农田防护林网林地水分状况研究  

STUDIES ON MOISTURE CONTENT IN WOODLAND OF A FARM PREVENTING FOREST NETWORK

作　　者：李银芳[1] 杨戈[1] 

机构地区：[1]中国科学院新疆生物土壤沙漠研究所

出　　处：《中国沙漠》1997年第3期295-300,共6页Journal of Desert Research

基　　金：国家"八五"攻关专题"干旱;半干旱地区防护林建设与水分平衡研究"

摘　　要：通过１９９２～１９９４年的定位观测，对农田防护林网中的护田林、护渠林林地含水量和林木生长进行了研究。结果表明，３年平均耗水量：护田林是１５４．４０ｍｍ，护渠林内侧２９９５．９２ｍｍ，护渠林外侧１５１４．７５ｍｍ。护田林带的土壤含水量在０～１５０ｃｍ层内变化，以下为稳定层，而护渠林深层渗漏严重，可穿透３ｍ土层。胸径和材积生长量是护渠林内侧＞护渠林外侧＞护田林，但护田林若遇丰水年份，则胸径和材积猛增。农田防护林网的布置格局，应大力发展护渠林。护田林带应采用３行窄带式沟植，成林后可不再灌溉，但切忌农田休闲时，中断维持林木生长的侧渗水。The relation of soil moisture and plants growth in farm preventing forest network has been studied, based on the fixed position data observed in 1992￣1994. The results are as follows: ① The average water consumption of farm shelterbelt, inner side and outer side canal shelterbelt in three years are 154.40, 2 995.92 and 1 514.75 mm individually. ② The soil moisture content changes between 0￣150 cm below the ground in farm shelterbelt land and 0￣-3 m or more in canal shelterbelt land. ③ The farmland shelterbelt should be constructed by narrow belt with three lines, and the water source after the plant growing up may be applied by side seeped water from farmland. As for the establishment of compound forest network, the canal shelterbelt should be developped with great effort.

关 键 词：箭杆杨 农田 防护林网 耗水量 林地水分 

分 类 号：S714[农业科学—林学] S152.75