تاثیرپذیری رواناب و رسوب تولیدی از سطوح مختلف پوشش کاه و کلش کلزا در کرت‌های کوچک آزمایشگاهی

Imbalance soil erosion is one of the dangers that threatens the availability of natural resources to communities by the high amount of runoff and sediment production. To control the effect of soil erosion, the application of the governing principles on the use of organic and inorganic soil stabilizers can be considered as an effective manner. The purpose of this study was to investigate the effect of different amounts of Colza straw on runoff and sediment of loamy-sandy soils in the laboratory conditions. For this purpose, rainfall of 50 mm h^-1 with duration of 10 min on plots with scale of 0.5 m² in the three replications, with coverage values of 25 and 50% protection of Colza straw from industrial fields of Dasht-e- Naz Sari City is harvested and was simulated using rainfall simulator of Faculty of Natural Resources, University of Agricultural Sciences and Natural Resources of Sari. The coverage values of 25 and 50 % of Colza straw provided from industrial fields of Dasht-e- Naz, Sari city was used for the present study. The results showed that the application of both levels of Colza straw had a significant effect (p <0.05) on runoff and sediment reduction. Runoff and sediment had decreased in coverage level of 25 % equal to 9.2 and 42.5, respectively and for cover 50 % equal to 46.1 and 71.3, respectively. With straw increasing, the amount of runoff and sediment more decreased. The straw coverage level of 50 % decreased the runoff volume and sediment equal to five and two times, respectively, in compared to the 25 % straw coverage level. The results of this study emphasize on the importance of using environmental friendly soil organic stabilizer as an appropriate biological method to replace the cost-effective and inefficient activities of soil and water conservation.