黄土高原利用牧草枯落物防治刺槐纯林土壤极化的效应  

Effects of Grass Litter on Combating Soil Polarization of Robinia pseudoacia Forest in the Loess Plateau

作　　者：Luc Nhu Trung 刘增文[3,4] 张晓曦[1] 邴塬皓 朱博超[3] 

机构地区：[1]西北农林科技大学水土保持研究所,陕西杨凌712100 [2]农业与农村发展厅,越南老街330100 [3]西北农林科技大学资源环境学院,陕西杨凌712100 [4]农业部西北植物营养与农业环境重点实验室,陕西杨凌712100 [5]西北农林科技大学林学院,陕西杨凌712100

出　　处：《草地学报》2014年第6期1245-1251,共7页Acta Agrestia Sinica

基　　金：国家自然科学基金项目(31070630)资助

摘　　要：以黄土高原广泛分布的人工刺槐(Robinia pseudoacia)纯林为研究对象,通过采集林地腐殖质土壤并与7种常见豆科牧草的枯落物进行120d混合分解培养试验,分析牧草枯落物对刺槐纯林土壤性质的改良和土壤极化的防治效应。结果表明:对于黄土丘陵区(黄陵)刺槐纯林土壤,苜蓿(Medicago sativa)具有明显的改良作用,其次为草木樨(Melilotus officinalis);而胡枝子(Leapedeza bicolor)具有明显的恶化作用,其次为毛苕子(Vicia villosa)、红豆草(Onobrychis viciifolia)和沙打旺(Astragalus adsurgens);对于黄土残塬沟壑区(淳化)刺槐纯林土壤,草木樨和沙打旺具有明显的改良作用,其次为毛苕子;而小冠花(Coronilla varia)具有明显的恶化作用,其次为红豆草。Soil polarization due to pure forests is an important problem affecting the stability and sustainable development of ecosystem and the most effective solution may be fertilizing with grass litter or forming tree-grass complex ecosystem.For this study,Robinia pseudoacia forest widely distributed in the Loess Plateau was chosen as objective and a 120 d incubation experiment of forest soil mixed with 7 grass litters was carried out to investigate the effects of grass litter on combating soil polarization.The results showed that Medicago sativa was the most effective on improving the soil properties of the loess hilly areas （Huangling）,followed by Melilotus officinalis,but Leapedeza bicolor exacerbated the soil properties obviously,followed by Vicia villosa,Onobrychis vicii f olia and Astragalus adsurgens.Melilotus of ficinalis and Astragalus adsurgens significantly improved the soil properties of the loess gully area（Chunhua）,followed by Vicia villosa,but Coronilla varia exacerbated the soil properties obviously,followed by Onobrychis viciifolia.

关 键 词：牧草枯落物 刺槐纯林 土壤极化 

分 类 号：S714.2[农业科学—林学]