以陇亚10号为指示品种，观察了不同地膜覆盖条件下胡麻田杂草的发生规律。结果表明，覆盖白色地膜时，胡麻田杂草出苗早、密度高。其中5月26日至6月24日期间杂草生长快，对胡麻生长发育有严重影响。覆盖黑色地膜时，胡麻田杂草均分布在种植穴周围，密度低、生长较慢，5月15日前对胡麻幼苗生长影响不大；5月26日至6月24日期间杂草生长快，对胡麻正常生长发育有影响。露地胡麻田杂草密度明显高于覆盖黑色地膜胡麻田杂草，但不及覆盖白色地膜胡麻田，且生长较慢；5月15日之前对胡麻幼苗生长影响不大，5月26日至6月24日期间杂草密度较高且生长快，对胡麻正常生长发育有严重影响。综合分析认为，覆盖黑色地膜结合种植穴覆土，是胡麻田杂草有效的物理防除措施。

Using Longya 10 as the indicator cultivar， the occurrence regularity of weeds in linseed field under different mulching conditions was observed. The results show that weeds emergence were early， density was high and growth was fast in linseed field of white film mulching. The fast growth of Weeds had a serious effect on normal growth and development of linseed from May 26th to June 24th. Weeds in linseed field of black film mulching were distributed around the planting hole， density was low and growth was slow. The effect on growth of seedlings of linseed was small before May 15th. The fast growth of weeds had effect on normal growth and development of linseed from May 26th to June 24th. Weeds density in linseed field of open ground was higher than that of black film mulching， but lower than that of white film mulching， and weeds grew more slowly， their effect on growth of seedlings of linseed was small before May 15th. The high density and fast growth of weeds had a serious effect on normal growth and development of linseed from May 26th to June 24th. Comprehensive analysis shows that mulching black film combined with covering soil around the planting hole is the effective physical and artificial weeds control measures.

S563.2；S451.1

现代农业产业技术体系专项资金(CARS-14-1-22)资助。