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连续三年在吉林省白城地区前郭、大安两县草场上,通过NPZn三因素五水平最优回归设计试验,筛选出羊草高产、经济效益显著的NPZn合理用量及比例,然后在长山化肥厂加工成复合粒肥,用于大面积草场飞施作业。结果表明,以尿素、重过磷酸钙.硫酸锌单质混配的粉肥人工施入.适宜的养分用量N为6～8kg/亩,P_2O_5 6～9kg/亩,Zn 0.4kg/亩。其比例为1:1:0.06,可得干草223～295 kg/亩,每公斤粉配肥可增干草 8～13kg.用单质肥料加工造粒的NPZn三元复合肥.飞机作业,每亩施入20～25kg,每公斤复合粒肥增干草10.4kg以上。纯收益5～5.57元,大大提高了工效,是草原现代化施肥的可行措施.
For three consecutive years in the pasture of Baiguo County, Jilin Province, Da’an County grassland, NPZn three-factor five-level optimal regression design and testing, screening out a high yield of Leymus chinensis, significant economic benefits of NPZn reasonable dosage and proportion, and then in Changshan Chemical Fertilizer Factory processed into compound fertilizer, for large areas of grassland flying operations. The results showed that manure was applied to manure mixed with urea, SSPS and ZnSO4, and the suitable nutrient N was 6 ~ 8kg / mu, P_2O_5 6 ~ 9kg / mu, Zn 0.4kg / mu. The ratio of 1: 1: 0.06, available hay 223 ~ 295 kg / mu, kg of powder per kilogram of hay can be increased by 8 ~ 13kg. Granulation with NPZn granulated fertilizer fertilizer. Aircraft operations, Into 20 ~ 25kg, kg of compound fertilizer per kilogram by more than 10.4kg hay. Pure income 5 ~ 5.57 yuan, greatly improving the work efficiency, is a feasible measure of modern grassland fertilization.