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华南地区1987年杂交稻面积不到2000万亩,仅占水稻播种面积的15%。1990年杂交早稻2271万亩,占早稻播种面积的43.1%,杂交晚稻3240万亩,占晚稻面积的57.4%,并选选配了一批各具特色的新组合,两系法杂交稻示范推广已初具规模。 相似文献
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优质杂交稻籽粒灌浆结实特性及气象条件的影响 总被引:1,自引:0,他引:1
本文研究了优质要交稻粤优青占、粤优黄占籽粒灌浆结实的特性及气象条件对结实的影响;研究结果表明早、晚稻籽粒灌浆第一次高峰期一般是抽穗后7 ̄11天;灌浆速度;早季是对照品种加青占较快,晚季是粤优黄占较快,早、晚稻抽穗后25天内灌浆速度较快,25天后转慢;晚稻灌浆速度明显大于早稻;结实率亦然;优质杂交稻第二枝梗籽粒干重比普通杂交稻和常规稻重;抽穗期粤优黄占对温度的反应较敏感,粤优青占的耐寒性较好。 相似文献
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对再生稻间作的晚稻品种、育秧技术、头季稻栽插方式及晚稻间作规格和施肥技术进行了研究。提出了在杂交稻头季稻收获后蓄留再生稻。同时,在再生稻行间载无稻并获得高产的栽培技术。 相似文献
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特优175是福建农科院稻麦所与南平市农科所合作,用龙特甫A与南恢175配制成的晚稻杂优新组合.2000年通过福建省农作物品种审定委员会审定.水稻是长汀县第一大粮食作物,每年水稻播种面积为25 300hm2,中稻和烟后稻面积达8 600hm2之多,为选择适宜长汀县中稻和烟后稻种植的高产优质新组合,2003年晚季开始引进了超级杂交稻特优175组合进行试验示范,对其适应性、丰产性、抗病性进行试验示范,为大面积推广提供依据. 相似文献
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概述了湖南省近40年来双季稻栽培技术发展的3个阶段;(1)60年代初至70年代中,以矮秆品种为主的“穗数型”栽培技术阶段;(2)70年代中于80年代末以籼型杂交稻为主的“穗粒兼顾型”栽培技术阶段;(3)进入90年代以籼型杂交稻为主的中秆大穗分蘖力中等的杂交主的“穗重型”栽培技术阶段,还介绍了10种有代表性的双季稻高产栽培技术,并对21世纪的以季稻栽培技术的特点及研究内容进行了探讨。 相似文献
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为了筛选适宜宁德市种植的高产优质晚稻新品种,2009年晚季引进特优716、中优85、中浙优1号、宜优673、Ⅱ优810、闽优3301和两优816共7个杂交水稻新品种进行比较试验,结果表明,中优85增产显著,表现产量高、适应性强、综合性状好,适合当地种植,可在当地示范推广。 相似文献
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长江中下游稻区双季晚粳稻产量生理与资源利用效率研究进展 总被引:2,自引:0,他引:2
长江中下游稻区是我国水稻主产区,同时又是单、双季稻混作区。目前,随着经济发展和人民生活水平的提高,人们对优质大米,尤其是优质粳米的需求日益增加,因此,在双季稻生产中引入粳稻具有重要的现实意义。本文介绍了长江中下游双季稻的温光资源特性,总结了现有双季晚(籼/粳)稻品种的种植表现,从产量、产量结构、干物质积累、群体动态、生育期、温光利用率、稻米品质等方面比较了长江中下游稻区晚粳与晚籼的可能差异。总体来说,双季晚粳在产量、每穗粒数、结实率、千粒重等方面均显著高于晚籼;前期干物质积累两者无显著差异,但是后期干物质积累量晚粳要高于晚籼,晚粳的灌浆率显著高于晚籼,这预示着双季晚粳具有更高的产量潜力。粳稻比籼稻有着较平稳的茎蘖动态,这使其具有更强的后期光合能力、更高的后期光能利用率;全生育期晚粳比晚籼长,主要体现在推迟抽穗结实,延长结实灌浆期;粳稻全生育期积温和光照时数均显著高于籼稻,粳稻后期叶面积指数大于籼稻,光合势亦高于籼稻,而在生育前期(拔节至抽穗期)两者对温光资源的利用基本相当,因此温光利用率晚粳显著高于晚籼;另外,晚粳的稻米品质要优于晚籼。因此,相对于双季晚籼,双季晚粳具有更高的应用推广价值。 相似文献
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2013年晚季沙县种子站引进9个杂交水稻新品种进行生产试验,结果表明,钱优3301、粤两优673、天优1261、谷优2736、乐优3301表现较好,穗数多,穗粒数也较多,生育期适宜,综合性状较好,可进一步扩大示范。 相似文献
