关键词: 玉米叶 苹果 人工饲料 亚洲玉米螟 实验种群生命表, 玉米叶 苹果 人工饲料 亚洲玉米螟 实验种群生命表

Abstract:

In order to solve the problem of low soil moisture of tobacco field’s ridge during transplanting season and saving seedlings as well as promoted the tobacco plants to grow rapidly in Kunming Flue-cured Tobacco Area. We adopted randomized block experiment in Yanglin, Songming Country of Kunming City to study the effect that the drought-resistance techniques such as film mulching, straw mulching, film mulching with water retaining agent, straw mulching with water retaining agent, double mulch with film before and straw after, water retaining agent and no film mulching have on the agronomic and economic characters of flue-cured tobacco. The experiment result showed that: (1) double mulch with film before and straw after, plastic mulch + SAP, straw mulch + SAP, all these could improve the environmental condition of tobacco growth, effectively reduced the drought stress of tobacco in early growth period, and promoted tobacco growth as soon as possible, also increased the production, output value and quality, among the best was double mulch with film before and straw after. (2)For applying SAP, straw mulch while covering with film, transplanting, the drought resistance would weaken as the extended drought time. (3) Tobacco without drought resisting measurements not only grew slowly, but both of the economic and agronomic traits were the worst.