不同覆盖方式对烟苗根系生长及耕层生态环境的影响  

Effects of different mulching on root growth and soil environment of tobacco

作　　者：吕强[1] 熊瑛[1] 陈明灿[1] 付国占[1] 李友军[1] 

机构地区：[1]河南科技大学农学院,河南洛阳471003

出　　处：《干旱地区农业研究》2008年第1期86-89,105,共5页Agricultural Research in the Arid Areas

基　　金：河南省科技攻关项目(0424060032)

摘　　要：研究了塑料地膜覆盖（DM）、液体地膜覆盖（YM）和露地栽培（CK）3种栽培方式对烟苗根系生长及耕层生态环境的影响，结果表明：移栽后5～45d，5～20cm不同耕层，3种方式对地温的影响均表现为DM〉YM〉CK；DM的保水效应在0～10cm表耕层较为突出，10～20cm耕层及20～30cm耕层DM和YM差异不大，而深层土壤（30～40cm）则YM高于DM和CK；移栽后30d、45d，烟株地上部总干重、根总干重、根冠比、一级侧根数量、二级侧根数量、一级侧根粗和茎基部伤流强度均表现为DM〉YM〉CK，3种栽培方式间差异均达极显著水平；液体地膜覆盖烟株根系最长，极显著高于DM和CK。Effects of the plastic film mulching （DM） and tiquid-film mulching （YM） and open ground （CK） on root growth and soil environhlent of tobacco were studied, using flue-cured tobacco variety of NC89. The results showed： Influences of three kinds of mulching on ground temperature from 5 cm to 20 cm soil layer were all showed： DM 〉 YM 〉 CK, 5--45 days after being transplanted. The effects of DM, s mulching on retaining water were more outstanding in 0--10 cm soil layer. The differences were no evident between DM and YM in their 10--20 cm soil layer and 20--30 cm soil layer, but water content in deep-seated （30--40 cm） soil layer for YM was higher than DM and CK. Many characters of tobacco root system were represented DM 〉 YM 〉 CK, including entire dry- weight of aboveground, dry-weight of roots per plant, root/shoot ratio, the number of the first lateral roots per plant, the number of the second lateral roots per plant, the first lateral root thick and bleeding intensity of basal internodes. The roots of YM Were much longer than the treatments of DM and CK.

关 键 词：液体地膜覆盖 塑料地膜覆盖 烟苗根系 耕层生态环境 

分 类 号：S572.01[农业科学—烟草工业]