| 黄土丘陵区不同退耕年限草地群落特征及其土壤水分养分效应 |
| |
| 引用本文： | 刘海威,张少康,焦峰.黄土丘陵区不同退耕年限草地群落特征及其土壤水分养分效应[J].草业学报,2016,25(10):31-39. |
| |
| 作者姓名： | 刘海威 张少康 焦峰 |
| |
| 作者单位： | 1.中国科学院水利部水土保持研究所, 陕西 杨凌 712100;2.中国科学院大学, 北京 100049;3.西北农林科技大学水土保持研究所, 陕西 杨凌 712100 |
| |
| 基金项目： | 国家自然科学基金项目(41271043，31370455)，中国科学院知识创新工程“百人计划”项目资助。 |
| |
| 摘 要： | 采用空间代替时间以及对比分析的方法,根据黄土丘陵区8个退耕年限序列(1~35年)的退耕地的采样数据进行分析,研究在植被恢复过程中,随着退耕年限变化,植被更新与土壤水分养分之间的互动效应。结果表明, 1)黄土丘陵区在退耕35年期间,随着退耕年限的增加,总物种数呈减少-增加-减少-增加的趋势。Margalef指数、Shannon-Wiener指数变化趋势为先增加-减小-增大,而Pielou均匀度指数相反。 2)群落地上地下生物量随退耕年限增大而增大,呈显著正相关关系(P<0.05)。 3)随着退耕年限增加,土壤养分(除速效K外)含量先减少后增加,而土壤速效K含量呈一直下降趋势,土壤水分含量在20~50 cm、50~80 cm、80~100 cm处先增加后减少,在0~20 cm处相反。 4)植被特征指数(除Pielou外)与有机质、全N、全P呈显著正相关,而与土壤养分速效K呈正相关,关系不显著。Pielou指数与土壤养分呈正相关关系,但不显著。
|
| 关 键 词： | 黄土丘陵区 退耕年限 植物生物量 土壤水分 土壤养分 |
| 收稿时间： | 2016-04-21 |
Relationships between community characteristics and soil nutrients and moisture in abandoned hill country grassland |
| |
| LIU Hai-Wei,ZHANG Shao-Kang,JIAO Feng.Relationships between community characteristics and soil nutrients and moisture in abandoned hill country grassland[J].Acta Prataculturae Sinica,2016,25(10):31-39. |
| |
| Authors: | LIU Hai-Wei ZHANG Shao-Kang JIAO Feng |
| |
| Institution: | 1.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China;2.University of Chinese Academy of Sciences, Beijing 100049,China;3.Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China |
| |
| Abstract: | Using comparative analysis and substituting temporal serial with spatial serial data,we analyzed data collected from abandoned farmland with eight different vegetation restoration periods (1-35 years).The inter-action between vegetation regeneration,soil moisture and soil nutrients as the vegetation restoration period changed was also investigated.Results;1)During 35 years of natural restoration the number of species present fluctuated,initially decreasing,increasing and decreasing again.The Margalef richness index and Shannon-Wiener index firstly increased,then decreased,and then increased again.However,the Pielou evenness index showed the opposite trend.2)With increasing restoration period,aboveground biomass and underground bio-mass were both significantly positively correlated with restoration duration.3 )As restoration duration in-creased,soil moisture and soil fertility (except available phosphorus)in different soil layers initially declined and then increased.Available phosphorus decreased.Soil moisture of 20-50 cm,50-80 cm,80-100 cm ini-tially declined and then increased;the opposite pattern was observed in the 20cm soil layer.4)During the res-toration process,indices of vegetation traits (except the Pielou index)were significantly positive correlated with soil nutrient content including soil organic matter,nitrogen and phosphorus. |
| |
| Keywords: | hilly-gully region abandoned years biomass soil moisture soil nutrients |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《草业学报》浏览原始摘要信息 |
| 点击此处可从《草业学报》下载免费的PDF全文 |
|
