黄土丘陵小流域植被恢复驱动下的土壤养分特征  

Effects of Different Vegetation Restoration Types on Soil Nutrient Properties in the Hill and Gully Region of Loess Plateau

作　　者：栗妍[1] 魏玮[1] 邱扬[1] 刘栩如 张琳[1] 

机构地区：[1]北京师范大学地理学与遥感科学学院,北京100875

出　　处：《水土保持研究》2014年第6期115-121,128,共8页Research of Soil and Water Conservation

基　　金：国家自然科学基金资助项目(30970503;41171152);国家自然科学基金重大课题资助项目(41390462)

摘　　要：为定量揭示植被恢复对土壤养分的影响,本文借助土壤养分指数(SNI)评价方法,对典型黄土丘陵区小流域不同恢复方式下典型植物群落的土壤养分进行定量化分析和综合评价。结果表明:不同恢复方式的土壤SNI值大小依次为:退耕还林(0.814)>退耕还灌(0.659)>弃耕或退耕还草(0.364)>对照农地(0.220);不同植物群落土壤SNI值大小依次为:柠条群落(0.777)>小叶杨群落(0.658)>刺槐群落(0.545)>杏群落(0.510)>草群落(0.425)>茵陈蒿群落(0.310)>沙棘群落(0.271)>白羊草群落(0.257)>硬质早熟禾群落(0.249)>大豆群落(0.227)>铁杆蒿群落(0.224)>达乌里胡枝子群落(0.103)。研究表明,生态退耕后不同恢复方式对土壤养分均有明显的改善作用。退耕还灌的三种植物群落土壤养分指数差异显著,退耕还林、弃耕或退耕还草内部各群落间土壤养分指数差异不显著,除铁杆蒿和达乌里胡枝子群落外,其他植物群落的土壤养分指数均高于农田作物大豆群落。Soil nutrient properties in the Loess Plateau are largely influenced by re-vegetation. By calculating the soil nutrient index （SNI）, this study evaluated the quantitative influence of typical plant communities of different re-vegetation types on soil nutrient properties in the hill and gully region of loess. Results of this study showed that the order of SNI among different vegetation types was trees（0. 814）〉 brush（0. 659） grassland（0. 364）〉 crap（0. 220）. Calculated SNI of different plant communities was in order of Caragana korshinski （0. 777）〉 Populus simonii （0. 658）〉 Robinia pseudoacacia （0. 545）〉 Armeniaca（0. 510）〉 Koe- leria cristata （0. 425） 〉 Artemisia capillaris （0. 310） 〉 Hippophae rhamnoides （0. 271） 〉 Bothriochloa ischaemum（0. 257））Poa sphondylodes （0. 249）〉 Glycine max （0. 227）〉Artemisia sacrorurn （0. 224） Lespedeza daurica （0. 103）. The results indicated that different vegetation restoration measures can signifi- cantly improve soil nutrient properties. Significant difference in SNI was found among different brush com- munities. SNI of plant communty was found to be obviously higher than that in Glycine max crop community except for Artemisia sacrorum and Lespedeza daurica.

关 键 词：黄土丘陵区 植被恢复 恢复方式 植物群落 土壤养分 

分 类 号：S158.3[农业科学—土壤学]