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

机译：东北黑土区微流域耕作的水土保持实践评价

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摘要

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.
机译：微流域耕作是一种水土保持措施，需要沿着犁沟建造各个地块。在这项研究中，进行了田间试验，以评估2012年至2013年（5°和7°）坡地耕地微流域耕作的效率。使用概念上最佳的块间隔模型设计微流域，以捕获每单位面积的最大水量。结果表明，与上下坡耕作相比，微盆耕作可使土壤水分和玉米产量分别增加约45％和17％，并减少径流，沉积物和养分负荷约63％，96％和86 ％， 分别。同时，微流域耕作可降低高峰径流率，延缓初始径流产生时间。此外，在不同间隔的所有处理中，具有最佳阻塞间隔的微盆地耕作被证明是最佳的。与其他分区间隔的处理相比，最佳分区间隔处理使土壤水分增加了约10％，径流率降低了约15％。通常，具有最佳阻塞间隔的微流域耕作代表了黑土区坡耕地的有效水土保持实践。

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