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碳酸氢铵(以下简称碳铵)施用量约占我县氮肥总用量的70％左右。因此,对碳铵合理施用技术的研究,指导大面积农作物增产增收,有着重要意义。几年来,为了在我县干旱少雨的自然条件下合理施用碳铵,进行了多点、多次的试验研究,收到了明显的效果,曾获1983年河北省科委发展研究三等奖。一、碳铵底肥深施肥效碳铵做底肥深施的最适亩用量折纯氮为22.5斤(以碳铵含氮17％折算,22.5斤纯氮合132斤碳铵),亩产棉花147斤;若以亩施
Ammonium bicarbonate (hereinafter referred to as ammonium bicarbonate) the amount of about the total amount of nitrogen fertilizer in our county about 70%. Therefore, the rational application of ammonium bicarbonate technology to guide the large area of ?? crop yield increase, of great significance. In recent years, in order to use ammonium bicarbonate rationally in arid and rainy natural conditions in our county, we carried out more and more experimental studies and received notable results. We won the third prize of Hebei Science and Technology Commission Development Research in 1983. First, the carbonic fertilizer at the end of fertilizer deep fertilizer ammonium bicarbonate fertilizer to do the most suitable amount of deep application of pure nitrogen is 22.5 kg (17% conversion of ammonium bicarbonate, 22.5 kg of pure nitrogen and 132 kg of ammonium bicarbonate), per acre cotton 147 Jin; if mu Shi