Sawdust For Brown Soil Slope The Influence Of Organic Matter And Soil Nitrogen

In the absence of water and soil resources is a common phenomenon in our country, especially in arid and semiarid areas, the construction of ecological environment and agricultural sustainable development has an important influence. Plant growth and soil water and soil are closely related to the change law of soil erosion and the soil, is arid and semiarid region how to efficient use of limited resources, saving project, improve the economic benefit of theoretical basis. In this paper, the outdoor simulation arid and semiarid region slope treatment method, by measuring the alfalfa growth process in the slope slope soil nitrogen content of soil organic matter content, organic matter content of the research on the slope surface brown loam sawdust and brown loam slope changes in the nitrogen content, the main draw the following conclusion:(1) Under the same conditions, using the sawdust sawdust materials of soil organic matter content than application materials of soil organic matter content changes is small, that sawdust of organic matter in brown soil slope erosion has a role in mitigation.(2) In the middle of July to mid-august this month, the depth has obvious downward trend.With 20 to 30 cm, among them a downward trend is most obvious, are the biggest, and the control group gap is also the most obvious.In consideration of alfalfa growth rule and the influence of factors such as climate, soil organic matter content is this period of time a substantial decline period, but the sawdust group still can effectively slow down the organic matter in the soil erosion.(3) With category, control the size of soil organic matter content increased obviously than sawdust group is small, again sawdust of brown soil slope surface organic matter has a better effect.(4) Under the same conditions, using the soil nitrogen content of sawdust material than applying sawdust material changes in the soil nitrogen content is lesser, showed the sawdust to the loss of nitrogen in brown soil slope has a role in mitigation.(5) In the middle of July to mid-august this month, the depth has obvious downward trend.With 20 to 30 cm, among them a downward trend is most obvious, are the biggest, and the control group gap is also the most obvious.Considering the alfalfa growth rule and the influence of factors such as climate, soil organic matter content is this period of time a substantial decline period, sawdust group still can effectively slow down the loss of nitrogen in the soil.(6) With group, control group in the extent of soil nitrogen content increases significantly smaller than sawdust group, again sawdust of brown soil slope nitrogen has a better effect.(7) In the process of soil organic matter and soil nitrogen analysis, through the chart analysis, will find that to a certain extent, the image has a certain similarity, it shows that soil organic matter and soil nitrogen to a certain extent is closely linked with the content of the soil.(8)Statistical analysis shows that applying sawdust on runoff plots 0 to 10 cm depth of s oil organic matter and nitrogen are reducing effect significantly;Applying sawdust 10-20 cm s oil depth on the runoff plots effect of organic matter and nitrogen decreased significantly; App lying sawdust 20-30 cm soil depth on the runoff plots organic reducing effect is very significa nt,But on sawdust 20-30 cm soil depth about runoff plots nitrogen to reduce significant relief.(9)Sawdust can improve the soil nitrogen content and organic matter content; The same processing brown soil organic matter content highest 0-10 cm,10-20 cm,20-30 cm. Sawdust in different slope positions community soil nitrogen content showed:> slope positions, in the hill; Control plot of soil nitrogen content in the downhill, presents:downhill in the world>, in the slope. This suggests that the sawdust measures, to improve the whole slope nitrogen contentIn conclusion, in brown soil slope surface soil layer below a certain sawdust can reduce the slope surface brown loam soil organic matter and brown loam nitrogen loss, slope in the highway slope protection projects in the future can adopt the measures.In conclusion, in brown soil slope surface soil layer below a certain sawdust can reduce the slope surface brown loam soil organic matter and brown loam nitrogen loss, slope in the highway slope protection projects in the future can adopt the measures.