摘要
近年来,为保护绿洲,防止土地沙漠化及风沙流对绿洲农田的危害,利用农闲水灌溉丘间地,采用丘间地营造乔木林,沙丘迎风坡中部以下营造灌木林的方法,在甘肃省河西地区临泽镇北部流沙中营造乔灌结合林2000ha多,初步形成一条防风固沙护田的绿色林带。随着林木的生长发育。
According to the results investigated in northern Linze Oasis for tree and shrub mixed sand-holding forests, the degree of wind reduction and micro-climate improvement increascs with the growth of afforestation years. After 8 years of afforestation, sand dune has been stabilized, wind speed is reduced by above 50%, air relative humidity increased by 6—8%, and evaporation potentiality reduced by 43—60%. After 12 years, each ha of the forest can provide timber 262.8m^3, firewood charcoal 39t and litterfall 51t(dry weight) which contains (NH_4)_2SO_4 1873.5kg, Ca_3(PO_4)_2 96 kg and KCl 2872.5kg. The net output is 53479.2 yuan ·ha^(-1). This mixed sand-holding forest has gained both ecological and economic benefits. It is valuable to be popularized in arid areas.
出处
《生态学杂志》
CAS
CSCD
北大核心
1989年第6期27-30,共4页
Chinese Journal of Ecology
关键词
沙漠治理
固沙林
生态效益
desert control, sand-holding forest, Linze region.
