Regionalized Soil Nutrient Administration And Its Application On High Quality Wheat Production And Fertilization

In order to realize regionalized soil nutrient administration and highquality production, spatial distribution and variability rule are obtained basedon the platform of GIS(Geographic Information System) ,geostatistics methodand DPS data processing system, and regionalized soil nutrient administrationis realized by hierarchical cluster analysis. Two fields of the five types arechosen ,one is the high fertile field ,and the other is premium fertile one,reasonable adding amount of bio-organic manure and fertilizer is decided byaccurate field experiment. This research can bring forward the gist for soilnutrition subarea and high quality wheat production. The research results areas follows: 1. The soil variability, spatial variability structure and macro spatialdistribution are obtained in the researched area. The indexes of Available N, P,K and organic matter obey the normal distribution. And the spatial variabilityof soil nutrient has semivariogram structure, and the spatial variability of eachsoil index differs. The coefficients of Available N, P, K vary from 15.02% to52.55%, which belong to premium variability. The sequence sorted byvariability intensity is Available P > Available K > Available N > organicmatter. The variability distances of the four soil nutrient indexes differ, whichvary from 268.26m to 485.19m. It is obvious that the dimension of 200m×170m can satisfy the demand. The distribution maps of four soil nutrient andthe proportion of each grading are obtained based on Kriging analysis, whichbrings the gist for great dimension soil nutrient administration. 2. Regionalized administration of soil nutrient based on MapGIS andDPS The soil nutrient of the researched region is divided into five types by themean of cluster analysis, and the outcome of cluster analysis is compared withtraditional grading, which explains the superiority of cluster analysis.Regionalized soil administration is realized by GIS and precise experiment. 4山东农业大学硕士学位论文The five types are different in each index, which shows that the classificationhas no the difference of excellence and coarseness, and is different from thegrading of traditional formulate fertilization. The information of soil nutrientclassification is reflected onto the map by GIS, which realizes the query of soilnutrient, classification, adscription etc. This can realize two-way query: firstfrom the graphics to the attribute, secondly from the attribute to the graphics.All the above can fully exert the function of GIS. All the soil nutrient cells canbe fertilized according to recommendatory fertilization way. 3. The effect on wheat yield for the using of biological organic fertilizerand fertilizer The affecting factors of the yield on high and premium fertile fields arebrought forward on high and premium fertile fields. On high fertile fields the wheat yield has no significant variation if thebasal fertilization is reduced by 30 percent. The 10th treatment that is completebiological organic fertilizer treatment is only higher on yield than the lowestyield that is 575 Kg/667m2, and doesn't reach a higher yield. On high fertilefields the factors on wheat yield are basal biological organic fertilizer,supplemental biological organic fertilizer and liquid biological fertilizer , andthey are negative, positive and positive related with wheat yield respectively. On premium fertile fields the factors that affecting wheat yield are basalbiological organic fertilizer and supplemental biological fertilizer, and thestep-by-step regression coefficients are 0.0045 and 0.0470. Judged from thestep-by-step regression coefficients the supplemental biological organicfertilizer is more significant on improving the wheat yield than basalbiological organic fertilizer. 4. The effect on wheat quality for the using of biological organic fertilizerand fertilizer The wheat quality indexes are obt...