从 1 98 6年开始 ,进行多点试验、示范 ,摸清了本地农业作物需肥规律、土壤的供肥性和肥料效应 ,提出了 N、P、K及微量元素的适宜用量比例。采用肥料效应函数确定氮肥 ;采用双直线法确定磷、钾肥和微肥。 1 0年来累计推广配方施肥 1 3万公顷 ,增产粮食 1 .5亿 kg,总效益增加 1 .5亿元左右。 Beginning in 1986, a number of experiments were carried out to demonstrate and understand the laws governing the demand of fertilizers in local agricultural crops, soil fertility and fertilizer effects, and put forward appropriate proportions of N, P, K and trace elements. Fertilizer effect function was used to determine nitrogen fertilizers; phosphorus, potassium and trace fertilizers were determined by bilinear method. Over the past 10 years, a total of 130,000 hectares of formula fertilizer has been popularized, an increase of 115 million kg of grain has been produced, and the total benefit has increased by 155 million yuan.