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2002—2009年安徽省巢湖市农科所进行中9A繁殖,每年繁殖面积3～4hm2,平均单产2.55t/hm2,最高单产达3.97t/hm2。总结了中9A高产繁殖技术措施。
In 2002-2009, the Agricultural Science Institute of Chaohu City, Anhui Province carried out breeding in 9A with an annual breeding area of 3 ~ 4hm2, with an average yield of 2.55t / hm2 and the highest yield of 3.97t / hm2. Summed up the 9A high yield breeding techniques and measures.