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我县大面积推广根外施肥是从1977年开始的。三年来施用的作物由水稻一种发展到麦子、油菜、草子、大豆等;施用面积也由多点试验到全面推广;肥料种类由单元素发展到多元素混用。1977年晚稻施用13万多亩,共用地产磷酸二氢钾105担。1978年全县大小麦施用43072亩,早稻施用118406亩,晚稻施用125682亩,绿肥、油菜等其他作物2万多亩,全县共计307160亩次,光是地产磷酸二氢钾就用掉620担。1979年全县粮、油、肥三季作物全面进行磷酸二氢钾、硼砂、钼酸铵等根外追肥,面积达到59万多亩次,共用磷酸二氢钾1150担,硼砂121担,钼酸铵116公斤。其中喷一次的面积占粮油肥复种面积的80％以上,喷二次的占56％,许多杂交稻还喷过三次。实践证明,使用磷酸二氢钾等
Extensive popularization of fertilization in our county from 1977 onwards. Three years of crop application from the development of a rice to wheat, rapeseed, grass, soybeans and so on; application area is also multi-point test to promote the comprehensive; fertilizer types from single element to multi-element mix. In late rice in 1977, more than 130,000 mu were used, sharing 105 units of potassium dihydrogen phosphate for land use. In 1978 the county large and small wheat use 43072 acres, 118406 acres of early rice, 125682 acres of late rice, green manure, rapeseed and other crops more than 20000 acres, the county a total of 307160 acres, light is potassium dihydrogen phosphate on the land to use 620 . In 1979, the crop of crops of grain, oil and fertilizer in the whole county was fully subjected to top dressing such as potassium dihydrogen phosphate, borax and ammonium molybdate, covering an area of more than 590,000 mu, sharing 1150 dan of potassium dihydrogen phosphate, 121 dan of borax, 116 kg of ammonium. Spray once accounted for more than 80% of the area of crop oil and fertilizer, sprayed twice accounted for 56%, many hybrid rice also spray three times. Practice has proved that the use of potassium dihydrogen phosphate and so on