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发表于 2014-3-24 19:05:37
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转至第68楼第 68 楼 伯拉图 2014/3/24 0:31:12 的原帖:不到黄河你心不死:
最后我们再来看看崔永元在其政协提案中提及的美国农业部报告。美国农业部在2014年2月发布的报告《美国遗传工程作物》(Genetically Engineered Crops in the United States)归纳总结了40项关于转基因作物的产量、杀虫剂
使用和净收益的研究结果,其中23项增产,1项小增产,11项产量不变,1项小减产,4项无相关数据。可见大部分的研究结果都认为种植转基因作物能够增产,该报告的结论也认为:“采用Bt作物通过减轻虫害损失增加了产量。不过,关于抗除草剂作物对产量的影响的观察证据有好有坏。一般来说,复合种子(具有超过一种遗传工程性状的种子)会比常规种子或只有一种遗传工程性状的种子的产量更高。”
报告原文,有页码,红字说不增产:
“Over the first 15 years of commercial use, GE seeds have not been shown to increase yield potentials of the varieties. In fact, the yields of herbicide-tolerant or insect-resistant seeds may be occasionally lower than the yields of conventional varieties...[p. 12] ... The fact that several researchers found no significant differences between the net returns of adopters and nonadopters of HT [herbicide tolerant] crops (particularly HT soybeans) despite the rapid adoption of these crops suggests that many adopters may derive nonmonetary benefits from HT adoption. In particular, weed control for HT soybeans may be simpler, freeing up management time for leisure, enterprise growth, or off-farm income-generating activities [p. 22].”
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