稳步推进“种三产四”丰产工程促进粮食持续稳定增长

来源 :杂交水稻 | 被引量 : 0次 | 上传用户:morgan1912
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
超级杂交稻“种兰产四”丰产工程已在湖南实施5a(2007-2011),示范县(市、区)从20个扩大到47个,累计示范推广面积达83.78万hm2,增产稻谷16.54亿kg.总结了“种三产四”丰产工程实施的种植模式、示范组合、主推技术及保障措施,提出了存在的主要问题和对策,并展望了未来的发展计划和前景.
其他文献
Renal cell carcnoma (RCC) metastasizes to the duodenum is extremely rare.There are only few cases reported to date.Most authors recommended aggressive surgery t
过去二十年内,德国福利与就业制度的开放性政治经济举措,以及对基本政治联合产生的不良影响,值得关注。德国福利与就业体系面临着自由化进程,但没有向自由市场经济发展。对由
Plants have diverse strategies to cope with phosphorus (P) deficiency.To better understand how maize responds to P deficiency,a field experiment with two P leve
The toxicity of chlortetracycline (CTC) on maize (Zea mays L.) growth and reactive oxygen species (ROS) generation was studied.The root and shoot lengths and fr
Extra-adrenal myelolipomas are extremely rare,especially in bronchus and lung.Up to now,only nine cases of intra pulmonary lesions have been reported all over t
The effects of direct extracts of compost (DEC),aerated fermentation extracts of compost (AFEC) and non-aerated fermentation extracts of compost (NAFEC) on cucu
Although lung metastasis is common in renal cell carcinoma (RCC),only a few cases of pleural metastasis without lung involvement have been reported.We present h
当前我国海外R&D(研究与开发)活动存在“主体性”缺位,大企业跨国R&D活动与中小民营科技企业之间存在体制性阻隔,海外R&D微观主体的低层次性及其在国际R&D联盟中被“边缘化”
Background Haikou locates in tropical island with unique mite propagation.The aim of this stuy is to determine mite allergens levels in Haikou,and to investigat