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从杂交水稻的发展历程中,提出了"超级杂交稻",论证了超级杂交稻超高产是可行的.通过超级杂交稻超高产栽培理论,探讨了超级杂交稻所特有的生理特性和生态特性及主要成熟的超级杂交稻超高产栽培技术途径,分析超级杂交稻超高产栽培存在的主要障碍并提出了解决的途径. 相似文献
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超级杂交稻超高产栽培研究进展 总被引:6,自引:0,他引:6
从杂交水稻的发展历程中,提出了“超级杂交稻99论证了超级杂交稻超高产是可行的。通过超级杂交稻超高产栽培理论,探讨了超级杂交稻所特有的生理特性和生态特性及主要成熟的超级杂交稻超高产栽培技术途径,分析超级杂交稻超高产栽培存在的主要障碍并提出了解决的途径。 相似文献
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大力开展“种三产四”推动湖南水稻持续发展 总被引:1,自引:0,他引:1
回顾了超级杂交稻"种三产四"丰产工程项目提出的背景,介绍了2007—2017年项目实施的5种种植模式、6项主推技术、26个示范超级杂交稻品种及其推广面积和增产效果,总结了加强项目组织实施的成功经验。认为超级杂交稻"种三产四"丰产工程技术将融入到未来满足种植农户与市场需求、促进水稻生产可持续发展的进程中去,有着广泛的应用前景。 相似文献
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超级杂交稻生理生态特性及高产稳产栽培调控的研究进展 总被引:4,自引:0,他引:4
综述了近年来超级杂交稻高产生理研究进展。与普通高产水稻相比,库容量大、物质生产与积累能力强、光合生产能力强、根系发达是超级杂交稻重要的超高产生理基础,然而,其养分吸收量大、中后期养分吸收能力强、异步灌浆特性明显、生态适应性要求严格的生理生态特性,对高产稳产栽培调控技术提出了新的要求。因此,在超级杂交稻的生产中,应采取因种因地种植、适时播种、适当增施肥料、加强中后期营养、加强稳健群体调控、增苗争多穗与控苗争大穗相结合等栽培调控技术策略。同时,超级杂交稻的高产稳产还面临着产量稳定性差、高产田倒伏、高产与高效难协调、气候变化等问题。为有效应对和解决这些问题,应当加强超级杂交稻的生态适应性技术、抗倒稳产调控技术、高效栽培技术、气候变化适应性栽培技术等方面的研究。 相似文献
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湖南超级杂交稻研究示范取得重大进展 总被引:1,自引:0,他引:1
由袁隆平院士主持的超级杂交稻研究项目自1996年启动以来,受到党和政府的高度重视。胡锦涛、温家宝等党和国家领导人先后专程赴湖南杂交水稻研究中心视察超级杂交稻的研究进展;国务院两任总理朱镕基、温家宝先后特批专项经费支持超级杂交稻的研究与示范工作;培育和推广超级稻写进了国家“十一五”发展规划;国家科技部、农业部也立项支持超级杂交稻的研究与示范;湖南省委、省政府高度重视并支持超级杂交稻的研究与推广, 相似文献
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两系超级杂交稻育种研究进展 总被引:10,自引:1,他引:10
综述了近年来中国在两系超级杂交稻育种理论与实践中取得的进展,提出了两系超级杂交稻育种的主攻方向和策略,认为以分子育种技术为核心,进行种质创新及亲本遗传改良是今后两系超级杂交稻育种的关键。 相似文献
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针对豫北地区的大豆生产现状,从气候、土壤、品种、生态因素及市场需求等方面提出了优质大豆的发展策略与途径。 相似文献
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以长沙县高桥相同嫩度茶鲜叶原料采用卷曲形毛尖茶加工工艺制绿茶为对照,分别对沅陵县齐眉翠峰、凤娇碣滩茶、干发茶和军大坪茶4种绿茶的主要生化成分与感官品质进行初步分析。结果表明,沅陵4种绿茶的茶多酚总量28.76%~30.34%,游离氨基酸总量2.35%~3.22%,咖啡碱含量3.00%~3.63%,水浸出物含量37.26%~40.07%,可溶性糖总量5.46%~5.65%,可溶性蛋白含量1.50%~1.74%,类黄酮化合物总量1.16%~1.79%,叶绿素总量1.36%~2.01%,儿茶素总量13.53%~16.20%。与对照相比,4种绿茶的茶多酚、可溶性糖和儿茶素总量均高于对照,除齐眉翠峰外其余3种茶样水浸出物和叶绿素总量均高于对照,除干发茶外其余3种茶样类黄酮化合物总量均高于对照。 相似文献
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Irrigation of Netted Gem potatoes was scheduled during three growing seasons by three methods: (a) when plants displayed first visual symptoms of moisture stress, (b) when indicated by a soil moisture budget involving estimated evapotranspiration, and (c) on the basis of tensiometer readings of soil moisture suction. When the tensiometer method of scheduling was used, the mean yields of tubers were 55.0 and 25.8 cwt/acre (6160 and 2890 kg/ha) higher than those obtained with the other two scheduling methods. Methods did not affect the specific gravity of potatoes. Method (a) scheduled irrigations least frequently. Scheduling by the budget method was not always adequate because it was based on the assumption that the crop extracted water from a constant 4 ft (1.2 m) profile from planting to full vegetative growth. In one year the budget method scheduled the first irrigation earlier than necessary and delayed the second irrigation during a critical period of crop growth. From full vegetative cover to harvest the irrigation schedules were alike for both the budget and tensiometer methods. 相似文献
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1 吉林省平安农业科学院大豆研究工作简介吉林省平安农业科学院大豆研究所 ,设在吉林省长春市西安大路种子大厦内。现有科技人员 6人 ,其中研究员 2人 ,农艺师 2人 ,技术员 2人 ,定向培养研究生 2人。大豆研究所的主要任务是选育稳产、高产、优质及抗病虫大豆新品种 ;同时密切 相似文献
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Sena L.P. VanderJagt D.J. Rivera C. Tsin A.T.C. Muhamadu I. Mahamadou O. Millson M. Pastuszyn A. Glew R.H. 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,52(1):17-30
In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply. 相似文献
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实施茶叶优势区域规划促进川茶产业持续发展 总被引:1,自引:0,他引:1
为了充分发挥四川茶叶的比较优势和自然资源优势,进一步提高川茶产业竞争力和促进农民增收,在四川省委、省政府重视下,在开展特色茶叶产品研究的基础上,制订了<四川省茶叶优势区域规划>,以期通过"规划"的实施,在基地建设、规模化生产、产业化经营等方面取得新的突破,为四川省盆周山区和丘陵地区的农村经济发展和农民增收做出新的更大贡献. 相似文献
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通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT50)的变异范围为-7.6~-0.2 ℃(最低值与最大值相差7.4 ℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0 ℃和-5 ℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5 ℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0 ℃和-5 ℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。 相似文献