应用生态学报2012，Vol.23Issue(3)：595-602,8.
黄土高原小叶杨与其他树种枯落叶混合分解对土壤性质的影响
Effects of mixed decomposition of Populus simonii and other tree species leaf litters on soil properties in Loess Plateau
摘要
Abstract
In this study, the leaf litters of Populus simonii and other 11 tree species were put into soil separately or in mixture after grinding, and incubated in laboratory to analyze the effects of their decomposition on soil properties and the interactions between the litters decomposition. The decomposition of each kind of the leaf litters in soil increased the soil urease, dehydrogenase, and phos-phatase activities and the soil organic matter and available N contents markedly, but had greater differences in the effects on the soil available P content and CEC. The decomposition of the leaf litters of Caragana microphylla and of Amorpha fruticosa showed obvious effects in improving soil properties. The decomposition of the mixed leaf litters of P. simonii and Pinus tabulaeformis, Platy-cladus orientalis, Robinia pseudoacacia, or Ulmus pumila showed interactive promotion effects on the abundance of soil microbes, and that of the mixed leaf litters of P. simonii and P. orientalis or C. microphylla showed interactive promotion effects on the soil organic matter, available P, and available K contents and soil CEC but interactive inhibition effects on the activities of most of the soil enzymes tested. The decomposition of the mixed leaf litters of P. simonii and Larix principis-rupprechtii showed interactive promotion effects on the activities of most of the soil enzymes and soil nutrient contents, while that of the mixed leaf litters of P. simonii and P. sylvestris var. mongolica showed interactive inhibition effects. Overall, the decomposition of the mixed leaf litters of P. simo- nii and U. pumila, P. tabulaeformis, L. principis-rupprechtii, or R. pseudoacacia could improve soil quality, but the mixed leaf litters of P. simonii and P. orientalis, C. microphylla, P. sylvestris var. mongolica, Hippophae rhamnoides, or A. fruticosa showed an interactive inhibition effect during their decomposition.关键词
小叶杨/枯落叶/混合分解/森林土壤Key words
Populus simonii/ leaf litter/ mixed decomposition/ forest soil分类
农业科技引用本文复制引用
李茜,刘增文,杜良贞..黄土高原小叶杨与其他树种枯落叶混合分解对土壤性质的影响[J].应用生态学报,2012,23(3):595-602,8.基金项目
国家自然科学基金项目(31070630)资助. （31070630）
