Evaluation Of Soil Nutrients Based On Factor Analysis

Soil is the basis of crop growth,and the reasonable evaluation and utilization of soil nutrients have an important impact on the sustainable development of agriculture,agriculture,agriculture,agriculture and rural undertakings.Soil nutrient evaluation and the study on the spatial and temporal variation characteristics are the foreshadows for providing scientific theoretical guidance for Precise Fertilization in precision agriculture,so as to promote the rational application of fertilizer and effective management of soil nutrients in actual production In life,the characteristics of soil nutrient change and effective and reasonable evaluation and analysis can be targeted to propose suggestions for soil planting and fertilization.In the past research,the single factor analysis or single index are used to analyze,and the comprehensive evaluation of soil nutrients is compared to the comprehensive analysis of soil nutrients,so that the soil nutrients of the plot are evaluated first and then the single analysis is made One,there are few researches on the abundance and shortage of soil nutrient index,so that the research can evaluate the soil nutrient content more comprehensively and systematically,so as to make the evaluation more objective and targeted.This paper takes the soil nutrients of Nongan County of Jilin Province as the research object,and studies the spatial and temporal variation law of soil nutrients by geostatistics,factor analysis and cluster analysis,and evaluates the soil nutrient status comprehensively.Spatial and temporal variation of Soil Nutrients Based on Geostatistics.The results show that structural factors and random factors have a certain influence on the spatial variation degree of alkali nitrogen,available phosphorus and available potassium,and the coefficient of variation is less than 50%,indicating that the soil nutrient content is relatively stable,and the results show that the spatial variation degree of these variables is relatively stable,and the results show that the spatial variation degree of the variables is relatively stable,and the results show that the spatial variation degree of the variables is affected by structural factors and random factors,and the variation coefficient is less than 50% There are many structural factors and the random factors have a small impact.At the same time,it is found that the variation coefficient of effective phosphorus in 2015,2016 and 2018 is higher than that of other soil nutrients,indicating that the cultivation mode and the amount of fertilizer have a greater impact on the variation of effective phosphorus.Comprehensive evaluation of Soil Nutrients Based on factor analysis and K-means mean clustering.According to the second National Soil Census classification standard,the single soil nutrient was evaluated first,then the comprehensive score of soil nutrients was calculated by factor analysis.The soil nutrients were classified into I(0.39 < IFI < 1.35),class II(0.04 < IFI <0.39),class III General(-0.3 < IFI < 0.04),and class IV deficiency(-1.21 < IFI)<-0.3)4categories,the comprehensive score of soil nutrients and the soil area of each category from2013 to 2018 are comprehensively compared and analyzed.It is found that the comprehensive evaluation of soil nutrients in 2013-2018 is generally about 80%,and the comprehensive status of soil nutrients is relatively stable,so it is necessary to control the single element fertilization scientifically and reasonably.Interpolation analysis of the comprehensive evaluation scores of soil nutrients in 2013-2018 shows that the overall distribution of soil nutrient comprehensive fertility in different periods is generally characterized by High East,West and low in South and low in North.From 2013 to 2016,the distribution of land parcels of comprehensive nutrients of various levels of soil was distributed in scattered sheet.The spatial distribution of comprehensive nutrients at all levels became centralized in 2017 and 2018,indicating that the influence of soil nutrient comprehensive index was weakened by natural factors such as landform,soil and hydrology,and more uniform distribution was observed due to the influence of artificial fertilization,planting and management.Development and design of soil nutrient inquiry system.Through the development of soil nutrient inquiry system,the soil nutrient database is established first,and the informatization of soil nutrients is realized according to the above methods,which provides the basis for scientific fertilization and management.Based on the principle of nutrient balance and soil nutrient determination,the soil nutrient inquiry system is developed and designed.The platform for storing,inquiring,evaluating and exchanging soil nutrients is built for farmers and agricultural experts,which provides decision support for scientific and accurate fertilization.