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Assessment of Micro-Basin Tillage as a Soil and Water Conservation Practice in the Black Soil Region of Northeast China.

Sui Y, Ou Y, Yan B, Xu X, Rousseau AN, Zhang Y - PLoS ONE (2016)

Bottom Line: Results indicated that when compared to the up-down slope tillage, micro-basin tillage could increase soil water content and maize yield by about 45% and 17%, and reduce runoff, sediment and nutrients loads by about 63%, 96% and 86%, respectively.Compared with treatments of other block intervals, the optimal block interval treatments increased soil moisture by around 10% and reduced runoff rate by around 15%.In general, micro-basin tillage with optimal block interval represents an effective soil and water conservation practice for sloping farmland of the black soil region.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.

ABSTRACT
Micro-basin tillage is a soil and water conservation practice that requires building individual earth blocks along furrows. In this study, plot experiments were conducted to assess the efficiency of micro-basin tillage on sloping croplands between 2012 and 2013 (5°and 7°). The conceptual, optimal, block interval model was used to design micro-basins which are meant to capture the maximum amount of water per unit area. Results indicated that when compared to the up-down slope tillage, micro-basin tillage could increase soil water content and maize yield by about 45% and 17%, and reduce runoff, sediment and nutrients loads by about 63%, 96% and 86%, respectively. Meanwhile, micro-basin tillage could reduce the peak runoff rates and delay the initial runoff-yielding time. In addition, micro-basin tillage with the optimal block interval proved to be the best one among all treatments with different intervals. Compared with treatments of other block intervals, the optimal block interval treatments increased soil moisture by around 10% and reduced runoff rate by around 15%. In general, micro-basin tillage with optimal block interval represents an effective soil and water conservation practice for sloping farmland of the black soil region.

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The sketch map of the micro-basin tillage.
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pone.0152313.g003: The sketch map of the micro-basin tillage.

Mentions: The experimental work was conducted in 2012–2013. It was based on two independent variables that included the block space (block interval length) and slope gradient. In the black soil regions of Northeast China, 80% of agricultural land has a slope gradient smaller than 7°, twelve plots (4 treatments ×3 replications) were established on 5° sloping land in 2012 and twelve plots were installed on 7° sloping land in 2013. According to Eq (3), treatments of control and micro-basins with block space of 65 cm, 75 cm (optimal block interval for a 5°-slope) and 85 cm were built in 2012. Treatments of control and micro-basins with block space of 53 cm, 63 cm (optimal block interval for a 7°-slope) and 73 cm were installed in 2013. Each plot, 25-m long and 1.8-m wide, had three ridges. Maize (Zea mays), a major food crop in the study area, was planted using traditional cultural practices on May 1st of each year. A sketch map of the experimental plots is shown in Fig 3. In order to moderate the impact of micro-basins on operation of farm machinery, the basins were built after the maize elongation stage (more or less June 12).


Assessment of Micro-Basin Tillage as a Soil and Water Conservation Practice in the Black Soil Region of Northeast China.

Sui Y, Ou Y, Yan B, Xu X, Rousseau AN, Zhang Y - PLoS ONE (2016)

The sketch map of the micro-basin tillage.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4816346&req=5

pone.0152313.g003: The sketch map of the micro-basin tillage.
Mentions: The experimental work was conducted in 2012–2013. It was based on two independent variables that included the block space (block interval length) and slope gradient. In the black soil regions of Northeast China, 80% of agricultural land has a slope gradient smaller than 7°, twelve plots (4 treatments ×3 replications) were established on 5° sloping land in 2012 and twelve plots were installed on 7° sloping land in 2013. According to Eq (3), treatments of control and micro-basins with block space of 65 cm, 75 cm (optimal block interval for a 5°-slope) and 85 cm were built in 2012. Treatments of control and micro-basins with block space of 53 cm, 63 cm (optimal block interval for a 7°-slope) and 73 cm were installed in 2013. Each plot, 25-m long and 1.8-m wide, had three ridges. Maize (Zea mays), a major food crop in the study area, was planted using traditional cultural practices on May 1st of each year. A sketch map of the experimental plots is shown in Fig 3. In order to moderate the impact of micro-basins on operation of farm machinery, the basins were built after the maize elongation stage (more or less June 12).

Bottom Line: Results indicated that when compared to the up-down slope tillage, micro-basin tillage could increase soil water content and maize yield by about 45% and 17%, and reduce runoff, sediment and nutrients loads by about 63%, 96% and 86%, respectively.Compared with treatments of other block intervals, the optimal block interval treatments increased soil moisture by around 10% and reduced runoff rate by around 15%.In general, micro-basin tillage with optimal block interval represents an effective soil and water conservation practice for sloping farmland of the black soil region.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.

ABSTRACT
Micro-basin tillage is a soil and water conservation practice that requires building individual earth blocks along furrows. In this study, plot experiments were conducted to assess the efficiency of micro-basin tillage on sloping croplands between 2012 and 2013 (5°and 7°). The conceptual, optimal, block interval model was used to design micro-basins which are meant to capture the maximum amount of water per unit area. Results indicated that when compared to the up-down slope tillage, micro-basin tillage could increase soil water content and maize yield by about 45% and 17%, and reduce runoff, sediment and nutrients loads by about 63%, 96% and 86%, respectively. Meanwhile, micro-basin tillage could reduce the peak runoff rates and delay the initial runoff-yielding time. In addition, micro-basin tillage with the optimal block interval proved to be the best one among all treatments with different intervals. Compared with treatments of other block intervals, the optimal block interval treatments increased soil moisture by around 10% and reduced runoff rate by around 15%. In general, micro-basin tillage with optimal block interval represents an effective soil and water conservation practice for sloping farmland of the black soil region.

Show MeSH