Current Status Of Cultivated Soil Fertility And Strategy For Improvement In Fugu County,Yulin City

Cultivated land resource security is one of the basic elements of food security,and its quantity and quality are closely related to food production.With the rapid development of industrialization and urbanization,the number of reserve cultivated land resources that can be developed is gradually reduced.The contradiction between the increase of population and the decrease of land is more prominent.Coupled with unreasonable farming methods and excessive input of fertilizer,agricultural production land is faced with a series of problems,such as soil erosion,soil pollution degradation,soil structure destruction and so on,Cultivated land quality protection has become the top priority of efficient use of agricultural land resources.It is not only the key to improve the stability of food production,but also one of the core to ensure food quality and safety.The increasing rigidity of food demand puts forward higher requirements for cultivated land quality protection.It is an important measure to master the soil fertility and formulate the fertilization scheme.It is of great significance to realize the protection of cultivated land resources and the sustainable development of agriculture by investigating the soil nutrient status and judging the soil fertility level,so as to achieve the organic combination of crop growth demand and soil available resources.This research focuses on the investigation of the soil fertility of cultivated land in Fugu County.By comparing the results of the survey data in Fugu County’s fertility evaluation in2013 with the results of this research,it explains the changes in the fertility of cultivated land in Fugu County over the past few years,and is based on actual production.Pointed out the existing problems of agricultural production in Fugu County,and gave corresponding solutions.The main results of the research are as follows:（1）Obtained 2020 Fugu County farmland soil organic matter and macro element content data through investigation:Fugu County farmland soil total nitrogen average value is 0.43g·kg^-1;farmland soil available phosphorus average value is 10.24 mg·kg^-1;farmland soil available The average potassium is 137.29 mg·kg^-1;the average potassium of cultivated soil is 796.98 mg·kg^-1.The average value of cultivated soil organic matter is 9.16 g·kg^-1;the average value of cultivated soil p H is 8.48.Obtain the data of trace element content of cultivated land in Fugu County in 2020 through investigation:the average available boron in cultivated land in Fugu county is 0.44 g·kg^-1;the average available iron in cultivated land is3.62 mg·kg^-1;the average available copper in cultivated land is The value is 0.39 mg·kg^-1;the average value of arable soil available zinc is 0.45 mg·kg^-1;the average value of arable soil available manganese is 2.14 mg·kg^-1.（2）In 2020,the fertility of cultivated land in Fugu County has been comprehensively improved.Through direct comparison,it is found that the contents of soil organic matter,available phosphorus and available potassium have been significantly improved.Compared with 2013,the cultivated area with organic matter content of 10-15 g·kg^-1 has increased from25.33%of the total cultivated area to 30.48%of the total cultivated area,When the content of soil organic matter was less than 6 g·kg^-1,the area of cultivated land decreased by 95.83%,the content of soil available phosphorus increased to more than 5 mg·kg^-1,and the content of available potassium increased to more than 100 mg·kg^-1.（3）The study identified the main problems currently existing in agricultural production in Fugu County as:bad natural climate,complicated geographical conditions,and poor basic agricultural conditions;extensive farming methods,lack of effective supervision and guidance;selection of main crops and poor fertilizer application programs.It is reasonable,and there is no matching plan based on local conditions.Based on the existing problems of the research positioning,the following main solutions and suggestions are given:reasonable allocation of arable land resources,adjustment of the planting industry structure;strengthening of arable land quality management;scientifically nourishing land and fertilizing,and improving soil fertility.