【摘要】 为了研究生态垫覆盖对林木光合特性的影响,首次将生态垫应用于华北干旱油松造林地。在油松(7~8年)造林初期,用生态垫覆盖林地,经过2个生长季后对土壤水分及各项光合指标进行测定。结果表明:覆盖生态垫增加了表层0~20cm的土壤含水率0·04%~2·78%(相对增长率0·4%~92·2%);提高造林成活率5·1%;增加地径年生长量58·5%,促进了林木生长。覆盖可以提高叶片光饱和点下的光合速率10·6%~44·3%;增加光合速率日变化极大值30%;提高生长季Tr极大值45·8%、提高生长季Cond极大值36·0%,但对油松光补偿点及水分利用效率影响并不显著。更多还原

【Abstract】 After the floor of the Pinus tabulaeformis plantation was covered with the eco-mat for 2 growing seasons, some growth and photosynthetic parameters were checked. The result indicates that the tree growth and survival rate increased to some extent due to the increasing of soil moisture contents by covering the floor with the eco-mat, and the soil moisture contents of 0～20cm was 9.56%～104.17% higher than that of CK ; the survival rate increased by 5.1% and the annual growth of the treated tree diameter was 58.5% higher than CK; the daily maximum photosynthetic rate and the Pn in the photosynthesis-saturated point increased by 30% and 10.6%～44.3% respectively compared with the CK; the Tr and Cond increased to some extent, while the light compensation points and the water-consumption efficiencies of the trees between the treated and CK were not different from each other remarkably.更多还原