田间试验于1981—1984年在盛果期NewcastIe杏树上进行,采用三种氮浓度(200、400、600克/株)和四种施用方法(单一的土壤施用和土施+1—3次喷尿素,每次每株喷5升1%尿素水溶液)。400克氮十二次喷尿素,即第一次在四月的第二周,当叶片完全展开时,第二次在两周以后施用,结果获得了最适宜的营养生长,较大的果实,较高的产量,并且改善了树体氮状况。 Field trials were conducted on freshcastle Apricot from 1981 to 1984 with three nitrogen concentrations (200, 400, 600 g / plant) and four application methods (single soil application and soil application + 1-3 times Spray urea, spraying 5 liters of 1% urea solution per plant). 400 g Nitrogen twelve doxorubicin, the first time in the second week of April, when the blade was fully unfolded, the second time after two weeks of application, the optimum vegetative growth, larger fruit, Higher yield, and improved tree nitrogen status.