التفاصيل البيبلوغرافية
| العنوان: |
Soil respiration dynamics and its controlling factors of typical vegetation communities on meadow steppes in the western Songnen Plain. (English) |
| المؤلفون: |
WANG Ming, LIU Xing-tu, LI Xiu-jun, ZHANG Ji-tao, WANG Guo-dong, LU Xin-rui, LI Xiao-yu |
| المصدر: |
Yingyong Shengtai Xuebao; Jan2014, Vol. 25 Issue 1, p45-52, 8p |
| مستخلص: |
In order to accurately explore the soil respiration dynamics and its controlling factors of typical vegetation types in the western Songnen Plain, soil respiration rates of Chloris virgata, Puccinellia distans, Phragmites australis and Leymus chinensis communities were measured. The results showed that the diurnal curves of soil respiration rates of the four vegetation communities had simple peak values, which appeared at 11:00-15:00, and the valley values occurred at 21:00-1:00 or 3:00-5:00. The seasonal dynamic patterns of their soil respiration rates were similar, with the maximum (3. 21-4. 84 μmol CO2 · m-2 · s-1 ) occurring in July and August and the minimum (0. 46-1. 51 μmol CO2 · m-2 · s-1 ) in October. The soil respiration rates of the four vegetation communities had significant exponential correlations with ambient air temperature and soil temperature. Soil moisture, however, only played an important role in affecting the soil respiration rate of C. virgata community while air humidity near the soil surface was significantly correlated with the soil respiration rates of P. australis and L. chinensis communities. The soil salt contents seriously constrained the CO2 dioxide emission, and the soil pH, electrical conductivity (EC), exchangeable sodium percentage (ESP) could explain 87% -91% spatial variations of the soil respiration rate. [ABSTRACT FROM AUTHOR] |
|
Copyright of Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Supplemental Index |
