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Forests 2018, 9(9), 563; https://doi.org/10.3390/f9090563

Distribution Changes of Phosphorus in Soil–Plant Systems of Larch Plantations across the Chronosequence

1
Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Received: 23 August 2018 / Revised: 5 September 2018 / Accepted: 11 September 2018 / Published: 13 September 2018
(This article belongs to the Special Issue Carbon, Nitrogen and Phosphorus Cycling in Forest Soils)
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Abstract

Phosphorus (P) is one of the most important factors influencing the growth and quality of larch plantations. A systematic knowledge of the dynamic changes of P in soil–plant systems can provide a theoretical basis for the sustainable development of larch plantations. We determined the concentration, biomass, and accumulation of P in five tree components (i.e., leaf, branch, bark, stem, and root), and the concentrations of various soil P fractions of larch plantations in 10-, 25-, and 50-year-old stands in northeast China. Our results showed that the N:P ratio and P concentration in leaves increased with stand age, indicating that the growth of larch plantations might be limited by P in the development of stands. The N:P ratio and P concentration in roots, and P resorption efficiency, increased with stand age, indicating the use efficiency of P could be enhanced in older stands. The concentrations of soil-labile P fractions (Resin-P, NaHCO3-Pi, and NaHCO3-Po) in 25- and 50-year-old stands were significantly lower than those in 10-year-old stands, indicating the availability of soil P decreases with the development of larch plantations. View Full-Text
Keywords: leaf N:P ratio; P resorption efficiency; soil P fractions; P stock; stand age leaf N:P ratio; P resorption efficiency; soil P fractions; P stock; stand age
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Zeng, F.; Chen, X.; Huang, B.; Chi, G. Distribution Changes of Phosphorus in Soil–Plant Systems of Larch Plantations across the Chronosequence. Forests 2018, 9, 563.

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