河南省几年來曾在各地進行了冬小麥早春追肥的試驗和示范工作。結果,凡是早春追施速效氮肥的均有不同程度的增產效果,一般每畝施10—20斤硫銨或500—1,000斤人尿,均可增產20—30％。这一增產措施,在河南省的黄泛区、博爱、中牟、板桥、民权、許昌、息縣等七个國营農場中已經廣泛应用。前年和去年这些農場在十來万畝的麥田中,均 In recent years, Henan Province has carried out experiments and demonstration work on top-dressing winter wheat in early spring. As a result, all of the early spring topdressing available nitrogen fertilizers have different levels of stimulation effect, generally 10-20 kg ammonium sulfate per acre or 500-1,000 kg urine, can increase 20-30%. This increase in production has been widely applied in seven state-owned farms in the Yellow River, Henan Province, Pan Pacific, Zhongmu, Banqiao, Minquan, Xuchang and Xixian. The previous year and last year these farms in more than ten acres of wheat fields, both