覆盖地膜栽培烤烟地的杂草防除研究

STUDIES ON WEED CONTROL IN TOBACCO FIELDS UNDER PLASTIC FILM MULCHING

作者于1992～1995年对盖透明膜烟地杂草发生规律、化学除草和覆盖有色膜控草进行了研究。烟地以一年生杂草为主。灌水后盖膜,杂草发生多集中在盖膜后10～20天,发生率达64.6％,而不盖膜的同期只发生17.8％,直到下透雨烟苗移栽60天后才出现明显的高峰,说明杂草萌发与土壤水分关系密切。试验筛选出高效、经济的除草剂及其用量等应用技术,并进行了示范验证。试验和示范结果表明,深黑膜控草效果最好,达90％以上。

In this paper the regularity of weed occurrence, a set methods of chemical control for weed in tobacco fields covered with colourless film and the control efficiency was compared between different colour film mulching during 1992 - 1995. The main species of annual weed in tobacco fields, and their occurrence rate was found to be has closely related with soil moisture content, the concentric occurrence of weeds was at the date of 10-20 days after film mulching (occurrence rate, 64. 6%) when the soil was irrigated. At the same time in film uncovered area the weed occurrence rate was 17. 8%. Seedling emergency peak arised at the date of 60 days after tobacco seedlings transplanting until rain. In these trials, a good herbicide was found and had been demonstrated to have the efficiency higher than 85%; dark black film mulching had better efficiency (over 90%).