Fate of ^<15>N derived from soil decomposition of abscised leaves and pruning wood from apple (Malus domestica) trees(Soil Fertility)

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概要

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• The fate of nitrogen (N) derived from soil incorporating ^<15>N-labeled apple (Malus domestica) leaves and wood from pruning (hereafter referred to as "pruning wood") was studied in an 8-month pot experiment. The net mineralization of N was measured as ^<15>N recovery in perennial ryegrass (Lolium perenne) that was allowed to grow in soils amended with residues <2mm in size (litter: soil ratio, w/w, 1: 250 for leaves and 1: 330 for wood). The immobilization of native soil N as a consequence of residue addition was measured by comparing the amount of total N taken up by ryegrass in residue-amended soil and in control soil. Net immobilization of soil N occurred during the first 2 months after litter addition and was especially high in the soil amended with leaf litter. During the period of soil N immobilization, the amount of soil microbial N was high in the soils treated with both types of residues, while that of mineral N was markedly reduced only in the leaf-litter-amended soil. Net N uptake from the control soil almost stopped after 3 months of plant growth, while ryegrass in the litter-amended soil continued to take up N, indicating a likely release of previously immobilized N. Net mineralization of the ^<15>N from apple residues was slow during the first 2 months after their incorporation and then increased. In total, 6% (leaves) and 12% (wood) of the N added via residues underwent mineralization, while 67% (leaves) and 85% (wood) were found in the extractable soil N pool (humic and fulvic acids and non-humified fractions). The data indicated that, even if N was incorporated into the soil, apple leaves and pruning wood did not mineralize significant amounts of N in the short term. The evidence suggested that during the decomposition of both types of apple residues the N originally present was incorporated into the stable soil N pool.

• 社団法人日本土壌肥料学会の論文

著者

• Tagliavini Massimo

  Dipartimento Di Colture Arboree Viale Fanin 46 Bologna University

• Tagliavini Massimo

  Dipartimento Di Colture Arboree Universita Di Bologna

• Solimando Domenico

  Dipartimento Di Colture Arboree Viale Fanin 46 Bologna University

• TONON Giustino

  Dipartimento di Colture Arboree, Viale Fanin 46, Bologna University

• CIAVATTA Claudio

  Dipartimento di Scienze e Tecnologie Agroambientali, Bologna University

• GIOACCHINI Paola

  Dipartimento di Scienze e Tecnologie Agroambientali, Bologna University

• Tonon Giustino

  Dipartimento Di Colture Arboree Viale Fanin 46 Bologna University

• Gioacchini Paola

  Dipartimento Di Scienze E Tecnologie Agroambientali Bologna University

• Ciavatta Claudio

  Dipartimento Di Scienze E Tecnologie Agroambientali Bologna University

関連論文

• Technologies for the Diagnosis and Remediation of Fe Deficiency
• Fate of ^N derived from soil decomposition of abscised leaves and pruning wood from apple (Malus domestica) trees(Soil Fertility)

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