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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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Rainfall-runoff process of different treatments for two rainfall events of 2012.
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pone.0152313.g007: Rainfall-runoff process of different treatments for two rainfall events of 2012.

Mentions: There were only two whole rainfall events recorded in 2012. The first one occurred on August 2nd, the amount and intensity were 16.9 mm and 25 mm/h respectively. As seen in Fig 7, the total runoff (1.6 mm) of the control was much more than that of the micro-basin treatments, which were 0.55 mm (65-cm block space), 0.53 mm (75-cm block space) and 0.72 mm (75-cm block space). Meanwhile, the initial runoff generation time of the micro-basin plots was relatively later than that of the control, that is a significant portion of runoff was captured in the micro-basin. Runoff increased gradually and slowly in the micro-basin tillage treatment plots during the rainfall event, especially in the 75-cm block space. The second rainfall occurred on August 19th and precipitation and rainfall intensity were 43.1 mm and 10 mm/h. Runoff of the control was still the largest with 2.67 mm for the whole rainfall event. Although the average runoff reduction rate of the three micro-basin treatments was higher than 78%, the differences among them were small. In addition, compared to monitoring data of August 2nd, the micro-basin tillage had more influence on holding off water and, thus, increasing the initial runoff generation time.


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)

Rainfall-runoff process of different treatments for two rainfall events of 2012.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0152313.g007: Rainfall-runoff process of different treatments for two rainfall events of 2012.
Mentions: There were only two whole rainfall events recorded in 2012. The first one occurred on August 2nd, the amount and intensity were 16.9 mm and 25 mm/h respectively. As seen in Fig 7, the total runoff (1.6 mm) of the control was much more than that of the micro-basin treatments, which were 0.55 mm (65-cm block space), 0.53 mm (75-cm block space) and 0.72 mm (75-cm block space). Meanwhile, the initial runoff generation time of the micro-basin plots was relatively later than that of the control, that is a significant portion of runoff was captured in the micro-basin. Runoff increased gradually and slowly in the micro-basin tillage treatment plots during the rainfall event, especially in the 75-cm block space. The second rainfall occurred on August 19th and precipitation and rainfall intensity were 43.1 mm and 10 mm/h. Runoff of the control was still the largest with 2.67 mm for the whole rainfall event. Although the average runoff reduction rate of the three micro-basin treatments was higher than 78%, the differences among them were small. In addition, compared to monitoring data of August 2nd, the micro-basin tillage had more influence on holding off water and, thus, increasing the initial runoff generation time.

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