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Abstract <p>Residue decomposition is a crucial biogeochemical process linking nutrient cycling and nutrient availability in low-input production systems, but few studies have investigated this process, where tree leaf residues were mixed with legume crop residues. Therefore, we investigated the decomposition dynamics of surface applied individual and mixed leaf residues of <i>Trifolium repens</i> and <i>Populus ciliata</i> leaf residues in their own soil and arable soil under laboratory incubation conditions. Surface soil was collected from an arable field, <i>Trifolium repens</i> field and from <i>Populus ciliata</i> tree stand. The experimental setup was based on two factors, i.e., treatments and incubation periods. Treatments were (a) T<sub>1</sub> = clover soil + clover leaves; T<sub>2</sub> = arable soil + clover leaves; T<sub>3</sub> = poplarpoplar soil + poplar leaves; T<sub>4</sub> = arable soil + poplar leaves; T<sub>5</sub> = arable soil + clover leaves + poplar leaves (b) seven incubation periods i.e., 0, 15, 30, 45, 60 and 75 days. The incubated soil jars were removed after 15, 30, 45, 60 and 75 days to determine mass loss, total organic carbon and nitrogen of leaf residues and soil organic carbon, soil mineral nitrogen and soil pH. White clover leaf residues decomposed faster compared to poplar leaf residues both in native and arable soil. Compared to single-species residue, mixed residues accelerated residue decomposition. The residue quality, residue mixing, and soil play important roles in residue decomposition. This suggests that increased knowledge of residue quality would greatly help in better understanding of the mixed residue decomposition dynamics away from their environment.</p>

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Decomposition Dynamics of Surface Applied Individual and Mixed Trifolium and Populus Leaf Residues

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • M. M. Tahir,
  • J. Mushtaq,
  • A. Khaliq,
  • K. Mehmood,
  • M. Shehzad

摘要

Abstract

Residue decomposition is a crucial biogeochemical process linking nutrient cycling and nutrient availability in low-input production systems, but few studies have investigated this process, where tree leaf residues were mixed with legume crop residues. Therefore, we investigated the decomposition dynamics of surface applied individual and mixed leaf residues of Trifolium repens and Populus ciliata leaf residues in their own soil and arable soil under laboratory incubation conditions. Surface soil was collected from an arable field, Trifolium repens field and from Populus ciliata tree stand. The experimental setup was based on two factors, i.e., treatments and incubation periods. Treatments were (a) T1 = clover soil + clover leaves; T2 = arable soil + clover leaves; T3 = poplarpoplar soil + poplar leaves; T4 = arable soil + poplar leaves; T5 = arable soil + clover leaves + poplar leaves (b) seven incubation periods i.e., 0, 15, 30, 45, 60 and 75 days. The incubated soil jars were removed after 15, 30, 45, 60 and 75 days to determine mass loss, total organic carbon and nitrogen of leaf residues and soil organic carbon, soil mineral nitrogen and soil pH. White clover leaf residues decomposed faster compared to poplar leaf residues both in native and arable soil. Compared to single-species residue, mixed residues accelerated residue decomposition. The residue quality, residue mixing, and soil play important roles in residue decomposition. This suggests that increased knowledge of residue quality would greatly help in better understanding of the mixed residue decomposition dynamics away from their environment.