Suitability Assessment Of The Establishment Of Artificial Grassland In Hong Yuan County

This test was conducted in Hongyuan County of Northwest Sichuan pastoral area.Collected and analysis 17 kinds of samplings and analyses which affect the suitability of pasture establishment,in addition,drew the spatial distribution maps.At the same time,used the factor analysis method to conclude 4 main factors as the evaluation of the suitability of pasture establishment,and calculated the weight coefficient of each variable factors and the main factors.Through the analysis of the membership degree of each variable factor,divided into two kinds of functions,i.e.linear function and a nonlinear function,calculated the membership function model and the concept of evaluation standards.Based on SOA(Service-Oriented Architecture)platform,established the assessment system of suitability of pasture establishment in Hongyuan County,each influence factors data was storage and managed,mean while,probed into the possibility of the assessment system.1.The suitability evaluation system of pasture establishment in Hongyuan CountyIn this study,refer to the existing grass industry system and evaluation system of farmland,combined with the practical situation of the study area,in particular the regional climate condition,the influence for the local and similar areas of artificial grass planting suitability of the major indexes comprehensive selection,established a set of suitable for the region and ecological function region of artificial grass planting suitability evaluation index system.2.The weight coefficients of the suitability evaluation system of pasture establishment in Hongyuan CountyThis study used factor analysis method,in the angle of the objective to analysis the participated variable factors of evaluation,extracted their weight coefficient values.And in accordance with the factor analysis results,the whole variable factors were summarized as four kinds of main factors,which named:site conditions(F1),soil conditions(F2),climate conditions(F3),and site conditions(F4),respectively,this was consistent with the evaluation of cultivated land productivity.From the point of weight coefficients of each main factors,soil conditions(0.282)>site conditions(0.259)>land conditions(0.239)>climate conditions(0.220),showed that soil conditions,site conditions,climate conditions and land condition had importance effects for the assessment system of suitability of pasture establishment in Hongyuan County.3.The optimal sampling density of the indexes of the suitability evaluation system of pasture establishment in Hongyuan CountyAfter the establishment of the assessment system,soil depth,soil organic matter,soil total nitrogen,soil total potassium,soil total phosphorus and soil pH needed to collect in field.In addition,the character of spatial structure were isotropy,more less,simulated the semi-variogram of indexes function models,calculated the factors of nugget range ratio were 64.27%,5.67%,33.93%,37.10%,31.17%and 29.43%,respectively,showed a relativity stronger spatial correlation.In addition,calculated the optimal sampling density of above six indicators in Hongyuan County,they were 3.23 Km2,3.44 Km2,4.51 Km2,3.81 Km2,3.75 Km2 and 3.92 Km2,respectively.Using the Ordinary Kriging interpolation method mapped out the spatial distribution of the above indicators.It can be seen that the spatial distribution of soil depth,soil organic matter,soil total nitrogen,soil total phosphorus,soil total potassium and soil pH value,these indicators showed the high value distribute in north,were above 50 cm,190 g/kg,3.78 g/kg,1.15 g/kg,20.43 g/kg and 6.29,respectively.Through the analysis on spatial structure and spatial distribution of indexes,provided a data base for the establishment of pasture in Hongyuan County and even provided relevantly scientific judgment.4.The system of evaluation of the suitability of pasture establishment in Hongyuan CountyCombined with factor analysis results of the weight coefficient values of each variable factor and linear and nonlinear functions models calculated by membership function,used the method of comprehensive evaluation.Using.NET system framework,and based on the SOA platform,in the form of assembling structures,system function module,retaliating for the evaluation of the suitability of pasture establishment in Hongyuan County for government and the local pastoralist.