黄土丘陵沟壑区不同人工林地土壤肥力变化研究  

Soil fertilizer change of different artificial forest on Loess plateau Gully

作　　者：岳庆玲[1] 常庆瑞[1] 刘京[1] 陶文芳[1] 刘文娟[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《干旱地区农业研究》2007年第3期100-104,共5页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金项目(30571527);国家泥沙研究培训中心研究项目(2005-01-01);国家重点基础研究发展计划项目(2007CB407203)

摘　　要：通过对吴起县不同纯林及其交互效应混交林地的土壤调查、样品测定和室内分析,了解不同人工林地土壤肥力变化情况。结果表明0-20 cm表层土壤养分变化较大。其中,山杏×沙棘混交林地和山杏纯林地利于改善土壤有机质水平,分别达到20.79 g/kg和13.93 g/kg;山杏×小叶杨混交林地和小叶杨纯林地碱解氮含量增幅较大,分别为61.55 mg/kg和61.11 mg/kg;山杏×小叶杨混交林地有效磷含量相对较高,为5.43 mg/kg;山杏纯林地、山杏×小叶杨混交林地和小叶杨纯林地速效钾变化较为明显,分别为126.94,125.61和119.28 mg/kg。混交林地比纯林地更利于改善土壤肥力,建议种植山杏×沙棘混交林。By the survey of the soil vegetation,the sample test and the indoors analysis of the different soil profile, in the north of Shaanxi, Wuqi county, the artificial forest nutrient changes were researched, it indicated that the nutrient variety of the surface layer 0- 20 cm was bigger than that of deeper profile. The mixed of Prunus arrnerniaca and the mixed of Hippopgae Rharnnoides and Prunus arrnerniaca were beneficial to im- proving organic matter quality of soil, reached 20.79 g/kg and 13.93 g/kg; the alkaline hydrolysis content of the mixed of Prunus armerniaca and Populus simonii had stonger increase extent, it reached 61.55 mg/kg and 61.11 mg/kg;the available phosphorus content of the mixed of Prunus arrnerniaca and Populus sirnonii was relatively higher than that of others, and it is 5.43 mg/kg; the available kalium content variety of Prunus arrnerniaca and the mixed of Prunus armerniaca and Populus sirnonii and Populus sirnonil were evident, they were 126.94,125.61 and 119.28 g/kg respectively. In order to improve soil nutrient contents, strengthen soil fertility, we must reinforce the soil ecological rehabilitation, and guard against land degradation in this area. It recommeds that the mixed forest of Prunus armemiaca and Hippopgae Rharnnoides should be planted in this region. The results showed that the mixed forest is better than purer forest to improve the soil nutrient.

关 键 词：黄土沟壑 人工林 土壤肥力 混交林 

分 类 号：S158.3[农业科学—土壤学]