エダマメの生育に及ぼす植物茎葉残渣マルチの影響

概要

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Differences in the mulching effects between plant residues and polyethylene film on soybean growth and physicochemical properties was investigated in a field experimant. 1)Both mulching of plant residues and polyethylene film resulted in an increase in soybean growth. Moreover, the mulching effect on pod yield was larger in plant residue mulching than that of polyethylene film, except mugwort residue mulching, and the highest growth and pod yield were obtained in the mulching with corn residue. 2)The distribution of dry matter to pods was significantly reduced by mulching with polyethylene film, while it was not reduced by plant residues mulch. 3)Minimum soil temperature was higher in the order of plant residues mulch>polyethylene film mulch>control(no mulching), and mulching with plant residue raised the soil temperature by about 3℃ during the early stage of soybean growth. 4)The water potential in unmulched soil suddenly increased, while the values in mulched soil with polyethylene film and corn residue mulch did not increase even in the dry period of growth. 5)The contents of available phosphorus in soil significantly increased in mulched soil with plant residues compared with polyethylene film and unmulched soil. The effect was markedly higher in the mulched soil with corn residue.
社団法人日本土壌肥料学会の論文
1996-02-05