半干旱退化沙地人工林复合生态经济系统的效应研究

Effects of the Compound Eco-economic System Patterns of Plantations in Degraded Sandy Land in Semi-arid Area

以奈曼旗兴隆沼为研究对象,通过28年实地调查与观测,提出了半干旱退化沙地人工林复合生态经济系统恢复模式,并对该模式的生态效应进行了监测。结果表明:退化沙地人工林复合生态经济系统恢复模式建成后,该地区控制流沙面积达1 806.7 hm2,农作物的光合利用率由原来0.41%(1977年),提高到0.77%(1989年),农田土壤风蚀模数减小了6.09倍,土壤养分损失量减少了74%,防风固沙效益提高了83.57%。

Taking Xinglongzhao in Naiman County as the research object, on the base of 28 - year field surveys and observations, the compound eeo - economic system restoration pattern of plantation is put forward in degraded sandy land in semi - arid area, and the ecological effect of this pattern is monitored. The results show that after building the compound eco - economic system restoration pattern of plantation in degraded sandy land, the area of the con- trolled quicksand has reached 1 806.7 hm^2, the utilizing rate of photosynthesis of the crop has risen from 0.41% （1997） to 0. 77% （ 1989）, the soil wind erosion modulus of farmland has decreased by 6.09 times, the loss quantity of soil nutrient has decreased by 74% , the wind - breaking and sand - fixing effect has increased by 83.57%.