厦门大学学报（自然科学版）2017，Vol.56Issue(2)：205-211,7.DOI:10.6043/j.issn.0438-0479.201603045
拉萨河谷5种乡土树种晾晒后对根系活力及光合日进程的影响
Root Vigor and Photosynthetic Diurnal Courses of 5 Kinds of Native Species After Drying in the Lhasa River Valley
摘要
Abstract
Based on the low survival rate of forestation in the Lhasa River Valley,effects of the water content on seedlings vigor was analyzed,which would provide the scientific basis of protection and enhancement the survival rate of forestation.In this paper,Populus szechuanica var.tibetica,P.alba var.alba,Salix microsiachya,S.paraplesia var.subintegra and Hippophae gyantsensis were used as the research objects.Their stocks were dried for different lengths of time,and the growth vigor and photosynthetic diurnal courses of seedlings were measured after transplantation.The drying time was set to be 0,2,4,6 and 8 h.The results showed that the seedling vigor and photosynthetic capacity were closely related with their water content.With the increase of drying time,the root activity,the growth in height and the photosynthetic capacity of seedlings decreased after transplantation,eventually leading to the reduction of survival rate of seedlings.The time limit of drying was 4 h for P.szechuanica var.tibetica,6 h for P.alba var.alba,S.microsiachya,S.paraplesia var.subintegra,and 8 h for H.gyantsensis.It is crucial to protect the root,which is good for maintaining the seedling vigor and improving the survival rate in the Lhasa River Valley.关键词
拉萨河谷/乡土树种/晾晒/根系活力/光合日进程Key words
Lhasa River Valley/native tree/air-drying/root vigor/photosynthetic diurnal course分类
农业科技引用本文复制引用
陈向珍,杨小林,辛福梅..拉萨河谷5种乡土树种晾晒后对根系活力及光合日进程的影响[J].厦门大学学报（自然科学版）,2017,56(2):205-211,7.基金项目
国家科技支撑计划项目(2013BAC04B01) （2013BAC04B01）
国家自然科学基金(31460192) （31460192）
