| In order to understand the agriculture climate and soil resource utilization status of millet planting in Heilongjiang Province,new technologies and new methods such as geograp Hic remote sensing systems were used to carry out zoning research on the optimal layout of millet planting in Heilongjiang Province,and the layout of millet planting was adapted to local conditions.Using the climate observation data of 110 meteorological stations in Heilongjiang Province for 60 years the basic geograp Hic information data of the corresponding stations,soil data provided by the Institute of Soil,Fertilizer and Environmental Resources,Heilongjiang Academy of Agricultural Sciences,Based on the soil fertility measurement data and the basic geograp Hic information data of each index of the corresponding point,using the functions of spatial geograp Hic statistical analysis and GIS software mapping,the climate index,soil index and topograp Hic index are drawn and integrated,and each index element is spatially distributed and related.Sexuality for visualization research.The stepwise regression analysis method was used to establish a DEM-based agriculture climate resource and soil element set in Heilongjiang Province.The zoning index elements and residuals of millet planting were calculated by small grids and residual errors were corrected,and the spatial interpolation and cross-validation of rainfall,soil fertility and other indicators were carried out,and the climatic index,soil index and topograp Hic index were obtained respectively.Small grid layer,elevation data Using 90 m×90 m SRTM DEM data to extract the longitude,latitude,elevation,aspect and slope of each grid point,using the basic information data provided by each site to use the entropy weight method to determine the millet in Heilongjiang Province The weight of the evaluation index of planting suitability,and then according to the determined grade indicators of various climates,soils and topograp Hy of millet,use the index sum method to determine the comprehensive index of the suitability grades of climate,soil and terrain,and use the corresponding serial number and comprehensive index of the evaluation unit.Exponential ranking plots the distribution of composite indices,and determines the number of ranks and critical points for dividing composite indices according to curve slope inflection points.The basic geograp Hic data of 110 meteorological stations in Heilongjiang Province and the climatic data of the corresponding sites used in this study are all reasonably distributed,with a coverage rate of more than 98%.The characteristics of the ecological environment elements of millet in Heilongjiang Province were analyzed in detail.The active accumulated temperature of the field >10℃in the ecological planting area of millet in Heilongjiang Province was2100 ℃-3200 ℃,the average temperature from June to august was 12 ℃-21 ℃,and the rainfall in the field from July to August It is between 200 mm and 300 mm,and most areas are about 100 m above sea level.These characteristics are basically in line with the conditions for the growth of high-quality millet,and some are even better than other millet planting areas at home and abroad.The ecological suitability evaluation index system of millet in Heilongjiang Province has been established,and three first-level indicators have been established respectively: climate,soil,topograp Hy,The climate suitability evaluation weight is 0.6,the soil suitability evaluation weight is 0.3,and the terrain suitability evaluation weight is 0.1.Five secondary indicators under the climate indicator: average temperature in May-October,rainfall in July-August,average temperature in June-August,accumulated temperature greater than 10 ℃,sunshine hours in May-August;five indicators under soil indicator Secondary indicators: soil p H,organic matter content,available potassium content,available p Hosp Horus content,alkali hydrolyzed nitrogen content;two secondary indicators under the terrain indicators: altitude,slope.The application of GIS technology to realize the fine zoning of the ecological suitability of millet planting in Heilongjiang Province,and the layout of millet planting according to local conditions.The ecological suitability evaluation index system of millet in Heilongjiang Province was constructed,and the ecological suitability area division of millet planting in Heilongjiang Province was completed.Fine zoning of the ecological suitability of millet planting in Heilongjiang Province.The terrain data has high accuracy.The administrative area map of Heilongjiang Province is divided into 200 million raster layers of 90 m×90 m,and the non-arable land raster layers such as forests,rivers,lakes,mountains,cities,etc.are removed,and all non-arable land raster layers are removed.The layer is inserted with a blank image.Finally,more than 80 million small grids of 90 m×90 m in dry fields and paddy fields were retained.The interpolated data is networked,and the zoning accuracy is significantly improved. |
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