竹柳持续淹水后的生长状况及耐水性调查研究

本文研究了江洲地、湖滩地当年新造竹柳成活率、生长量、病虫害等情况。结果表明,竹柳在持续2～3月的水淹情况下,对造林成活率影响不大,淹水过顶高度50cm以下、持续时间20d以内,成活率仍可达到造林验收合格标准;淹水过顶50cm以上,成活率将难以保证。淹水高度在林冠层以下,即离地面150cm,林木光合作用能正常进行,对竹柳的高径生长影响不大。林地淹水高度越高、淹水持续时间越长,其高、径生长量越小。

Research on the Growth and Flooding Tolerance of American Bamboo Willow after Prolonged Flooding

The paper studied the survival rate, growth increments and damages by diseases and pests of the bamboo willow forest new- ly-planted in the same year on the river islands and lake beaches. The results showed that the 2-to-3-month-long flooding had no signifi- cant impact on the afforestation survival rate. The survival rate could meet the afforestation acceptance standard with the flooding height within 50 cm above the tree top, but could not meet the standard with the flooding height beyond 50 cm above the tree top. The forest trees were capable of normal photosynthesis and growth of height and DBH with the flooding height below the forest canopy and 150 cm above the ground. The bigger the flooding height and the longer the forestland flooding lasted, the smaller the growth increments of height and DBH would be.