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我国玉米杂交制种区主要分布在新疆、青海、甘肃、宁夏、陕西、山西、内蒙古、河北、辽宁、吉林等地。这些地区地理位置不同,气候类型各异,年降水量差异极大,灌溉条件不一。生产管理、技术水平、交通运输、制种成本各有千秋。玉米杂交种子生产是以农户为基本单元,依靠镇(乡、兵团、农场)村组织协调,种子公司与农户签订制种合同直接管理进行制种,或者委托其他公司生产,无论是
Maize hybrid seed production areas in China are mainly distributed in Xinjiang, Qinghai, Gansu, Ningxia, Shaanxi, Shanxi, Inner Mongolia, Hebei, Liaoning, Jilin and other places. Different geographical locations and climate types in these areas have great differences in annual precipitation and irrigating conditions. Production management, technical level, transportation, production costs have their advantages and disadvantages. Maize hybrid seed production is based on the basic units of farmers, relying on the town (township, corps, farms) village organization and coordination, seed companies and farmers signed contract for the production of seed production directly, or commissioned by other companies to produce, either