Spatial And Temporal Variation Rules Of Farmland Soil PH Value And Organic Matter Of Shimen County

As the most important soil properties. Distribution and change of pH value and organic matter can provide important references for farmland quality management and reasonable fertilization. Comparing the data of the second soil survey with soil-testing fertilization by statistical and spatial analysis. The study of the region of Spatial and temporal variation rules of farmland Soil pH Value and organic matter. The results showed that:1. In the two period. The average pH value of cultivated land decreased by 0.49. 42.51% decrease in pH value of cultivated land. The soil of cultivated land is mainly acidic and neutral. Overall showed a tendency to expand the area of acid soil.2. Different soil types are different in different types of acid and alkali. Because the effects of soil pH from soil parent materials. The buffering capacity of alluvial soil and purple soil is better than that of paddy soil and the others. The change degree of red soil is the biggest. Acid and weak acid area increased by 11.33% and 3.72%.3. The changes of soil pH in different cultivated land types are not the same. pH of dry land soil is less than that of paddy soil. Two types of cultivated land soil pH all decreased. The decline rate of dry land is higher than that of paddy field.4. The content of soil organic matter was higher in cultivated land. Content between 9.00 g/kg-90.68g/kg. The average content is 28.54g/kg.5. The size of organic matter content in different soil types was:Yellow soil> lime soil>paddy soil>red soil>fluvo aquic soil>purple soil. Organic matter content of different types of cultivated land was The paddy field is larger than the dry.6. In the two period. The average content of soil organic matter increased from 26.31g/kg to 28.54g/kg. Due to fertilizer input and straw return to the field, etc. The organic matter content of cultivated land has been improved.