干旱区生态环境知识资源中心(Arid): N and P resorption in a pioneer shrub (Artemisia halodendron) inhabiting severely desertified lands of Northern China

Arid

	N and P resorption in a pioneer shrub (Artemisia halodendron) inhabiting severely desertified lands of Northern China
	Li Yulin; Jing Chen; Mao Wei; Cui Duo; Wang Xinyuan; Zhao Xueyong
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2014
卷号	6 期号:2 页码:174-185
英文摘要	Nutrient resorption is an important conservation mechanism for plants to overcome nutrient limitation in the less fertile area of desertified land. In the semi-arid Horqin Sandy Land of Northern China, the shrub Artemisia halodendron usually colonizes into the bare ground of severely desertified land as a pioneer species. It is, therefore, expected that A. halodendron will be less dependent on current nutrient uptake through efficient and proficient resorption of nutrients. In this study, we found that averaged nitrogen (N) and phosphorus (P) concentrations in senesced leaves significantly varied from 12.3 and 1.2 mg/g in the shifting sand dune to 15.9 and 1.9 mg/g in the fixed sand dune, respectively, suggesting that foliar N and P resorption of A. halodendron were more proficient in the shifting sand dune. In particular, positive relationships between nutrient concentrations in senesced leaves and soil nutrient availability indicate that A. halodendron in infertile habitats is more likely to manage with a low level of nutrients in senesced leaves, giving this species an advantage in infertile soil. Moreover, foliar N- and P-resorption efficiencies and proficiencies showed limited inter-annual variability although annual precipitation varied greatly among 2007-2009. However, N and P resorption of A. halodendron were not more efficient and proficient than those previously reported for other shrubs, indicating that the pioneer shrub in sand dune environments does not rely more heavily than other plants on the process of resorption to conserve nutrients. Incomplete resorption of nutrients in A. halodendron suggests that senesced-leaf fall would return litter with high quality to the soil, and thereby would indirectly improve soil nutrient availability. The restoration of desertified land, therefore, may be accelerated after A. halodendron pioneers into shifting sand dunes.
英文关键词	foliar nutrient concentration nutrient-resorption efficiency nutrient-resorption proficiency senesced vs. green leaves desertification soil nutrient availability
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5044768
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335310
作者单位	Li Yulin, Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Jing Chen, Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Mao Wei, Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Cui Duo, Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Wang Xinyuan, Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Zhao Xueyong, Naiman Desertification Research Station, Cold and Arid Regions Environmental and Enginee...
推荐引用方式 GB/T 7714	Li Yulin,Jing Chen,Mao Wei,et al. N and P resorption in a pioneer shrub (Artemisia halodendron) inhabiting severely desertified lands of Northern China[J],2014,6(2):174-185.
APA	Li Yulin,Jing Chen,Mao Wei,Cui Duo,Wang Xinyuan,&Zhao Xueyong.(2014).N and P resorption in a pioneer shrub (Artemisia halodendron) inhabiting severely desertified lands of Northern China.Journal of Arid Land,6(2),174-185.
MLA	Li Yulin,et al."N and P resorption in a pioneer shrub (Artemisia halodendron) inhabiting severely desertified lands of Northern China".Journal of Arid Land 6.2(2014):174-185.