河南地处中原,拥有耕地一亿零六百多万亩。黄淮海平原约占全省面积的43%,土壤资源比较丰富,是我国现代化农业发展基地之一。近年来,由于产量的不断提高,氮化肥使用量的增加,土壤营养元素比例失调的矛盾越来越突出,微量元素硼的缺乏症状 Henan is located in the Central Plains, with more than 106 million mu of cultivated land. Huanghuaihai plain accounts for about 43% of the province’s area, rich soil resources, is one of China’s modern agricultural development base. In recent years, due to the continuous improvement of production, the use of nitrogen fertilizer increased, the imbalance of nutrient elements in soil more and more contradictory, the lack of trace elements boron