套种豆科植物对尾巨桉人工林生长的影响

Effects of Interplanting Leguminous Plants on the Growth of Eucalyptus urophylla × E. grandis Plantation

为探讨套种对尾巨桉人工林及林下植被生长的影响,于2011—2014年在福建省漳州市华安县西陂国有林场开展尾巨桉人工林林下套种(扁豆、乌绿豆×印度豇豆)试验。结果表明:套种豆科植物可促进尾巨桉人工林林分生长,生长量大小依次表现为:套种乌绿豆×印度豇豆>套种扁豆>对照。套种后3 a,套种乌绿豆×印度豇豆、套种扁豆的尾巨桉林分树高、胸径、材积均显著高于对照,分别比对照提高23.10%、20.35%,8.97%、5.08%,49.32%、36.32%;套种豆科植物的林下植被种类、丰富度均优于对照,其中套种扁豆处理在增加林下植被种类上有较大优势。表明尾巨桉人工林下套种乌绿豆×印度豇豆、套种扁豆既对尾巨桉人工林林分生长有促进作用,又有利于保护林地植物多样性。

In order to evaluate the effects of interplanting pattern on the growth of Eucalyptus urophylla×E.grandis plantation and understory vegetation,experiment on inter-planting hyacinth bean or black mung bean and india cowpea in Eucalyptus urophylla×E.grandis plantation were carried out in Xipi State-owned Forest Farm,Hua'an County,Zhangzhou City,Fujian Province from 2011 to 2014.The results showed that intercropping leguminous plants can promoted the growth of Eucalyptus urophylla×E.grandis plantation.The order of growth showed that intercropped with black mung bean and india cowpea>intercropped with hyacinth bean>contrast.After 3 years of afforestation,the tree height,DBH and individual volume of Eucalyptus urophylla×E.grandis stand intercropped with black mung bean and india cowpea or hyacinth bean were significantly higher than those of the control,they increased by 23.10%,20.35%and 8.97%,5.08%and 49.32%,36.32%,respectively.The species,richness of understory vegetation of intercropping legumes were better than those of contrast,intercropped with hyacinth bean have great advantages in increasing the type of understory vegetation.The results showed that the intercropped with black mung bean and india cowpea or intercropped with hyacinth bean under Eucalyptus urophylla×E.grandis plantation not only promote the growth of Eucalyptus urophylla×E.grandis plantation,but also protect the diversity of forest plants.