|Table of Contents|

Soil Respiration of Grassland Under Condition of Human Disturbance(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年12
Page:
173-179
Research Field:
Publishing date:

Info

Title:
Soil Respiration of Grassland Under Condition of Human Disturbance
Author(s):
GE Nan; CUI Xiangxin; HAN Yanlong; ZHANG Qi; ZHANG Jing
(College of Ecology and Environmental Science，Inner Mongolia Agricultural University，Hohhot，Inner Mongolia 010019)
Keywords:
soil respiration; soil temperature and moisture; correlation mode; Xilin River Basin grassland
PACS:
-
DOI:
10.11937/bfyy.201612043
Abstract:
Dynamic soil respiration in different slope positions was measured by ADC soil respiration apparatus in runoff plots and natural grazing pasture of Xilin River Basin.The effects of human disturbance on soil respiration in typical steppe runoff plots were studied.The results showed that the diurnal variation of soil respiration and temperature could be expressed as a single peak curve and its highest occurred between 13:00 pm and 14:30 pm.The mean soil respiration rate was significant higher in top position of runoff plots(2.61±0.80)μmol?m-2?s-1 than that in bottom(1.51±0.32)μmol?m-2?s-1,or the top of natural grazing pasture(1.31±0.68)μmol?m-2?s-1 and the bottom position(0.75±0.25)μmol?m-2?s-1.The relationship between soil respiration and soil temperature was well explained by single variable model.The R2 values were 0.76,0.78,0.87 and 0.70,respectively.The Q10 values were 1.68,1.59,2.17 and 1.91,respectively.Two variable model of soil temperature and moisture could better express the influence of water heating factor on soil respiration,R2 value could reach 0.82-0.89,which provided a guiding role for the study of the relationship between soil respiration and soil water thermal factor.

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Last Update: 2016-07-21