西北林学院学报2017，Vol.32Issue(5)：1-7,7.DOI:10.3969/j.issn.1001-7461.2017.05.01
干旱荒漠区不同演替阶段白刺灌丛沙堆土壤呼吸特征及其影响因素分析
Characteristics of Soil Respiration of Nitraria tangutorum at Different Succession Stages in Desert Areas & the Influencing Factors
摘要
Abstract
In order to study the soil respiration of Nitraria tangutorum at different succession stages (the initial,stable,developmental and degradation stages) as well as the response of soil respiration to environmental factors,the automatic soil CO2 flux monitoring system (Li-8100,LL-C0R Inc.,Lincoln,NE,USA)was used to determine the soil respiration rate.Soil temperature and soil water were measured simultaneously.The correlations between environment factors and soil respiration rate were analyzed.The result showed that:1) the variation of soil respiration presented a single-peak curve.The soil respiration rate was ranked from high to low as:stable stage＞initial stage＞developmental stage＞degradation stage;2) The soil respiration rate at different stages was correlated with soil temperature at the depth of 10 cm.The soil respiration rates in initial,stable,developmental and degradation stages were 70.16 ％,87.81 ％,82.67 ％,and 88.73％,respectively;3) With the increase of soil water,soil respiration increased.When soil water reached the maximum value,the limitation function of soil water reduced,the impact of soil water increase on soil respiration reduced;4) The daily variation of soil respiration at different slope positions were different.The mean values was in the order of the middle of windward slope ＞ base of windward slope ＞ top of windward slope ＞ middle of leeward slope ＞ the base of leeward slope.关键词
干旱荒漠区/白刺灌丛/演替阶段/土壤呼吸/水分/温度Key words
desert area/Nitraria tangutorum/succession stage/soil respiration/soil water/temperature分类
农业科技引用本文复制引用
韩福贵,孙涛,郭树江,段晓峰,张裕年,王景瑞..干旱荒漠区不同演替阶段白刺灌丛沙堆土壤呼吸特征及其影响因素分析[J].西北林学院学报,2017,32(5):1-7,7.基金项目
国家自然科学青年基金项目“干旱区白刺灌丛沙堆发育过程的土壤呼吸时空变化特征及其影响因素”(31300595). （31300595）
