排序方式: 共有14条查询结果,搜索用时 31 毫秒
1.
在分析了中国农业科学院图书馆国外科技文献订购及到货现状的基础上,从优化本馆文献订购模式、完善文献到货催缺制度、加强相关制度落实等角度,探讨了有效提高农业及相关学科国外科技文献订到率、到货率、到全率及保障能力的方法。 相似文献
2.
3.
4.
Yanli Lu Zhuanfang HaoChuanxiao Xie Jose CrossaJose-Luis Araus Shibin GaoBindiganavile S. Vivek Cosmos MagorokoshoStephen Mugo Dan MakumbiSuketoshi Taba Guangtang PanXinhai Li Tingzhao RongShihuang Zhang Yunbi Xu 《Field Crops Research》2011,124(1):37-45
A total of 550 maize inbred lines collected from global breeding programs were evaluated for drought resistance under both well-watered and water-stressed environments. The evaluation was based on multiple measurements of biomass taken before and after the drought stress was applied using the normalized difference vegetation index (NDVI), along with other selection criteria including anthesis-silking interval, leaf senescence, chlorophyll content, root capacitance, final grain yield, and grain yield components. Kernel weight was the most stable trait under drought stress. Correlations between the primary trait (grain yield) and the secondary traits, except the root capacitance and ASI under water-stressed condition, were all significant. Root capacitance had relatively low heritability and low genetic correlation with other drought resistance criteria, and is not recommended as a drought resistance criterion. Significant reduction of NDVI values measured in the afternoon when the leaves became rolling, compared to those measured in the morning when the leaves were open, provides a reliable index for leaf rolling, which however was not significantly correlated with grain yield. NDVIs measured across different developmental stages were highly correlated with each other and with most of the secondary traits as well as, grain yield, indicating that NDVI can be used as a secondary trait for large-scale drought resistance screening. Regression models built based on non-yield drought criteria and yield components explained about 40% and 95% of the variation for the grain yield, respectively. Some maize lines developed in China for temperate regions showed strong drought resistance comparable to tropical maize lines when tested under tropical condition, indicating that temperate lines with a wide adaptability can be used in drought resistance breeding for both temperate and tropical environments. 相似文献
5.
近年来,中国农业科学院在基因研究领域取得了一大批具有国际先进水平的重大科研成果,为把握基因研究快速发展的现状,掌握该领域的研究动态,本文以文献计量学方法,对中国农业科学院基因研究文献进行统计分析并得出一些结论,为研究人员进一步的研究和制定发展计划提供参考数据。 相似文献
6.
主要发达国家科技成果保护状况及其启示 总被引:1,自引:0,他引:1
whflp@yahoo.com.cn 《中国农学通报》2006,22(5):496-496
(中国农业科学院农业信息研究所,北京100081) 相似文献
7.
油菜皮壳中多酚氧化酶活性的组织化学检定及其与粒色的关系 总被引:4,自引:0,他引:4
以组织化学法及抑制剂处理研究了油菜种子成熟前皮壳中的多酚氧化酶活性有无、存在部位及其与粒色的关系。结果表明,甘蓝型和白菜型油菜种子成熟前,皮壳(包括种皮和糊粉层,下同)的栅栏层存在较强的多酚氧化酶活性;黄籽皮壳的活性略低于黑籽皮壳的,但当有足够的多酚化合物存在时,黄籽皮壳也能象黑籽皮壳一样变为黑色。黑籽油菜变色前的种子用抗坏血酸处理,多酚氧化酶活性受到抑制,呈色过程中断,种子呈纯黄状态。说明多酚氧化酶对籽粒的呈色极为重要。 相似文献
8.
杜彬 《农业科研经济管理》2011,(2):40-42
研究生是科技创新的生力军,研究生教育是人才队伍培养和创新团队建设的重要组成部分。该文通过对中国农科院全日制研究生教育工作的效果分析,深入剖析了制约全日制研究生教育发展的影响因素,对建设现代农业科技人才培养模式的问题进行探讨,并提出相关对策建议。从而促进中国农科院研究生教育事业进一步壮大发展,源源不断为建设社会主义新农村和创新型国家培养、造就高层次农业科研人才。 相似文献
9.
jingfei_wang@hotmail.com 《中国农学通报》2006,22(3):384-384
Ji Zengtao1,2, Wang Jingfei1, Yang Yantao1,2, Li Jing1,2,Wu Chunyan1,
Wang Hongbin2, Liu Yun2 相似文献
10.
中国农业科学院是国家级综合性农业科研机构,创建于1957年,担负着全国农业重大基础与应用基础、应用研究和高新技术研究的任务。建院50年来,在引领全国农业科技发展,攀登科学技术高峰,解决农业及农村经济建设中基础性、战略性、全局性、关键性重大科技问题,组织全国农业科研大协作等方面做出了重要的支撑性贡献。 相似文献