Simulated Acid Rain Accelerates Litter Decomposition and Enhances the Allelopathic Potential of the Invasive Plant Wedelia trilobata (Creeping Daisy)
Simulated Acid Rain Accelerates Litter Decomposition and Enhances the Allelopathic Potential of the Invasive Plant Wedelia trilobata (Creeping Daisy)
复制标题
模拟酸雨加速凋落物分解并增强入侵植物蟛蜞菊（匍匐雏菊）的化感潜力
DOI：
10.1614/ws-d-12-00016.1
复制
发表时间：
2012-08
期刊：
影响因子：
2.5
通讯作者：
Zeng, Ren Sen
中科院分区：
文献类型：
--
作者：
Wang, Rui Long;Staehelin, Christian;Dayan, Franck E.;Song, Yuan Yuan;Su, Yi Juan;Zeng, Ren Sen
物种入侵和酸雨造成了全球性的环境问题。匍匐雏菊是一种外来化感杂草，在酸雨多发的中国南方地区造成了严重的危害。研究了模拟酸雨（SAR）的酸度对土壤养分、匍匐雏菊凋落物分解和周围土壤化感电位的影响。用不同酸度（pH 2.5、4.0、5.6）的SAR处理凋落物，或用水（pH 7.0）作为对照。70 d后，测定匍匐雏菊凋落物残留量、周围土壤养分含量和化感电位。凋落物分解与土壤酸度的增加成正比，随土壤酸度的增加，凋落物周围土壤总碳、总氮、硝态氮和速效磷含量增加，NH4+-N水平、C/N比值和土壤pH值降低，含水量先升高后降低，而速效钾含量变化不显著。以大头菜和萝卜幼苗生长情况为研究对象。综上所述，酸雨影响了土壤养分状况，加速了匍匐雏菊凋落物的分解，增强了其凋落物对周围土壤的化感作用，表明酸雨可能增强了匍匐雏菊植物的入侵能力。名称：匍匐雏菊，Wedelia trilobata （L.）Hitchc。芜菁，油菜；萝卜；萝卜；
Abstract Invasive species and acid rain cause global environmental problems. Creeping daisy, an invasive exotic allelopathic weed, has caused great damage in southern China, where acid rain is prevalent. The impact of the acidity of simulated acid rain (SAR) on soil nutrients, the decomposition of creeping daisy litter, and on the allelopathic potential of the surrounding soils was investigated. Litter was treated with SAR at different acidity (pH 2.5, 4.0, 5.6) or with water (pH 7.0) as a control. After 70 d, the remaining amount of creeping daisy litter, nutrient contents, and allelopathic potentials in the surrounding soil were determined. The litter decomposition was commensurate to the increase in the acidity of the SAR. Total C and N contents, NO3−-N and available P increased, levels of NH4+-N, the ratio of C/N and soil pH values decreased, water contents increased and then decreased, whereas available K did not significantly change in the soil surrounding the litters in response to the increase in the acidity of the SAR. Bioassays showed that SAR promoted the allelopathic activity in the soil surrounding the litter, as measured by seedling growth of turnip and radish. In conclusion, our results indicated that SAR influenced soil nutrient status, accelerated creeping daisy litter decomposition, and enhanced the allelopathic potential of its litter in the surrounding soil, suggesting that acid rain may enhance the invasiveness of creeping daisy plants. Nomenclature: Creeping daisy, Wedelia trilobata (L.) Hitchc.; turnip, Brassica campestris L.; radish, Raphanus sativus L.
登录
查看更多内容
影响因子：
1.1
作者：
Jeffrey J. Lee;D. Weber
通讯作者：
Jeffrey J. Lee;D. Weber
DOI：
--
发表时间：
1954
期刊：
--
影响因子：
--
作者：
S. R. Olsen
通讯作者：
S. R. Olsen
影响因子：
9.7
作者：
Kourtev, PS;Ehrenfeld, JG;Häggblom, M
通讯作者：
Häggblom, M
影响因子：
2.5
作者：
Bainard, L. D.;Brown, P. D.;Upadhyaya, M. K.
通讯作者：
Upadhyaya, M. K.
影响因子：
9.7
作者：
Dick, WA;Cheng, L;Wang, P
通讯作者：
Wang, P