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田间小区种植是目前鉴定玉米杂交种纯度最准确、最可靠的办法。1996～1998年,我省连续三年对省内各种子专营生产的近千份玉米杂交种,由省局组织统一抽样,集中种植纯度鉴定,积累了一些实践
Planting in the field is the most accurate and reliable method for identifying the purity of maize hybrids. From 1996 to 1998, nearly three thousand maize hybrids produced by the various sub-monopolies in the province for three consecutive years were collected by the provincial bureau in a unified way, with the purity identification of planting cultivation concentrated and some practices accumulated