Effects of herbicides, glyphosate, on density and casting activity of earthworm, Pheretima (Amynthas) carnosus
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- KANEDA Satoshi
- Tohoku Agic. Res. Cent.:(Present office)Natl. Inst. Agro-Environ. Sci.
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- OKANO Seigo
- 東北農業研究センター
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- URASHIMA Yasuhumi
- 東北農業研究センター
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- MURAKAMI Toshihumi
- 東北農業研究センター
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- NAKAJIMA Miyuki
- 東北農業研究センター
Bibliographic Information
- Other Title
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- 除草剤(グリホサート系)散布が不耕起畑のヨコハラトガリミミズの生息密度及び糞排泄速度に及ぼす影響
- ジョソウザイ グリホサートケイ サンプ ガ フコウキバタケ ノ ヨコハラトガリミミズ ノ セイソク ミツド オヨビ フン ハイセツ ソクド ニ オヨボス エイキョウ
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Abstract
Effects of an herbicide, commercial formulation of glyphosate (Roundup), on earthworm cast production on the surface in no-tillage field were investigated by using field and pot experiments. Direct impacts of the herbicide on earthworm mortality, growth and behavior were examined in pot experiment. In field experiments, effects of the herbicide on earthworm density, earthworm casting activity and soil moisture, and effects of litter removing after an application of herbicide on earthworm casting activities. Three treatments, glyphosate application on fall, application on spring, and no application, were set up in no-till field for the experiment, herbicide impacts on earthworm activity and behavior. Separately three treatments, litter removal treatment after herbicide application, just herbicide application and control, were set up for the experiment, litter removal impact on casting activity. No herbicide impacts on earthworm density were observed, and only one species, Pheretima (Amynthas) carnosus was dominated (95%) in the experiment field. There was no effect of applying herbicide on growth, mortality and behavior of the dominated earthworm in the pot experiment. Herbicide application induced not only increasing earthworm casting activity in spring (p<0.05) and also decreasing the activity in summer (p<0.05). Multiple linear regression analysis revealed that the soil temperature and the soil moisture were important factors for the earthworm cast production rate (p<0.01). Importance of surface litter for the casting activity was observed (p<0.05). This earthworm species produced around 3kg m^<-2> per year in no-till system. From these results, the herbicide did not have direct harmful impacts on the earthworm, but would effect on earthworm casting activity through variation of environmental factors, such as litter amount, soil temperature, and soil moisture.
Journal
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- Japanese Journal of Soil Science and Plant Nutrition
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Japanese Journal of Soil Science and Plant Nutrition 80 (5), 469-476, 2009
Japanese Society of Soil Science and Plant Nutrition
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Details 詳細情報について
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- CRID
- 1390001206558205952
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- NII Article ID
- 110007504068
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- NII Book ID
- AN00195767
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- ISSN
- 24240583
- 00290610
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- NDL BIB ID
- 10462897
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed