平茬更新代次对杞柳生长及柳条产量和质量的影响

选择淮河低湿地不同平茬更新代次的杞柳林分,对其生长情况及柳条产量、质量进行调查,并对平茬更新代次的影响进行评价。结果表明:0～4代杞柳林分在叶面积指数、柳条平均直径和长度以及生物量方面均不存在显著差异;1代林分柳条分化严重,整齐度低,细弱型柳条(D<0.4 cm)比例达44%,需要在栽培过程中加以人工调控;4代林分柳条的整齐度较高,但产条数量较0～2代林分低20%以上,并且粗大型柳条(D>0.8 cm)所占比例略高于其他代次,建议在生产中采用1年2次收获的方式以增加中细型柳条的产量。

Effects of harvest rotation on the growth, wicker production and quality of willow shrub

In this study,the willow shrub plantations with different harvest rotation were selected to investigate the growth status and the wicker production and quality,thus the effects of harvest rotation were evaluated in the low land along Huaihe riverside.The results indicated that no significant differences were found in leaf area index(LAI),average diameter and length of wicker and biomass among the plantations of the rotation 0 to rotation 4.The plantation of rotation 1 presented lower uniformity degree as compared with other rotations,and 44 % of the wicker were classified as fine and weak category(D<0.4 cm).On the contrary,the plantation of rotation 4 showed high uniformity degree,however the number of wicker was 20 % lower than those of rotation 0 to rotation 2.Moreover,the proportion of the thick wickers with D>0.8 cm was higher than those of other rotations.Therefore,a plan of two-harvest per year was suggested to enhance the wicker production with high quality.