Research Of The Division Based On Soil Testing And Fertilizer Recommendation In Linquan County

In recent years, blind and excessive fertilizer phenomenon appears in some areas of China, whichleads to a sharp increase of fertilizer application amount. In the types of fertilization, its a commonphenomenon that we pay much attention to inorganic fertilizer and nitrogen, but neglect organic manure,phosphorus and potassium, which result in the imbalance of soil nutrient, production cost increases,grain yield increase speed decreases, profits increase is not obvious, agricultural production capacityreduction, it not only increases the cost of fertilizer, but also causes the pollution of the farmland andrivers and the decline of the agricultural products quality.We can improve the fertilizer use efficiency and reduce the amount of fertilizer by applying soiltesting and fertilizer recommendation technology, increase crop yields, protect agricultural ecologicalenvironment, improve the quality of agricultural products, build up soil fertility, reduce production cost,realizing the sustainable development of agriculture, which is very important in the agriculturalproduction. It is an effective way to develop the "high quality, high yield and high efficiency"agriculture and increase the farmers’ income in.The fertilization rule suit for this area was found out through soil testing（8131） and the fieldexperiment of fertilizer effect（47） in this study based on Linquan county in Anhui province.1Found out the soil nutrient status of Linquan county. The soil nutrient status of cultivated landwas as follows: the organic matter content was16.79g/kg, total nitrogen was1.07g/kg, availablephosphorus was30.88mg/kg, the available potassium was135.57mg/kg, effective copper was1.69mg/kg, effective zinc was0.75mg/kg, the effective manganese was56.86mg/kg, the effective iron was54.18mg/kg, the effective boron was0.28mg/kg, effective sulfur was19.22mg/kg, all of the above werecalculated on average.Compared with the second national soil survey data, the average organic matter content increased2.57g/kg, increased by18.24%; total nitrogen increased0.074g/kg, increased by7.43%; availablephosphorus increased21.88mg/kg, increased by243.11%; potassium decreased27.43mg/kg, reduced by16.83%.According to the nutrient level division standard, organic matter, available potassium belong tothird level, effective phosphorus belong to secondary level, total nitrogen belong to fourth level; iron,copper, manganese are abundant in microelement, but boron, zinc are relatively low and scare as awhole.Overall, in Linquan county, the content of organic matter, total nitrogen, and available potassiumin topsoil are low to moderate, available phosphorus is abundant, and boron and zinc are deficient. Sowe should apply more organic fertilizer, and control the amount of phosphate, stabilize the amount ofnitrogen, replenish potassium and add zinc and boron.2The farmland was classified and grading in Linquan county. County land resourcemanagement information system software was used to operate on the external properties database whichcan evaluate farmland grade, retrieve and statistics the arable land acreage of each grade and the total acreage of the map. Based on total cultivated area of113,474hectares in2009in Linquan county,the acreage of each grade arable land was calculated, the total cultivated area of Linquan county is113,474hectares, of which the first level acreage is22386.15hectares, accounting for19.73%of thetotal, the second level is46221.29hectares, accounting for40.73%of the total, the third level is29656.77hectares, accounting for26.14%of the total, and the fourth level is15210.24hectares,accounting for13.40%of the total.3The fertilization index system of main crops was established in Linquan. Wheat and cornfertilizing index system were established in the first, second, third and fourth farmland grade,the bestfertilizer rates of wheat and corn were gotten in different soil fertility level, and a fertilizationprescription was generalized in different areas of different crops fertilization. To some extent, thefertilization pertinence was improved by using management division to recommend fertilization, andthan we can achieve fertilization according to soil and precise management. According to fertilizationzoning maps, the corresponding regional fertilization recommended plan was put forward to guide therational fertilization farmers. Under this foundation, crops specific formula was proposed, localagricultural department was organized and crops specific formula fertilizer were produced bymanufacturer fat to realize the regional fertilizer and fertilizer intensive using.