Root decomposition of Artemisia halodendron and its effect on soil nitrogen and soil organic carbon in the Horqin Sandy Land, northeastern China
Root decomposition of Artemisia halodendron and its effect on soil nitrogen and soil organic carbon in the Horqin Sandy Land, northeastern China
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科尔沁沙地卤蒿根系分解及其对土壤氮和有机碳的影响
DOI：
10.1007/s11284-016-1362-y
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发表时间：
2016-04
影响因子：
2
通讯作者：
王涛
中科院分区：
文献类型：
--
作者：
罗永清;赵学勇;李玉强;左小安;连杰;王涛
根分解是植物对土壤的重要反馈，特别是在强风吹走地上凋落物的沙地上。作为科尔沁沙地半移动沙丘上的先锋灌木，黄花蒿在养分捕获和微环境方面具有多重作用。但其根系分解对土壤有机碳（SOC）和氮(N)的影响尚未得到研究。在本研究中，我们将细根（≤2mm）和粗根埋在半移动沙丘下方15 cm深的垃圾袋中。在434天的分解过程中，我们每隔一段时间测量一次剩余质量和C、N含量。然后对垃圾袋下方的土壤进行分层取样，测定其有机碳和氮含量。粗根和细根经过快速的初期分解后，分解缓慢。53 d后，36.2%粗根和39.8%细根腐烂。相比之下，粗根和细根在381 d内腐烂率分别为18.4%和30.5%。细根的分解速度显著加快，且初始快速腐烂后的分解速率与气候有很强的相关性（R2= 0.716, p0.05）。根系分解提高了凋落物袋下土壤有机碳和氮含量，对细根的影响更大。土壤有机碳含量比氮含量变化更大。因此，a分解。在研究植物对土壤的有机碳和氮反馈时，尤其是细根，不能忽视盐枝根。
Root decomposition is a critical feedback from the plant to the soil, especially in sandy land where strong winds remove aboveground litter. As a pioneer shrub in semi‐mobile dunes of the Horqin sandy land,Artemisia halodendronhas multiple effects on nutrient capture and the microenvironment. However, its root decomposition has not been studied in terms of its influence on soil organic carbon (SOC) and nitrogen (N). In this study, we buried fine (≤2 mm) and coarse roots in litterbags at a depth of 15 cm below semi‐mobile dunes. We measured the masses remaining and the C and N contents at intervals during 434 days of decomposition. The soils below the litterbags were then divided into layers and sampled to measure the SOC and N contents. After rapid initial decomposition, both coarse and fine roots decomposed slowly. After 53 days, 36.2 % of coarse roots and 39.8 % of fine roots had decomposed. In contrast, only 18.4 % of coarse roots and 30.5 % of fine roots decomposed in the following 381 days. Fine roots decomposed significantly faster, and their decomposition rate after the initial rapid decay was strongly related to climate (R2= 0.716,P 0.05). Root decomposition increased SOC and N contents below the litterbags, with larger effects for fine roots. The SOC content was more variable between soil layers than the N content. Thus, decomposition ofA. halodendronroots cannot be ignored when studying SOC and N feedbacks from plants to the soil, particularly for fine roots.
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影响因子：
4.9
作者：
Weixing Zhu;J. Ehrenfeld
通讯作者：
Weixing Zhu;J. Ehrenfeld
影响因子：
3.1
作者：
J. Juston;O. Andrén;T. Kätterer;P. Jansson
通讯作者：
J. Juston;O. Andrén;T. Kätterer;P. Jansson
DOI：
10.5860/choice.31-3799
发表时间：
2013-01
期刊：
--
影响因子：
--
作者：
S. Pal
通讯作者：
S. Pal
影响因子：
9.7
作者：
B. Zhu;B. Zhu;J. Gutknecht;J. Gutknecht;D. Herman;D. Keck;D. Keck;M. Firestone;W. Cheng
通讯作者：
B. Zhu;B. Zhu;J. Gutknecht;J. Gutknecht;D. Herman;D. Keck;D. Keck;M. Firestone;W. Cheng
极细根的缓慢分解和控制该过程的一些因素：对四种温带树种进行的为期 4 年的实验
影响因子：
4.9
作者：
Sun, Tao;Mao, Zijun;Han, Yingying
通讯作者：
Han, Yingying