Study On The Effect Of Stripping Topsoil Nutrient By Different Fertilization

Soil resource is very valuable,but the topsoil is a very important part of it.Soil nutrient is mainly stored in the soil surface.It is an important index to evaluate the soil fertility,and it is an important factor to characterize the soil quality.The topsoil is not only an important factor in the quality level of the cultivated land,but also an important basis for crop growth.The construction of human occupation of cultivated land is inevitable,but the current domestic construction land when topsoil has not been effectively protected.On the one hand is not strong on the surface soil protection consciousness,on the other hand is the surface soil protection technique is not perfect.Among them,topsoil stripping fertilizing is an effective measure to protect the soil.Therefore,this article has an analysis on the effects of different fertilization time and different fertilization treatments on soil nutrients by setting experimental plot in different landform of Anhui Province.The farmland topsoil are stored in the experimental area,which have determined and carry out 6 months to cultivate fertilizer including CK(natural fertilizer),S1(straw fertilizer),S2r(straw and bacterial manure fertilize),and S3(pig manure fertilizer).The results of the study are as follows:1 The effects of S1 treatment and S3 treatment on soil nutrient was better in hilly experimental plot,and the effect of S2 treatment was poor.S1 and S3 treatment in the content of soil organic matter,alkali hydrolyzable nitrogen content,total nitrogen content decreased less,Soil organic matter content were reduced by 2.750 g/kg,4.319g/kg,the soil alkaline hydrolysis nitrogen content were reduced by 28.224 mg/kg,30.912 mg/kg,the soil total nitrogen content were reduced the 0.045 g/kg,0.130 g/kg.In S3 treatment,soil available phosphorus increased by 16.441 mg/kg,and the effect of soil fertility was better.CK and S1 treatment of soil available potassium content is also increased,CK treatment increased by 13.5 mg/kg,increase the magnitude of the larger,S1 treatment increased the amplitude of smaller,S2 and S3 treatment of soil available potassium decreased significantly.In the S2 treatment,the soil nutrient has been reduced,and the effect is poor.2 The results of S3 treatment on soil organic matter,total nitrogen and available phosphorus were better in the experimental plot of mountainous region,the effect of S1 treatment on soil available potassium fertilization was better,and the effect of S2 treatment on soil alkaline hydrolysis nitrogen fertilization was better.S3 treatment of soil organic matter content,available phosphorus content were reduced at least,respectively,decreased by 1.434g/kg,1.586 mg/kg.S3 treatment increased the content of soil total nitrogen,increased 0.008 g/kg,soil total nitrogen content decreased in other treatments.In S2 treatment,the content of soil alkaline hydrolysis nitrogen was decreased by 10.752 mg/kg,and the effect of Fertilization on soil fertility was better.In S1 treatment,the soil available potassium increased by 24 mg/kg,and the growth range was the largest.3 Plain experimental plots of soil organic matter content,total nitrogen content,available phosphorus and available potassium content were overall is reduced,but content of soil organic matter,total nitrogen and soil alkaline hydrolysis nitrogen among the four fertilizer treatments reduced have little difference.S3 treatment is relatively less,and the effect of these three kinds of nutrients are improved well.The treatment of S3 in organic matter content decreased by 3.655 g/kg,soil total nitrogen content decreased 0.111 g/kg,soil alkaline hydrolysis nitrogen decreased by 30.912g/kg.Secondly,the effects of S1 treatment and CK treatment were better,and finally is S2 treatment.But the content of available phosphorus and available potassium in the soil of CK treatment effect is better,followed by S3 treatment,and finally S1 and S2 treatment.4 In general,the hilly area in the experimental soil nutrient content to higher than the mountain region and plain experimental plots.Adding culture of pig manure fertilizer had the best effect,followed by adding straw to cultivate fertilizer,add straw and bacterial manure fertilizer effect is relatively poor.We can take no fertilizing measures for the soil which were stored in short-term or had high nutrient content.