Enclosure increases nutrient resorption from senescing leaves in a subalpine pasture
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Enclosure increases nutrient resorption from senescing leaves in a subalpine pasture Weibin Li & Guozhu Huang & Hongxia Zhang
Received: 7 July 2020 / Accepted: 4 October 2020 # Springer Nature Switzerland AG 2020
Abstract Aim Nutrient resorption from senescing tissues is the most critical nutrient source for plants in degradation grasslands, playing critical roles to primary productivity and interspecies competitiveness. Hence within-species and among-species variation Responsible Editor: Alfonso Escudero. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04733-8) contains supplementary material, which is available to authorized users. W. Li : G. Huang State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China W. Li : G. Huang Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China W. Li : G. Huang Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China H. Zhang (*) Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China e-mail: [email protected] H. Zhang University of Chinese Academy of Sciences, Beijing 100049, China
of nutrient resorption is one of the mechanisms explaining the increasing productivity and decreasing biodiversity after enclosure. Yet, the response of plant nutrient resorption to enclosure remains poorly documented. Methods We conducted a 6-year manipulative field study to estimate the effects of enclosure on nutrient resorption efficiency in five dominant species in a degraded subalpine pasture. Results Both soil, mature and senesced leaves showed significant increases in N, P, and K contents in response to enclosure. Despite some speciesspecific differences, enclosure generally increased the nutrient resorption in graminoids, but decreased in forbs (with the exception of phosphorus for Potentilla anserine), indicating an important difference in the adaptation of plant functional types to enclosure which may in turn strongly impact the productivity and structure of pasture vegetation under longterm enclosure. Conclusions This study shows the positive effects of enclosure management on soil and plant nutrients accumulation, and our results highlight the importance of among-species and within-species variations in plant nutrient resorption to explain the effects of enclosure on biodiversity loss and productivity increase in a degraded ecosystem.
Keywords Ecosystem functioning . Grazing . Intraspecific variation . Plant nutrient . Resorption efficiency . Senesced leaves
Plant Soil
Introduction Nitrogen (N), phosphorus (P), and potassium (K) are critical component of plant nu
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