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玉米杂交种质量好坏,直接影响到新品种的推广以及育种单位经济效益,而在全国范围内玉米种子纯度偏低的现象普遍存在。1990年——1994年全国部分省区所产杂交种进行种子纯度(成熟期)种植鉴定,状况如下:
The quality of maize hybrids directly affects the popularization of new varieties and economic benefits of breeding units, while the phenomenon of low purity of maize seeds is widespread across the country. 1990 - 1994 hybrids of some provinces and autonomous regions nationwide seed purity (maturity) planting identification, the status is as follows: