黄土高原丘陵区不同土地利用方式对土壤理化性质的影响  

Effects of different land-uses on soil physical and chemical properties in the Loess Plateau of Shanxi Province.

作　　者：王莉[1] 张强[2] 牛西午[3] 杨治平[2] 张建杰[2] 

机构地区：[1]山西大学生物工程学院,太原030006 [2]山西省土壤环境与养分资源重点实验室,太原030031 [3]山西省农业科学院,太原030006

出　　处：《中国生态农业学报》2007年第4期53-56,共4页Chinese Journal of Eco-Agriculture

基　　金：国家农业部948项目"干旱半干旱风沙型盐碱区生态建设关键技术引进"(2004-Z32)资助

摘　　要：对晋西北黄土高原丘陵区持续利用30年的小叶锦鸡儿人工林、农田、杨树林、小叶锦鸡儿和杨树的混交林地以及撂荒地的土壤理化性状进行了研究。结果表明,不同土地利用方式对土壤理化性质影响很大。小叶锦鸡儿和杨树的混交林以及小叶锦鸡儿人工林可以降低土壤容重,提高土壤酶活性、有机质和全N含量,从而改善土壤肥力。混交林和小叶锦鸡儿人工林的土壤培肥作用高于杨树纯林。粗放的农业耕作措施提高土壤容重,降低土壤养分含量,使土壤退化。撂荒地一定程度上可以起到培肥土壤的作用。在黄土高原丘陵区,种植小叶锦鸡儿人工林以及小叶锦鸡儿和杨树的混交林是较好的生态重建和植被恢复方式。Soil properties under five land-uses, Caragana microphylla land, farmland, poplar forest, fallow land, and mixed plantation of Caragana microphylla and poplar in a typical Loess Plateau region, northwest of Shanxi Province were studied. Results show a significant influence of land-use on soil properties. Caragana microphylla and mixed poplar and Caragana microphylla plantation improve enzyme activity, total nitrogen and organic matter contents leading to higher soil fertility compared with artificial poplar forests. Cultivation practices increase soil bulk density, decrease enzyme activities, total nitrogen and organic matter contents of cropland soils resulting in soil degradation. Land fallow improves soil fertility to some extent. It is further shown that growing Caragana microphylla and mixed Caragana microphylla and poplar plants are the most sustainable ways for vegetation rehabilitation in the Loess Plateau.

关 键 词：黄土高原丘陵区 土地利用方式 土壤养分 土壤容重 

分 类 号：S714.2[农业科学—林学]