Effects of tillage and winter cover cropping on microbial substrate-induced respiration and soil aggregation in two Japanese fields(Soil Fertility)
スポンサーリンク
概要
- 論文の詳細を見る
We hypothesized that cover cropping could increase soil microbial activities under various tillage systems and that increased microbial activities would improve soil properties. Soil sampling was conducted at two fields in Japan in 2009. At the Ibaraki field (Andosol, clay loam), three tillage practices (no-tillage, plowing to 30 cm, and rotary tillage to 15 cm) and three types of winter cover cropping [bare fallow as control, hairy vetch (Vicia villosa Roth), and rye (Secale cereale L.)] were conducted from 2003 to 2009. At the Hokkaido field (Fluvisol, light clay), two tillage practices (autumn tillage and rotary tillage with a rotary tiller to a depth of 15 cm once in autumn and twice in a year, respectively), and four types of winter cover cropping (bare fallow, hairy vetch, bristle oat (Avena strigosa L.), and a mixture of hairy vetch and bristle oat) were conducted from 2006 to 2009. Soil microbial activities and the fungal-to-bacterial activity ratio (F/B ratio) were estimated by the substrate-induced respiration (SIR) method with the use of selective antibiotics. At the Ibaraki field, rye cover cropping showed higher microbial SIR than bare fallow at depths of 0-30 cm and rotary tillage maintained higher microbial SIR than no-tillage or plowing at depths of 7.5-15 cm. There was no meaningful interaction effect between cover cropping and tillage on microbial SIR. At the Hokkaido field, cover cropping and tillage had only limited effects on microbial SIR. High F/B ratios (indicating fungal dominance) were recorded with the use of cover crops in both fields. Fungal SIR, estimated from the microbial SIR and F/B ratio, was closely related to the content of total soil organic carbon (SOC) and the mean weight diameter (MWD) of water-stable aggregates. Based on SOC, fungal SIR was significantly higher under rye cover cropping. The relationship between fungal SIR and MWD was affected by tillage. We conclude that rye cover cropping and rotary tillage were very effective in increasing fungal SIR, SOC, and MWD in the Ibaraki soil. Field practices that enhance fungal activities might be effective in improving certain types of arable soil.
- 一般社団法人日本土壌肥料学会の論文
- 2012-02-00
著者
-
Araki Hajime
Field Science Center For Northern Biosphere Hokkaido University
-
Nakamoto Tomomi
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
-
KOMATSUZAKI Masakazu
Field Science Center, Ibaraki University College of Agriculture
-
HIRATA Toshiyuki
Field Science Center for Northern Biosphere, Hokkaido University
関連論文
- Windthrow resistance of apple trees grafted in an orchard
- Spatial Variability Patterns of Wheat Growth and Soil Properties in a Small Field as Affected by Tillage Intensity
- The Spatial Variability Patterns of Maize Growth and Root Colonization by Arbuscular Mycorrhizal Fungi in a Small Field
- Response of Soybean, Sugar Beet and Spring Wheat to the Combination of Reduced Tillage and Fertilization Practices(Agronomy)
- Response of weed flora to combinations of reduced tillage, biocide application and fertilization practices in a 3-year crop rotation
- The Effects of Cropping Systems and Fallow Managements on Microarthropod Populations
- Effects of Tillage on Along-Row Variability of Wheat and Maize Biomass
- Development of Substrate Induced Respiration (SIR) Method Combined with Selective Inhibition for Estimating Fungal and Bacterial Biomass in Humic Andosols(Agronomy)
- Extent and Implications of Weed Spatial Variability in Arable Crop Fields
- A Comparison of Intensive Rice Production in Japan and Wheat Production in Europe : The Contribution of Minimum Tillage to Sustainability
- Root-Determined Hypernodulation Mutant of Lotus japonicus Shows High-Yielding Characteristics
- Influence of Soybean and Maize Roots on the Seasonal Change in Soil Aggregate Size and Stability
- The Distribution of Wheat and Maize Roots as Influenced by Biopores in a Subsoil of the Kanto Loam Type
- The Configuration of the Seminal Roots of Triticum aestivum L. (Poaceae)
- Aggregate Size and Stability of Andosol as Affected by Soybean Root Growth under Controlled Conditions
- 450 Pollen morphology of Bomarea (Alstroemeriaceae) and its systematic significance
- Effects of tillage and winter cover cropping on microbial substrate-induced respiration and soil aggregation in two Japanese fields(Soil Fertility)