不同海拔烟区覆膜天数对土壤温度及烟株生长的影响

目的]研究铜仁地区不同海拔烟区覆膜天数对土壤温度及烟株生长的影响。方法]以海拔高度为主因子,盖膜及揭膜时期为副因子,采用随机区组设计,研究铜仁地区德江县600(龙泉)、800(川岩)、1 000 m(高山)海拔烟区地膜烟不同盖膜天数对烤烟生长发育及产量、产值的影响。结果]在海拔600和800 m烟区最佳揭膜时间为35 d左右,即栽后35 d揭膜能促进烟株早生快发,提高烟叶产量和产值;海拔1 000 m地区最佳揭膜时间为移栽后50 d左右,烟叶产量和产值上升,品质较好。结论]该研究可为铜仁地区不同海拔烟区推广烤烟地膜覆盖栽培提供参考。

Effects of Different Mulching Days on Soil Temperature and Tobacco Plant Growth in Different Altitude Area

Objective ] The aim was to study the effects of different mulching days on soil temperature and tobacco plant growth in different al- titude area of Tongren Area. Method] Taking altitude as primarily factor, and covering film and film period as the secondary factor, the in- fluences of different mulching days on growth, development, yield and output value of tobacco in the altitude of 600（ in Longquan）, 800（ in Chuanyan） and 1 000 m（in Gaoshan） in Dejiang Country of Tongren Area were studied by randomized block design. Result] The results showed that at the tobacco area of the altitude of 600 and 800 m the best film uncovering time was about 35 days after filming, which promoted tobacco plant growing quickly, and improved tobacco leaves＇ yield and output＇ value. At the tobacco area of the altitude of 1 000 m, the best film uncovering time was about 50 days after filming, which tobacco leaves＇ yield and output value increased, and quality was good. Conclu- sion] The study provides a reference for promotion of flue-cured tobacco mulching cultivation at different altitude area of Tongren Area.