Effects of wheat stubble on runoff, infiltration, and erosion of farmland in the Loess Plateau, China subjected to simulated rainfall
Linhua Wang1, Bo Ma1, and Faqi Wu1,21Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, PR China 2College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China
Received: 28 Nov 2016 – Accepted for review: 05 Dec 2016 – Discussion started: 07 Dec 2016
Abstract. Soil and water losses in agriculture are major environmental problems worldwide, especially on the Loess Plateau, China. Summer fallow management may help to control soil erosion and conserve water. This study investigated the effects of wheat stubble on runoff, infiltration, and soil loss in laboratory plots under simulated rainfall. The treatments comprised wheat stubble cover (WS) and traditional plowing (TP) in runoff plots (4.0 m × 1.0 m) with three slope gradients (5°, 10°, and 15°) under simulated rainfall at 80 mm h−1 for 1 h. The runoff volume from WS plots was significantly less than that from TP. The runoff reduction with WS ranged from 91.92–92.83 % compared with TP. The runoff rates varied with the runoff volume in the same manner. Under WS, sediment losses (2.41–3.78 g m−2) were reduced dramatically compared with TP (304.31–731.23 g m−2). The sediment concentration was also significantly lower with WS than TP. The infiltration amount was higher with WS (94.8–96.2 % of rainwater infiltrated) than TP (35.4–57.1 %). Thus, stubble cover can help to control erosion and conserve soil and water resources.
Wang, L., Ma, B., and Wu, F.: Effects of wheat stubble on runoff, infiltration, and erosion of farmland in the Loess Plateau, China subjected to simulated rainfall, Solid Earth Discuss., doi:10.5194/se-2016-163, in review, 2016.