建平县位于辽宁省西部,耕地总面积276万亩,中低产田在150万亩以上。土壤有机质平均为12.3克/千克,处于缺乏范围;土壤有效养分偏低,全氮平均为0.86克/千克、水解氮平均为68毫克/千克、有效磷平均为8毫克/千克、速效钾平均为140毫克/千克;土壤碱性偏大,p H值平均为8.2;化肥施用量过大、利用率不高,年施用化肥实物量近8万吨。农作物 Located in the western part of Liaoning Province, Jianping County has a total area of ​​2.76 million mu of arable land and over 1.5 million mu of middle-low yield farmland. Soil organic matter average 12.3 g / kg, in the absence of range; soil nutrients are low, the average nitrogen was 0.86 g / kg, hydrolyzed nitrogen average 68 mg / kg, available phosphorus average 8 mg / kg, available potassium averaged 140 mg / kg; soil alkaline is too large, p H value of an average of 8.2; fertilizer application is too large, the utilization rate is not high, the amount of fertilizer used in nearly 80,000 tons. crop