Influences of leaf litter replacement on soil biochemical characteristics of main planted forests in Qinling Mountains of China

doi:10.1007/s11703-009-0049-3

Front Agric Chin

2009, Vol. 3

Issue (3) : 346-352 https://doi.org/10.1007/s11703-009-0049-3

RESEARCH ARTICLE

Influences of leaf litter replacement on soil biochemical characteristics of main planted forests in Qinling Mountains of China

Zengwen LIU(

), Erjun DUAN, Wenjun GAO

College of Resources and Environment, Northwest A & F University, Yangling 712100, China

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Abstract

Long-term continuous growth of the same tree species in planted pure forest will lead to soil polarization and degradation. Mixed forestation or litter replacement between different needle- and broad-leaved forests are effective measures, except fertilization, to control soil polarization according to the mutual compensation principle of different tree species. Through a two-year leaf litter replacement experiment in 4 typical planted pure forests of Larix kaempferi, Pinus tabulaeformis, Catalpa fargesii and Quercus aliena var. acuteserrata in Qinling Mountains of China, influences of leaf litter replacement on soil biochemical characteristics and their interspecific relationships were studied and main conclusions were reached as follows. (1) Annual leaf litter decomposition rate of broad-leaved forests was 33.70 % higher than those of needle-leaved forests and increased by 8.35%-12.15% when needle-leaved litter was replaced with broad-leaved forests, whereas it decreased by 5.38%-9.49% when broad-leaved litter was replaced with needle-leaved forests. (2) Leaf litter replacement between needle- and broad-leaved forests popularly raised the contents of organic C, available N, P and K in soil, whose content increments in the needle-leaved forests (8.70%-35.84%) were obviously more than those in the broad-leaved forests (3.73%-10.44%), and in the former, the content increments after replacement with the litter of Catalpa fargesii (24.63%-35.84%) were more than those after replacement with the litter of Quercus aliena var. acuteserrata (8.70%-28.15%). Furthermore, the litter replacement was found to make the soil pH of needle-leaved forests developed from light-acid to neutral. (3) Litter replacement of the needle-leaved forests with the broad-leaved litter popularly raised enzyme activities, amounts of microorganisms and contents of micro-biomass C and N in soil, the increments of which after replacement with the litter of Catalpa fargesii were also more than those after replacement with the litter of Quercus aliena var. acuteserrata; while the litter replacement of broad-leaved forests with needle-leaved litter resulted differently depending upon the tree species. Among them, the soil enzyme activities and contents of micro-biomass C and N in the forest of Quercus aliena var. acuteserrata raised while they lowered in the forest of Catalpa fargesii.

Keywords planted forest soil degradation litter replacement litter decomposition biochemical properties of soil interspecific relationship

Corresponding Author(s): LIU Zengwen,Email:zengwenliu2003@yahoo.com.cn

Issue Date: 05 September 2009

Cite this article:

Zengwen LIU,Erjun DUAN,Wenjun GAO. Influences of leaf litter replacement on soil biochemical characteristics of main planted forests in Qinling Mountains of China[J]. Front Agric Chin, 2009, 3(3): 346-352.

URL:

https://academic.hep.com.cn/fag/EN/10.1007/s11703-009-0049-3
https://academic.hep.com.cn/fag/EN/Y2009/V3/I3/346

Tab.1 Experimental forests

Tab.2 Influences of leaf litter replacement on its decomposition rate

Tab.3 Influences of leaf litter replacement on pH and content of nutrients in soil

Tab.4 Influences of leaf litter replacement on soil enzyme activities and micro-biomass C and N

Tab.5 Influences of leaf litter replacement on the amount of microbiomes

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