摘要
以6年生的垂榆为材料,在相同的苗圃地栽培条件下,通过同一时间的测定结果,研究了蛀干害虫的危害对幼树水势和蒸腾速率的影响。结果表明,蛀干害虫破坏木质部,影响水分输导,降低水势和蒸腾速率。其危害程度愈强,降低的幅度愈大,二者之间存在着明显的相关性。利用这种相关性可以从水分生理的角度研究蛀干害虫对树木的危害程度。
Six-year Ulmus pamila trees were used as experimental material,under thesame cultivated farming condition in a nursery,and by using the results measured at the sametime,the influnce made by the stem-boring insects on the water polential and evaporationrate of young trees have been sttidied. The results show that the stem-boring insects destroythe xylem parts of the trees and effect the transport of water and decrease the water potentialand evaporation rate. The more harmful the damage is,the greater decrease of water potentialand evaporation rate. There is an obvious correlation between the two factors. By using thecorrelation,the damage to the trees can be studied from the point of view of water physiolo-gy.
基金
内蒙古自然科学基金
关键词
蛀干害虫
水势
蒸腾速率
树木
stem-boring insects
water potential
evaporation rate