为何今年广西的木薯单产低和含粉量少？
广西贺州李先生问
答：由于广西持续的严重干旱，尤其为前二年冰灾后选取了不良品种（劣质、退化和适当性差等）的后续影响，使之广西很多地区的木薯单产很低（严重的仅为冰灾前的60%左右），含粉量也大大减少（平均仅约为正常年份的76—80%）。
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