当前杂交玉米种子纯度下降的原因与对策山西省吕梁地区种子公司（离石０３３０００）张建益杨兰英我区是全省四大杂交玉米制种基地之一。近年来，生产的“两杂”种子除满足本区需要外，还销往全国各地。如何进一步发挥优种增产作用，确保制种生产的优势，关键在于种子纯度... Current Purity and Countermeasures of Reducing the Purity of Hybrid Corn Seeds Shanxi Luliang Seed Company (Lishi 033000) Zhang Jianyi Yang Lanying My area is one of the four major hybrid seed production bases in the province. In recent years, the production of “two hybrid” seeds in addition to meet the needs of this area, but also sold throughout the country. How to give full play to superior seed production, to ensure the advantages of seed production, the key lies in seed purity ...