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Surface crop residue effects on fungal hyphal length, soil organic carbon and soil moisture in oat (Avena sativa) plots.

机译:在燕麦(Avena sativa)地块中,表层作物残渣对真菌菌丝长度,土壤有机碳和土壤水分的影响。

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摘要

Oats (Avena sativa) were grown in outdoor plots in southern Ontario in 2003 and 2004 to determine if fungal hyphae growth associated with surface residue increased soil moisture and OC through soil aggregation and if the type of residue (oat straw, mixed hay, corn stalks, compost) and plant cover (weeds, alfalfa, oats) altered fungal growth and the soil physical properties as well. OC increased significantly with dried surface residue and alfalfa ground cover over the season of the oat crop in 2003 while the oat plants had a greater effect than surface residue on OC in 2004. Soil moisture and aggregation were increased from straw and corn residue in 2004, but were reduced by the growing oat crop. Hyphal length increased only with interaction of the oat plants and residue in August, 2004 from the 2-way ANOVA analysis. The study results suggest that resistance to decomposition with high residue C/N and surface application is more important to soil OC than the amount of decomposition in moist, sandy, high OC soil conditions.;Keywords. Soil organic carbon, macroaggregates, mycorrhiza, fungal hyphae, surface residue, soil moisture, density fractions, oats, no-till.
机译:燕麦( Avena sativa )分别于2003年和2004年在安大略省南部的室外田地上种植,以确定与土壤残留物相关的真菌菌丝生长是否通过土壤聚集增加了土壤水分和OC,以及残留物的类型(燕麦)稻草,混合干草,玉米秸秆,堆肥)和植物覆盖物(杂草,苜蓿,燕麦)也改变了真菌的生长和土壤的物理性质。在2003年的整个燕麦季节,OC值随地表残留和苜蓿地表干的干燥而显着增加,而2004年燕麦植物对OC的影响大于表层残留。2004年,秸秆和玉米残留物中的土壤水分和聚集增加,但由于燕麦作物的生长而减少。根据2向ANOVA分析,菌丝长度仅随着2004年8月燕麦植物和残渣的相互作用而增加。研究结果表明,高残留碳氮比和表面施用对土壤有机碳的分解比在潮湿,沙质,高有机碳土壤条件下的分解量更为重要。关键词。土壤有机碳,大骨料,菌根,真菌菌丝,表面残留物,土壤水分,密度分数,燕麦,免耕法。

著录项

  • 作者

    Manns, Hida Rosemary.;

  • 作者单位

    Trent University (Canada).;

  • 授予单位 Trent University (Canada).;
  • 学科 Agriculture Agronomy.;Agriculture Soil Science.;Agriculture Plant Pathology.
  • 学位 M.Sc.
  • 年度 2006
  • 页码 124 p.
  • 总页数 124
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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