were superior to that of the contrast with no significant difference. Excessive irrigating or no irrigating could not save water, achieve high yield and improve economic benefit.