Evaluation Of Soil Quality In Arong Banner Dry Farming Area Under Different Tillage Methods

In order to vigorously implement conservation tillage and straw resource reuse,this paper set up 30 sampling points in Arong Banner dry farming area combined with rotation of straw height difference to return to the field WH,straw crushing cover to return to the field SM and straw crushing cover to return to the field+organic fertilizer SM+For OM treatment,16 approximate sampling points are set up for traditional farming combined with CT-WH,CT-SM,and CT-SM+OM treatment,and the effects of various measures on soil fertility are analyzed.Analyze the basic characteristics of 12 soil indicators to understand the quality of the indicators in the study area,establish the Minimum Data Set(MDS)of the dry farming area through principal component analysis,and calculate with the fuzzy membership function and weighted sum model Integrated Fertility Index(IFI)of MDS,and the soil fertility is graded.1.The soil pH in the study area is generally acidic and the soil bulk density is moderate.Both are mainly affected by structural factors.Due to the parent material of the soil,the content of organic matter and total nitrogen in the whole area has decreased to varying degrees,showing moderate It is very poor,available potassium and other soil trace elements are abundant,and available phosphorus is affected by random factors.2.Combined with principal component analysis and Norm entering the MDS,there are soil bulk density,pH,organic matter,total nitrogen,available potassium and available manganese;soil bulk density,pH value and available potassium are closer to the appropriate value under SM treatment;under SM+OM Organic matter content is the highest(48.69 ± 5.32g/kg),the organic matter content of the traditional farming and straw mulching and returning to the field has significantly increased;the total nitrogen increase under CT-WH is 12.38%,which is more conducive to the accumulation of nitrogen;The WH measure has a more significant effect on increasing the effective phosphorus content.The increase of IFI under SM is 39.092%,and the decrease of IFI under CT-WH is 0.33%,while the performance of IFI under CT-SM+OM has not changed significantly in different years,and the change ranks as SM?CT-SM?SM+OM?WH?CT-SM+OM?CT-WH.3.Based on cluster analysis of IFI,three grades of excellent ?(0.77?0.938),medium?(0.619?0.715),and poor ?(0.403?0.507)are classified in the study area,and the excellent areas are classified into high-quality cultivated land protection areas.The medium area is to strictly prevent soil degradation,and the poor areas(Fuxing Town,Liuhe Town,Xiangyangyu Town,Yadong Town,Horqi Town and some parts of Xinfa Township)should focus on implementing local conditions,conservative farming or returning farmland to forest.