液体地膜覆盖对烟苗生长发育的影响

研究了塑料地膜覆盖(DM)、液体地膜覆盖(YM)和露地(ck)3种覆盖方式对烟苗生长发育的影响,结果表明,移栽后30 d,45 d,烟株各部位展开叶叶片长宽及叶面积、地上部总干重、根干重、一级侧根数量、二级侧根数量、一级侧根粗、茎基粗和根系活力均表现为DM>YM>ck;液体地膜覆盖在协调烟株地上部与地下部生长关系上作用显著,移栽后30 d 3种覆盖方式的根冠比表现为YM>ck>DM,移栽后45 d的根冠比表现为ck>YM>DM。液体地膜覆盖可以显著促进烟株根系的纵向生长,提高根系活力和抗逆性,防止早衰,是一种清洁、方便、无污染、无残留的新型覆盖材料。

Effects of Liquid Film Mulching on the Growth and Development of Tobacco Seedlings

Effects of the plastic film mulching(DM),liquid-film mulching(YM) and open ground(ck) on the growth and development of flue-cured tobacco variety NC89 were studied.The results showed that DM>YM>ck for all the morphological and physiological characters of tobacco tested after 30d and 45d of transplanting,including the leaf blade length,breadth and areas,the entire dry-weight above ground,the dry-weight of roots per plant,the numbers of first and second lateral roots per plant,the diameter of first lateral root,the stem-base thickness and root activity.Liquid-film mulching had significant effects on coordinating the growth relations between the aboveground and underground of tobacco.The root/shoot ratio was YM>ck>DM after 30d of transplanting,and ck>YM>DM after 45d.YM could greatly promote the longitudinal growth of root,enhanced the root activity and stress resistance,and prevented the early aging.Liquid-film was a new, clean and no-pollution mulching material.