The control of soil polarization in Populus simonii and Quercus liaotungensis forests by forage litter on the Loess Plateau,P. R. China  

作　　者：Nhu Trung Luc Zengwen Liu Yuanhao Bing Xiaoxi Zhang Thi Huong Nguyen 

机构地区：[1]Institute of Soil and Water Conservation, Northwest A&F University [2]Department of Agriculture and Rural Development of Lao Cai, Lao Cai City 330100, Vietnam [3]College of Natural Resources and Environment, Northwest A&F University [4]Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture [5]College of Forestry, Northwest A&F University [6]Department of Natural Resources and Environment of Lao Cai, Lao Cai City 330100, Vietnam

出　　处：《Journal of Forestry Research》2015年第3期687-695,共9页林业研究（英文版）

基　　金：financially supported by a grant from National Natural Science Foundation of China(31070630)

摘　　要：Soil polarization in pure forest stands affects the stability and sustainable development of the ecosystem. The most effective approaches to the prevention of soil polarization may be the use of forage litter as fertilizer or the direct establishment of tree-grass communities. We investigated monospecific plantations of Populus simonii and Quercus liaotungensis. Such plantations have been established throughout the Loess Plateau of China. A 120-day decomposition incubation experiment with forest humus soil mixed with 7 common leguminous forage litterspecies was performed to study the uses of forage litter in controlling soil polarization in pure forests. The addition of forage litter of Astragalus adsurgens, Lespedeza bicolor, and Vicia viUosa to the soil of pure P. simonii forest clearly improved the soil quality, these forage species are suitable for planting with P. simonii, whereas Melilotus officinalis, Medicago sativa, and Onobrychis viciifolia litter produced obvious deterioration, thus these forages should not be planted with P. simonii. Coronilla varia litter showed no significant influence. The addition of forage litter of M. sativa to the soil of pure Q. liaotungensis forest clearly improved the soil quality, and C. varia and V. villosa also yielded improvements but were slightly less effective than M. sativa litter, these forages are suitable to be planted with Q. liaotungensis. However, L. bicolor showed obvious deterioration, followed by O. viciifolia and A. adsurgens, and M. officinalis had no significant influence. These spe- cies should not be planted with Q. liaotungensis.Soil polarization in pure forest stands affects the stability and sustainable development of the ecosystem. The most effective approaches to the prevention of soil polarization may be the use of forage litter as fertilizer or the direct establishment of tree-grass communities. We investigated monospecific plantations of Populus simonii and Quercus liaotungensis. Such plantations have been established throughout the Loess Plateau of China. A 120-day decomposition incubation experiment with forest humus soil mixed with 7 common leguminous forage litterspecies was performed to study the uses of forage litter in controlling soil polarization in pure forests. The addition of forage litter of Astragalus adsurgens, Lespedeza bicolor, and Vicia viUosa to the soil of pure P. simonii forest clearly improved the soil quality, these forage species are suitable for planting with P. simonii, whereas Melilotus officinalis, Medicago sativa, and Onobrychis viciifolia litter produced obvious deterioration, thus these forages should not be planted with P. simonii. Coronilla varia litter showed no significant influence. The addition of forage litter of M. sativa to the soil of pure Q. liaotungensis forest clearly improved the soil quality, and C. varia and V. villosa also yielded improvements but were slightly less effective than M. sativa litter, these forages are suitable to be planted with Q. liaotungensis. However, L. bicolor showed obvious deterioration, followed by O. viciifolia and A. adsurgens, and M. officinalis had no significant influence. These spe- cies should not be planted with Q. liaotungensis.

关 键 词：Soil polarization Forage litter Populussimonii Quercus liaotungensis 

分 类 号：S792.11[农业科学—林木遗传育种] S792.18[农业科学—林学]