不同海拔高度地膜揭膜时间对烤烟生长影响的研究

Effects of Different Film Revealing Time at Different Altitudes on Tobacco Growth

在陕西省旬阳县选择不同海拔高度(620 m、886 m、1 103 m),设置烟苗移栽后30、40、50 d揭去地膜及全生育期不揭膜处理,对烤烟生育期、农艺性状、病害发生程度、经济性状的影响进行了研究,以筛选不同海拔高度条件下最适揭膜时间。结果表明:在旬阳县,海拔高度900 m以下揭膜时间为移栽后40~50 d,而在海拔高度900 m以上生长正常的烟田则可以不揭膜。

In order to select optimum film revealing time for tobacco planted at different altitudes(620 m, 886 m and 1 103m), it studied the effects of treatment with film revealing at 30, 40 and 50 d after transplanting of tobacco seedlings and treatment with non film revealing in whole growth period of tobacco on tobacco growth period, agricultural characteristics,occurrence degree of disease and insect pests and economic characters at different altitudes in Xunyang County of Shanxi Province in 2011. The results showed that in Xunyang County, the optimum film revealing time was 40 ~50 d after transplanting for tobacco field at altitude below 900 m; for the tobacco filed at altitude above 900 m, it could do not reveal film if tobacco plants grow in a good condition.