盐生荒漠土壤CO2通量及其环境影响因素

生态学杂志

• 干旱区盐碱土碳过程专栏 • 上一篇下一篇

盐生荒漠土壤CO₂通量及其环境影响因素

马杰^1,2,3,于丹丹^3,4,郑新军^1,2**

(¹中国科学院新疆生态与地理研究所，荒漠与绿洲国家重点实验室，乌鲁木齐 830011； ^2中国科学院阜康荒漠生态系统国家站，新疆阜康 831505； ³中国科学院大学，北京 100049； ⁴中国科学院沈阳应用生态研究所，沈阳 110016)

出版日期:2013-10-10 发布日期:2013-10-10

Soil CO₂ flux and its environmental affecting factors in a saline desert.

MA Jie^1,2,3, YU Dan-dan^3,4, ZHENG Xin-jun^1,2**

(¹State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China; ^2Fukang Station of Desert Ecology, Chinese Academy of Sciences, Fukang 831505, Xinjiang, China; ^3University of Chinese Academy of Sciences, Beijing 100049, China; ⁴Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China)

Online:2013-10-10 Published:2013-10-10

摘要/Abstract

摘要：

以古尔班通古特沙漠南缘原始盐生荒漠为对象，利用LI-8150多通道土壤CO₂通量系统对原始盐生荒漠多枝柽柳群落地表CO₂通量进行连续观测，探讨土壤CO₂通量的日、季变化及其环境影响因素。结果表明：1）在整个生长季内，盐生荒漠土壤CO₂通量呈现2种不同的日变化过程，一种为单峰型，另一种为双峰型，推断引起土壤CO₂通量日过程差异的主要原因是高温抑制了微生物的活性；2）土壤CO₂通量的季节变化不明显，尤其是当日过程为双峰型时，土壤CO₂通量基本在一个较稳定的区间（0.13～0.3 g C·m^-2·d^-1）波动,伴随降雨事件的发生，土壤CO₂通量呈“脉冲式”增加；3)在整个降雨周期，土壤呼吸的日过程也呈现出双峰-单峰-双峰的变化过程。本研究表明，水分是盐生荒漠土壤CO₂通量的主要限制因子。

关键词: DNA损伤, 彗星试验, 组织损伤, 真鲷, 溴氰菊酯

Abstract: Taking the southern Gurbantunggut Desert in Xinjiang as the object, and by using LI-8150 multichannel soil CO₂ flux system, a continuous measurement of surface soil CO₂ flux under Tamarix ramosissima population in an original saline desert was conducted during growth season, with the diurnal and seasonal variations of the CO₂ flux and related environmental affecting factors analyzed. During the whole growth season of the population, the diurnal variation of the CO₂ flux presented two distinct patterns, one was single-peaked, and the other was bimodal. The difference in the diurnal variation of the CO₂ flux could be mainly caused by the inhibition of soil microbial activity by high temperature. The seasonal variation of the CO₂ flux was not apparent, being fluctuated within a stable range (0.13-0.3 g C·m^-2·d^-1) especially when the diurnal variation was bimodal. When rainfall events happened, the CO₂ flux increased in impulse type. During the rainfall cycle, the diurnal CO₂ flux varied in bimodal-singlepeaked-bimodal type. Soil moisture content was the main factor limiting the soil CO₂ flux in the saline desert.

Key words: DNA damage., tissue damage, Pagrosomus major, deltamethrin, comet assay

马杰1,2,3,于丹丹3,4,郑新军1,2**. 盐生荒漠土壤CO₂通量及其环境影响因素[J]. 生态学杂志.

MA Jie1,2,3, YU Dan-dan3,4, ZHENG Xin-jun1,2**. Soil CO₂ flux and its environmental affecting factors in a saline desert.[J]. cje.

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盐生荒漠土壤CO₂通量及其环境影响因素

Soil CO₂ flux and its environmental affecting factors in a saline desert.

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