晋西退耕地刺槐人工林水土保持效应研究  

Soil and Water Conservation Effect of Robinia pseudoacacia Plantation on Abandoned Cropland in Western Shanxi Province

作　　者：刘林 韩国忠 于博威 LIU Lin;HAN Guozhong;YU Bowei(Shanxi Institute of Soil and Water Conservation,Taiyuan,Shanxi 030013,China;Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China)

机构地区：[1]山西省水土保持科学研究所,山西太原030013 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《中国水土保持》2020年第10期54-56,I0003,共4页Soil and Water Conservation in China

摘　　要：以晋西丘陵退耕地为研究对象,采用实地调查、室内分析和数学统计相结合的方法,定量评价了新型等高大坑造林模式下刺槐人工林的水土保持效应,结果表明:刺槐人工林地土壤表层水分随退耕年限呈先减少后增加的变化趋势,表层全氮含量、有机碳含量、阳离子交换量随退耕年限增加而递增,土壤可蚀性因子K值随退耕年限增加而降低。说明新造林模式下刺槐人工林对当地土壤的保水、保土和保肥功能有显著的提升作用,并且新造林模式能很好地保护刺槐幼林向成熟林过渡,这对当地开展低效林改造、生态恢复与重建工作具有重要的参考价值。Taking abandoned cropland in hilly area of western Shanxi as a research subject and using the combined method of field investigation,indoor analysis and mathematical statistics,the effect of soil and water conservation of Robinia pseudoacacia plantation under the new contour pit afforestation model was evaluated quantitatively.The outcomes show that the soil surface water content of Robinia pseudoacacia plantation is decreased firstly and then increased with the years of abandoned farmland.The total nitrogen content,organic carbon content and cation exchange capacity are increased with the years of abandoned farmland.The K value of soil erodibility factor is decreased with the increase of returning farmland years.Under the new afforestation mode,Robinia pseudoacacia plantation can significantly improve the functions of water,soil and fertilizer conservation,and the new afforestation mode can protect the transition from young Robinia pseudoacacia to mature forest.It has important reference value for local low efficiency forest transformation,ecological restoration and reconstruction.

关 键 词：刺槐人工林 等高大坑 水土保持效应 退耕地 晋西 

分 类 号：S727.22[农业科学—林木遗传育种] S714.7[农业科学—林学]