Research And Application Of Soil Improvement Technology In The Upper Mountain Section Of Taizi River

With the rapid development of industry and economy,the ensuing environmental problems have become more and more serious.Unlike air and water environmental pollution,soil pollution is difficult to detect in a short period of time,and it is too late when problems emerge.At present,in terms of agricultural land,soil pollution is mostly due to people's unreasonable use of the land and the large-scale application of chemical fertilizers,resulting in serious soil pollution problems.As the most promising soil improvement technology at present,soil amendments can stabilize soil structure while maintaining soil moisture,improve soil physical and chemical properties,increase soil nutrients,promote crop growth,and increase crop yields.This study is based on the results of soil surveys in the upper mountain section of the Taizi River,combined with the fact that there are serious human disturbances in the upstream area,the stability of the ecosystem is reduced,and the stability of the habitat is poor,as well as the serious damage to the soil structure and functional degradation in the catchment area of the upper mountain section of the Taizi River.The problem is to improve the physical and chemical properties of the local soil and increase the nutrient content of the soil as the goal.Research and develop soil improvement technologies in order to improve the local soil properties,increase crop yields,and restore the ecological community structure.The main research is as follows:(1)This research aims at the problems of more forest land and less cultivated land in the upper reaches of the Taizi River,and poor soil.Combining statistics and software analysis to carry out land investigation and simulation,it is found that there is a correlation between the existing problems and the physical and chemical properties.The survey results showed that the content of total nitrogen and total phosphorus in the cultivated soil in the upper mountain section of the Taizi River exceeded the standard,and the supply capacity of available nutrients was poor,resulting in the destruction of the ability of plants to retain water and soil.At the same time,the soil was generally weakly alkaline;the bulk density of the wasteland soil If the deformation coefficient is too large,the main problems of soil compaction and sand petrification are mainly weeds,which are not suitable for plant growth and easily cause soil erosion.(2)Based on the problems of soil compaction and lack of nutrients in the upper mountain section of the Taizi River,the local common green plant stalks and pine needles such as sheep dung,corn,blue flower platycodon were used to prepare soil amendments,and the soil physical and chemical properties of each amendment were investigated.The effect of nutrient content and crop growth.The results show that several single soil amendments prepared in this experiment can improve the physical and chemical properties of the soil and soil nutrients to a certain extent,and at the same time can promote the growth of plant roots.Among them,sheep dung has the best adjustment effect on soil water holding capacity and nutrient composition;green planted straw has the best effect on water content adjustment,and pine has the best effect on p H adjustment.(3)In order to improve the effect of soil improvement,compound soil amendments were prepared by mixing sheep dung,green plant stalks and pine needles in a certain proportion,and the effects of each compound amendment on soil physical and chemical properties,nutrient content and crop growth were investigated.The results show that the compound soil good agent at various ratios can improve the physical and chemical properties and nutrient content of the soil,and promote plant growth.Among them,the treatment effect of T5(20 g sheep manure+4 g green plant straw+1 g pine needles+2 m L of EM microbial agent)is better than other groups,which can effectively improve soil water holding capacity,p H and soil nutrients in a short period of time.Good to promote crop growth.(4)On the basis of experimental research,in order to further verify the practical application effect of the compound modifier,a pilot test was set up in Benxi to investigate T5(20 g sheep dung+4 g green plant straw+1 g pine needles+EM bacteria 2 m L)The effect of compound amendment on soil physical and chemical properties,nutrient content and crop growth.The results show that the application of the modifier under the above ratio at a dosage of 220 kg/100 m~2can effectively improve the physical and chemical properties of the soil and promote plant growth.It can be applied to engineering and applied in engineering design.Through the analysis of economic benefits,it can be seen that in the long term,herbaceous plants are better than corn,and can reduce the application of chemical fertilizers and pesticides,and effectively improve soil properties.Local residents can be recommended to switch to plants.