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一、选种目标 当前鄂西山区洋芋(马铃薯)生产上存在的主要问题,一是单产不高,二是产量不稳。单产不高的原因,很大程度上是缺乏生产力高的品种。如本区栽培面积较大的早熟品种本地毛洋芋、白洋芋,既不抗病,生产力也低,常年产量只有400斤左右,即使在加强防病措施的情况下,产量一般也不到千斤;生产力较高的老龄洋芋、广东洋芋常年产量也只600—700斤。产量不稳的原因,
First, the selection target Hubei Western mountain potato (potato) the main problems in the production, first, yield is not high, the second is the output is not stable. The reason for the low yield is due in large part to the lack of high productivity varieties. For example, in the precocious cultivated area in this area, the local hairy potato and white potato are neither resistant to disease nor low in productivity. The perennial output is only about 400 kilograms. Even under the condition of strengthening disease prevention measures, the yield is generally less than 1,000 kilograms. High-yielding aged potato, Guangdong potato yield only 600-700 pounds. The reasons for the instability of production,