Evaluation On The Quality Of Cultivated Land In Gaolan County

In order to fully understand the present situation of cultivated land quality in Gaolan County,especially the present situation of soil nutrients,to rationally utilize and protect the limited cultivated land resources and to promote the sustainable utilization of cultivated land resources,it is necessary to evaluate the quality of cultivated land,which can evaluate the comprehensive productive capacity of cultivated land.It will play a positive role in promoting the rational allocation of cultivated land resources,optimizing the structure of agricultural production and improving the competitiveness of products.The quality of cultivated land in Gaolan County was evaluated by soil nutrients.The formula data of soil measurement were consulted in the evaluation of cultivated land quality in Gaolan County,and the soil test data of land reassessment sampling in Gaolan County were analyzed.It can effectively grasp the cultivated land quality in Gaolan County,improve the dynamic monitoring of cultivated land quality step by step,and study the evolution law of cultivated land soil fertility in different regions.By means of soil analysis and measurement,according to the dynamic change characteristics of soil fertility and the law of spatial and temporal distribution in different regions,the evaluation index system of cultivated land quality was constructed,and the farmland quality was classified by soil fertility gradation combined with agricultural land grading method.Thus the evaluation of cultivated land quality can be achieved and the improvement of cultivated land quality will be improved.Cultivated land quality construction is of great significance.The following conclusions can be obtained from this study:(1)According to the analysis of sampling data,the average PH value of Gaolan County is 8.66,the soil is alkaline,the content of organic matter is 12.73 g /kg,and the average content of alkali-hydrolyzed nitrogen is 56.23 mg / kg.The average content of available phosphorus was 12.48 mg / kg,the average content ofavailable potassium was 195.56 mg / kg,and the content of available potassium was medium high according to the classification standard.(2)In this reassessment,spring wheat is regarded as a designated crop in Gaolan County,and three indices,such as utilization index of cultivated land quality and economic index,are calculated.The result of revaluation evaluation shows that the natural quality of national cultivated land in Gaolan County is mainly at 11 and 12,and the utilization is mainly at 11 and 12,and the whole is at a medium level.The revaluation and evaluation of Gaolan County are mainly at 13 and 14,etc.At a moderate or lower level.(3)The temporalvariation of thesoil fertility parameterswasstudiedusing the geo-atatistics and GIS,the resuits showed the soil PH of Liling was generally the middle-class stability MI level.(4)The main limiting factors of cultivated land in fertility included soil organic matter,pH value,alkali-hydrolyzalenitrogen,available phosphorus,and available potassium.