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Temporal variations in phosphorus fractions and phosphatase activities in rhizosphere and bulk soil during the development of Larix olgensis plantations

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Many studies have well reported nutrient deficiency and soil degradation focusing on soil N in
pure plantations. However, few papers focused on soil P deficiency during pure plantation afforestation.
We examined the variations in P fractions and phosphatase (P-ase) activities in the
rhizosphere and bulk soils in Larix olgensis plantations of 16, 23, 34, and 49 y. Correlation analysis
was applied to identify the relationships between available P and other P fractions and P-ase
activities in the rhizosphere soil at different developmental stages. The stepwise regression models
were established to explore their relationships with tree growth. The results showed that the
deficiency of available P occurred in the rhizosphere micro-region relative to the bulk soil in the
34- and 49-y-old stands, which was related to the lower acid phosphatase activity, the deficient
Fe-bound P, and occluded phosphate, as well as to soil pH in the rhizosphere soil during these
periods. In addition, tree growth in the young and near-mature stands was significantly correlated
with soil P fractions, and the main P fractions closely related to tree growth were total P, organic
P, available P and inorganic P, followed by Ca-bound P and Fe-bound P. The decreases in average
DBH and average height growth in the near-mature stand were related to the deficiency of
available P in this period. Our results indicate that the development of Larix olgensis plantations
affects the bioavailability of P through dynamic changes of P fractions and P-ase activities, which
provides a theoretical base in future afforestation with Larix olgensis plantations.

Key words: phosphorus fraction / phosphatase activity / bioavailability / stand age / tree growth

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Ketersediaan

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Informasi Detail

Judul Seri

J. Plant Nutr. Soil Sci.

No. Panggil

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Penerbit

New York : WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim., 2016

Deskripsi Fisik

J. Plant Nutr. Soil Sci. 2016, 179, 67–77

Bahasa

English

ISBN/ISSN

DOI: 10.1002/jpln.20

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2016, 179

Subjek

PERTANIAN.

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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