黑龙江省纤维亚麻由1949年19.2万亩发展到目前年种植200万亩左右,面积扩大10.4倍,原茎亩产由68公斤增加到175公斤,翻了一番还多。但近几年有些地区只追求原茎高产,忽视了对纤维质量的要求,使亚麻品质呈下降趋势。据调查:部分原料厂收购的三等茎占50%以上,一、特等茎尚不足20%;长麻率由10～12%下降到8～10%;原12号长麻强力超过25公斤,现仅有18～ Heilongjiang Province, from 192,000 mu of fiber flax in 1949 to the current annual planted about 200 acres, an area of ​​10.4 times the expansion of the original stem per mu from 68 kg to 175 kg, more than doubled. However, in recent years, only some areas of the pursuit of high yield of the original stems, ignoring the requirements of the fiber quality, so that the quality of flax showed a downward trend. According to the survey: some of the acquisition of raw materials, plants accounted for more than 50% of the three stems, a special stem is less than 20%; longan rate from 10 to 12% down to 8 to 10% Now only 18 ~