Effects of Three-dimensional Structure of Vegetation on Particle Size Distribution and Nutrient Content of Water-eroded Red Soil  

植被三维结构对水蚀红壤粒径分布及养分含量的作用（英文）

作　　者：顾祝军[1] 罗昊 

机构地区：[1]南京晓庄学院环境科学学院,江苏南京211171 [2]中煤科工集团重庆研究院有限公司,重庆400039

出　　处：《Agricultural Science & Technology》2016年第2期453-459,466,共8页农业科学与技术（英文版）

基　　金：Supported by National Natural Science Foundation of China(41571415;41071281);Natural Science Foundation of Jiangsu Province(BK20131078);"Qinglan Project"of Jiangsu Province~~

摘　　要：Based on the vertical stratification type of vegetation in the 48 plots （15m×15 m） in Hetian Town, Changting County, Fujian Province, this study was conduct ed to determine the overall vegetation fractional coverage （VFC）, litter thickness, soi particle size distribution and nutrient content at different vertical level, analyze the correlations between vegetation characters and soil properties, and compare the dif ferences in the VFC, litter thickness, soil particle size distribution and nutrient con- tent among different erosion degrees and vertical structure types. The result., showed that the VFC and litter thickness were all negatively related to erosion de gree; they were positively related to soil organic matter content, total nitrogen con- tent and total phosphorus content, but not significantly correlated with soil tota potassium content. When the VFC was higher than 50% and litter thickness wa.＇ higher than 20 ram, the water and soil could be effectively conserved; and the plan litter showed better water and soil conservation effect than the upper vegetation o~ canopy layer. In the vertical structure types of different vegetations, the forest-shrub grass, forest-shrub, shrub-grass and pure grass all could promote vegetation growth improve soil structure and maintain soil fertility.基于福建省长汀县河田镇48个样区(15 m×15 m)植被垂直分层类型,不同垂直层次的总体植被覆盖度、枯落物厚度、土壤粒径分布及养分含量3类土壤属性数据,分析植被特征与土壤属性间的相互关系,并比较不同侵蚀程度、不同垂直结构类型下植被覆盖度、枯落物厚度与土壤粒径分布及养分含量的差异。结果表明,植被覆盖度、枯落物厚度与侵蚀程度显著负相关,与土壤中有机质含量、全氮含量、全磷含量显著正相关,但与全钾含量差异不显著。当植被覆盖度达到50%、枯落物厚度达到20 mm时,可以有效保持水土,其中枯落物较上层植被的水土保持作用更明显。不同植被垂直结构组合中,选择林灌草、林灌、灌草、纯草均可以较好地促进植被生长、改良土壤结构、保持土壤肥力。

关 键 词：VEGETATION Soil nutrient 3-D structure Soil erosion 

分 类 号：S157.43[农业科学—土壤学]