遮光对香根草生长发育的影响研究

香根草Vetiveria zizanioides移栽后采用不同遮光率的遮阳网遮盖,结果表明:1)移栽后约2个月香根草存活率才基本稳定,遮光对香根草成活率无显著影响;2)移栽后2个月内遮光对香根草分蘖影响不显著,但2个月后遮光对分蘖有显著影响;3)生长前期遮光对香根草株高无显著影响,但在生长后期,过度遮光会显著地影响株高的伸长;4)遮光会影响香根草根茎比,但这种影响比较复杂,会随生育时期的变化而改变。

Effects of shading on growth and development of Vetiveria zizanioides

Vetivers(Vetiveria zizanioides) were shaded with black plastics nets of different shading rates after they had been transplanted. The test shows: 1)shading has not significant effect on survival percentage of vetiver,and all vetiver survival percentages remain stable until about two months later after their being transplanted;2)there is no significant effect on tillering when vetiver is shaded in the early two months after its being transplanted,but two months later,shading has significant effect on tillering;3)in early stage of growth period,shading has no effect on height of vetiver,however in the later stage of growth period,if much shading there is significant effect on height of vetiver;4)shading has effect on root-shoot ratio of vetiver,but the effect is quite complicated,and it also changes along with growth stage of vetiver.