滇南热带造林地林农间作对幼林生长量的影响

为了探索在滇南热带地区造林地进行林农间作对幼林生长的影响,文章选择了6个热带亚热带速生造林树种,定植于景谷益智乡斗母信村造林地上,对每一树种分别采用林农间作管理和一般管理(每年进行两次砍草和铲塘)的两种方式进行幼林管理;定植后3 a时测定保存率、地径、树高、冠幅生长量并进行统计分析。实验结果表明:利用林农间作方式管理造林林地平均可以提高保存率10%,加快地径生长1.98～4.30倍,加快树高生长1.89～4.51倍,使造林地提前1～3 a达到郁闭,而使造林具有较好的效果并减少林地抚育的年限和抚育的投入。

EFFECTS OF ALLEY CROPPING MANAGEMENT ON THE GROWTH QUANTITY OF YOUNG FOREST IN SOUTH YUNNAN, CHINA

In order to study the effects of alley cropping on growth increment of saplings of tropical plantations in south Yunnan areas,six tropical/subtropical tree species were selected to conduct growing experiments in planting site located at Toumuxin village of Yizhi township of Jinggu county.The growing performance of tree species under alley cropping with agricultural crops and that under the general forestation measures was compared.Three years after fixed planting,the results showed that compared with the general forestation measures,alley cropping could increased the tree planting preserve ratio by 10%,increase the growth of basal diameter by 1.98 to 4.3 times,and that of tree height was increased by 1.89 to 4.51 times.The planting site could be closed 1 to 3 years ahead.