globalchange  > 气候变化与战略
CSCD记录号: CSCD:5244484
论文题名:
水蚀风蚀交错区土壤呼吸特征及其对水热因子的响应
其他题名: Soil Respiration and Its Responses to Soil Temperature and Water in Interlaced Zone of Water-wind Erosions in China
作者: 王胜1; 樊军1; 王建国2; 易彩琼2; 高宇1
刊名: 农业环境科学学报
ISSN: 1672-2043
出版年: 2014
卷: 33, 期:9, 页码:1070-1075
语种: 中文
中文关键词: 土地利用方式 ; 土壤水分 ; 降雨 ; 土壤温度 ; 水蚀风蚀交错带
英文关键词: land use pattern ; soil water ; precipitation ; soil temperature ; water-wind erosion interlaced zone
WOS学科分类: AGRICULTURE MULTIDISCIPLINARY
WOS研究方向: Agriculture
中文摘要: 为研究黄土高原水蚀风蚀交错区不同土地利用方式下的土壤呼吸特征及其对水热因子的响应,于2012年5月至10月,采用动态密闭气室法(IRGA)对裸地、农地、苜蓿地、柠条地和撂荒地土壤呼吸速率进行连续日动态测定,基于小时测定结果,分析土壤呼吸特征及其与水热因子的关系。结果显示,土壤呼吸日动态变化为单峰曲线,土壤呼吸速率一般在5:00-7:00(UTC+8)最低,在13:00-15:00最高,9:00和19:00时土壤呼吸测量值最接近日平均值。土地利用方式显著影响土壤呼吸速率(P<0.01),其均值大小顺序为:苜蓿地>柠条地>撂荒地>农地>裸地。温度是影响土壤呼吸的决定性因子,土壤呼吸速率与5 cm土层温度相关程度最高(P<0.01)。5月至8月中旬降雨促进土壤呼吸,8月下旬至10月下旬降雨抑制土壤呼吸;水分对土壤呼吸具有双向调节作用:当0~10 cm土层含水量低于0.20 cm~3·cm~(-3)时,水分促进土壤呼吸,超过0.20 cm~3·cm~(-3)时抑制土壤呼吸。研究提出的E-P-Q (Exponential-Piecewise-Coefficient)模型能够合理解释区域内水热因子对土壤呼吸的响应规律。
英文摘要: It is of critical importance to evaluate the regional carbon cycling and balance more accurately as global warming is the key issue of the climate changes. This research is aimed to reveal the soil respiration(SR) and its responses to soil temperature and water in a waterwind erosion interlaced zone in the Loess Plateau, China. Hourly SR in bareland, cropland, alfalfa land, cartagena korshinkii land and abandoned land were measured automatically from May to October, 2012, using Infra- Red Gas Analysis(IRGA) method. Soil temperature at depth of 5 cm and 15 cm(T_5 and T_(15), respectively) and volumetric water content of 0~10 cm and 10~20 cm soils(VWC_(0-10) and VWC_(10-20), respectively) were also monitored. The SR diurnal dynamics was a single-peak curve, with the peak occurring between 13:00 (UTC+8, similarly hereinafter) and 15:00, and the trough between 05:00 to 07:00. The SR measured at 9:00 and 19:00 was equal to the daily average value. Land use patterns had significantly impacts on SR (P<0.01), with order of alfalfa land>cartagena korshinkii land>abandoned land>cropland>bare land. The SR had significant positive correlation with T_5, T_(15), VWC_(0~10) and VWC_(10~20) for five land use patterns, but the correlationship with soil water was weaker than with soil temperature. The correlation coefficients were greater for T_5 than T_(15) and VWC_(0~10) than VWC_(10-20). The precipitation increased SR during May to late August, but inhibited SR during September to late October. Soil SR increased with increasing soil water when VWC_(0~10) was less than 0.2 cm~3·cm~(-3), but decreased as soil water further increased when VWC_(10~20) was greater than 0.2 cm~3·cm~(-3). The E- P- Q(Exponential- Piecewise- Coefficient) model could rationally explain relationships between SR and soil temperature and/or soil water.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/148068
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: 1.中国科学院水利部水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌, 陕西 712100, 中国
2.西北农林科技大学水土保持研究所, 杨凌, 陕西 712100, 中国

Recommended Citation:
王胜,樊军,王建国,等. 水蚀风蚀交错区土壤呼吸特征及其对水热因子的响应[J]. 农业环境科学学报,2014-01-01,33(9):1070-1075
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[王胜]'s Articles
[樊军]'s Articles
[王建国]'s Articles
百度学术
Similar articles in Baidu Scholar
[王胜]'s Articles
[樊军]'s Articles
[王建国]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[王胜]‘s Articles
[樊军]‘s Articles
[王建国]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.