排序方式： 共有91条查询结果，搜索用时 15 毫秒
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"中国水稻节水灌溉技术的影响"、"用更少的水生产更多的稻谷-提高水稻种植区水分生产率"项目是由澳大利亚国际农业研究中心资助,武汉大学、国际水管理研究院、国际水稻研究所、湖北省漳河工程管理局、英联邦工业与科技研究组织土地与水研究部等单位共同承担.项目研究分为两个阶段,第一阶段为1998-2000年.以湖北漳河灌区作为研究对象,于1998年选择项目试验区并进行了开展试验研究所必需的基础设施建设,1999～2000年在湖北漳河灌区开展了大规模田间试验研究,以及室内数据分析工作. 相似文献
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Responses of Contrasting Rice （Oryza sativa L.） Genotypes to Salt Stress as Affected by Nutrient Concentrations 总被引：1，自引：0，他引：1
ZHANG Zhen-hua LIU Qiang SONG Hai-xing RONG Xiang-min Abdelbagi M Ismail 《中国农业科学(英文版)》2011,10(2):195-206
The study was conducted to investigate the effects of applying different concentrations of the macronutrients K+,Ca2+,and Mg2+on the responses of contrasting rice(Oryza sativa L.)genotypes under salt stress.A solution culture experiment was conducted in a phytotron at the International Rice Research Institute(IRRI),under controlled temperature and humidity and natural sunlight.When subjected to salt stress of 100 mmol L-1 using NaCl,the salt tolerant genotypes FLA78 and IR651,accumulated less Na+and maintained lower ratios of Na+/K+,Na+/Ca2+,and Na+/Mg2+than the sensitive genotypes IR29 and Azucena.These tolerant genotypes also had higher concentrations of K+in their shoots and greater root and shoot biomass and green leaf area.Tolerant genotypes also maintained much lower concentration of Na+and lower and more favorable ratios of Na+/K+,Na+/Ca2+,and Na+/Mg2+in their active and developing tissues.Salt tolerance and shoot and root growth of both tolerant and sensitive genotypes were enhanced considerably when higher concentrations of Ca2+and Mg2+were applied in culture solution.The concentration of Na+and the ratios of Na+/K+,Na+/Ca2+.and Na+/Mg2+ in shoots also declined significantly.The beneficial effects of higher calcium were greater than that of magnesium and application of higher concentration of K+seems to have minor effects.Responses to salinity in rice can therefore be considerably enhanced through proper nutrient management,by increasing the concentrations of nu～ient elements that have favorable effects such as Ca2+and Mg2+Calcium is particularly more effective than both magnesium and potassium,and can be applied at relatively larger quantities in salt affected soils. 相似文献
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1981年日本首次提出水稻超高产育种,1989年国际水稻研究所正式开展水稻超高产育种研究,计划至2005年育成平均667平方米产量达800公斤的水稻新品种,但由于技术路线欠妥,至今尚未大面积实现这一目标。我国农业部于1996年立项启动了“中国超级稻育种”计划,在着力提高产量潜力的同 相似文献
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总部位于菲律宾的国际水稻研究所14日称,多国专家计划通过改变水稻的光合作用类型,开发出利用较少的水份和肥料、产量却能增长50%以上的新品种.这项历时至少10年的实验室计划将汇集来自全球科研机构的分子生物学家、遗传学家、生理学家和生物化学家. 相似文献
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