摘要
1992～1994年,进行有色地膜覆盖烟地的控草、增温、保水效果试验,示范证明覆盖各种有色膜的地块杂草发生量比对照(盖透明膜显著减少.深黑膜的控草效果达95%以上,与施50%乙草胺乳油1500ml/hm^2加盖透明膜的效果相似).地膜颜色愈深,控草效果愈好,顺序为黑色>兰色>黄色.有色地膜和透明地膜一样有增加地温的作用,深黑膜早(8:00)晚(20:00)平均地温比透明膜高0.178℃,而午间(14:00)地温却低0.256℃,说明深色膜更能保存土壤热量,可避免极端高温对烤烟生长的不利影响.盖膜烟地保水性能也随地膜颜色的加深的加深而增强.深黑地膜覆盖烟地比透明地膜增产干烟叶1.57%,增值5.46%.
Field experiments and demonstration were conducted during 1992-1994. It was proved that the colour film mulching was more effeciem in weed control than CK (mulchingg with transparent plastic film). Dark black film,in which the weed control rate was over 95%,had a similar weed control result to appling 50% of Acetochlor at a dosage of 1500ml/hm2. The darker in colour,the higher in weed control rate. The sequence was dark black>blue>yellow. As for the effects on soil tem perature the coloured plastic film was almostt same as the transparent plastic film,the dark black film was even better in keeping soil temperature and moisture. It would increase 1. 57% of dry weight,5. 46% of tobacco output value,compared with transparent plastic film mulching.
出处
《西南农业学报》
CSCD
1995年第1期90-93,共4页
Southwest China Journal of Agricultural Sciences
