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生日吸尘器
Catalog: Лайфстайл 
17 hours ago · From China Online
本文考察了所谓的“只产第一代作物的种子”的现象——这些种子只能在第一代产出作物,不能用于后续播种。基于对基因使用限制技术(GURT)的历史分析——也被称为“终结者技术”——以及目前市场上可获得的F1杂交种,本文重建了哪些种子确实需要每年购买以及原因的实际图景。特别关注区分神话与事实:世界上没有任何一家农业公司将转基因不育种子商业化,但在市场上广泛可得的F1杂交种在生物学上不适合用于留种。对于乌克兰的农业部门而言,农民每年在杂交品种的产量与传统品种的成本节约之间做出权衡,理解这些机制具有特别的实际意义。
77 days ago · From China Online
 

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