Study On Evaluation And Promotion Strategy Of Cultivated Land In Hengyang County

How the quality of cultivated land affects grain yield,the better the quality of cultivated land,the higher the grain yield and the poor quality of cultivated land,the grain yield will be relatively low,and the evaluation of cultivated land fertility is a very meaningful activity.Through the evaluation of cultivated land fertility,we can better understand how the state of cultivated land in the evaluated area,how the soil nutrients,whether the existing cultivated land condition can meet the food demand and so on,and what measures we can take to promote the grain yield according to the current cultivated land condition.The research area of this study is Hengyang County,Hengyang City,Hunan Province,the research object is cultivated land within Hengyang County.Referring to the data of Hengyang County Agricultural extension General Station in 2016,the cultivated land fertility of Hengyang County is studied and evaluated by multi-objective comprehensive evaluation method.After the analysis of each evaluation index,the five indexes composed of site condition,physical and chemical character,obstacle factor,profile character and soil management were evaluated and analyzed on ten factors,such as topographic location,texture of tillage layer,drainage capacity,irrigation guarantee rate,obstacle layer condition,profile configuration,organic matter,available phosphorus,slow-acting potassium and thickness of tillage layer.Through the research on cultivated land fertility in Hengyang County,the evaluation results of cultivated land fertility in Hengyang County are obtained.From the factors that affect the quality of cultivated land in Hengyang County,the existence of soil barrier layer,the use of chemical fertilizer,agricultural infrastructure,early waterlogging and other factors affect the quality of cultivated land in Hengyang County.Based on the evaluation results of cultivated land fertility,scientific suggestions are put forward for different grades of cultivated land.The main measures of cultivated land improvement are as follows: applying soil-measured formula or balanced fertilization method because of soil fertilization;implementing rotation system and implementing two-cooked rotation in mountainous areas;strengthening field management and maintenance of cultivated land quality;strengthening water conservancy construction and supporting irrigation facilities.