关中东部地区退耕还林对土壤微形态的影响研究  

EFFECT OF "GRAIN FOR GREEN" ON MICROMORPHOLOGICAL FEATURES OF THE SOIL IN EAST GUANZHONG REGION

作　　者：庞奖励[1,2] 郭美娟[1] 邱海燕[1] 郭国龙[2] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062 [2]中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,西安710075

出　　处：《土壤学报》2009年第2期210-217,共8页Acta Pedologica Sinica

基　　金：国家自然科学基金项目(40471119,40571154);黄土与第四纪地质国家重点实验室基金项目(SKLLQG0604);陕西省自然科学基金(2006D01)资助

摘　　要：用偏光显微镜和Sisc Ias V8.0软件对关中东部典型农耕地和花椒园土壤的微形态进行观察和分析,结果表明:耕地和花椒园土壤有相同的剖面构型Ap1-Ap2-BC;粗颗粒矿物组合均以石英和长石占优势;与耕地相比,花椒园土壤的有机质含量增多,粗颗粒趋于变小变圆的程度降低,C/F(10μm)值较大;残积黏土和无定形铁含量增加,孔隙所占比例增加。这说明短时间内退耕还林对土壤剖面的构造和矿物组合影响不明显,但是对土壤微形态有显著影响;花椒园土壤更有利于旱塬地区土壤的吸水和保水,使其有机质含量增加。With the aid of polarizing microscope and Sisc Ias V8.0 software, micromorphological features of the soils from typical farmland and a Chinese prickly ash plantation in the East Guanzhong region were observed and analyzed. Results show that the two sampling sites had the same soil profile structure, Ap1-Ap2-BC, and their fractions of coarse granule minerals were dominated with quartz and feldspar. In comparison with the former, the latter was higher in content of organic matter, C/F（10μm）ratio, content of residual clay and amorphous iron, but lower in the trend of coarse particles becoming round and small, which indicates that the effect of ＂grain for green＂ is not significant on soil profile structure or mineral composition, but great on soil micromorphology. The soil in the Chinese prickly ash forest plantation is more capable of absorbing and reserve moisture, and tends to have higher organic matter.

关 键 词：土壤微形态 农业耕地 花椒园地 关中地区 

分 类 号：S151[农业科学—土壤学]