应用生态学报2001，Vol.12Issue(2)：205-209,5.
半干旱地区地膜覆盖对作物产量和氮效率的影响
Effect of plastic film mulching on crop yield and nitrogen efficiency in semiarid areas.
摘要
Abstract
The effect of plastic film mulching, water storage in soil profile before sowing, and nitrogen fertilization on crop yield
and nitrogen efficiency was examined in this paper. The study site was on the cultivated lo,sial soil in semiarid areas
with 415mm of annual rainfall and the test crop was spring wheat, Triticum aestivum. In order to study the effect of
plastic film mulching, 4 levels of mulching were designed, including mulching of 0, 30 and 60 days after sowing and
mulching over the whole growing period. The results showed that increase of soil water storage, plastic film mulching
and nitrogen fertilization increased crop yield significantly(a＜ 0.01 ), and their effect followed in the order of nitrogen
fertilization ＞ increase of water storage＞plastic film mulching. The effect of mulching on crop yield varied with water
storage, nitrogen fertilization and mulching periods. When the water storage was low, there was no significant difference
in crop yield between mulching and no mulching, although mulching increased crop yield slightly, and the nitrogen effi
ciency was higher for no mulching and mulching 30 days. When the water storage was high, the difference between the
yield of muching 60 days and no mulching was significant, but no difference in nitrogen efficiency was found for
mulching 30 days, 60 days and over whole growing period. It was suggested that mulching over whole growing period
was of less significance in practice.
关键词
旱地 地膜覆盖 作物产量 N效率分类
农业科技引用本文复制引用
李世清,李凤民,宋秋华,王俊..半干旱地区地膜覆盖对作物产量和氮效率的影响[J].应用生态学报,2001,12(2):205-209,5.