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三系法籼粳亚种杂交水稻研究的初步进展 总被引:7,自引:0,他引:7
笔者自1985年开始三系法籼粳亚种间杂交水稻研究工作,至1989年已初步育成了一 批籼粳亚种杂交水稻的早、中、晚稻组合,其穗型大小、结实率和千粒重等,比同熟期的当家常 规稻和品种间杂交稻都有大幅度超出。在轮回422/选10-19组合分离后代中,选育了多种熟期和生态类型的广亲和恢复系。 相似文献
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对10个中稻新品种与对照Ⅱ优明86在大田生产条件下的产量,抗逆性等特征特性进行生产试验,结果表明川优2189、两优616、福两优1586等品种适合中高海拔地区作中稻栽培;广优2186、广优3301、中浙优1号、花2优3301等品种适合高海拔区域作中稻栽培。 相似文献
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扬两优6号是江苏里下河地区农业科学研究所育成的两系杂交中籼品种。2009年引进延平区炉下镇作单晚和烟后稻种植,经3 a试种,表现产量高、米质优、稳产、适应性广的特性,可以在延平区进一步推广种植。总结了其在延平区种植的特征特性和栽培要点。 相似文献
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本文针对华南广东、广西优质杂交稻育种的两个阶段进行了综述。第1个阶段为中等直链淀粉含量优质杂交稻发展阶段,育成了粒型较好、心腹白较少、透明度好的博A、秋A、美A、粤泰A、天丰A、五丰A、荣丰A和吉丰A等8个不育系,并利用其配组育成博优998、天优998、五优308等中等直链淀粉含量的优质杂交稻品种149个通过审定。此外,还利用两系不育系培矮64S配组育成培杂双七、培杂泰丰等9个中等直链淀粉含量的优质两系杂交稻品种通过审定。第2个阶段为低直链淀粉含量的优质杂交稻发展阶段,育成了粤丰A、泰丰A、野香A、广8A、丰田1A等15个优质不育系,并利用其配组育成泰丰优208、野香优莉丝、丰田优553等低直链淀粉含量优质杂交稻品种212个通过审定。同时,利用五山丝苗、粤农丝苗、五山油占等8个高产抗病兼用型优质常规稻作恢复系和优质恢复系华占与丙4114配组育成175个低直链淀粉含量优质杂交稻品种通过审定。从2015年开始,在每年的全国年推广面积前十大品种中,由华南直接育成或利用华南亲本合作育成的杂交稻品种占到一半以上,为我国优质籼稻产业发展发挥了巨大作用。最后还讨论了当前华南优质杂交稻存在问题和今后育... 相似文献
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XU Chunmei YUAN Lilun CHEN Song CHU Guang YE Weifa DING Yuhua WANG Danying ZHANG Xiufu 《中国水稻科学》1986,34(5):457-469
【Objective】Under machine-transplanting conditions, four different types of late rice cultivars with high quality were used to investigate the differences of yield, growth characteristics, utilization of temperature and illumination. The results will lay a theoretical basis for the selection of double-cropping late rice varieties suitable for different ecological regions in the lower reaches of the Yangtze River.【Method】The yield, growth duration, dry matter accumulation, and utilization of temperature and illumination of double-cropping late rice were comparatively studied using four kinds of rice varieties as test materials namely indica conventional rice, indica hybrid rice, japonica conventional rice and Changyou japonica hybrid rice (20 varieties in total, selected between 2016 and 2017, all of which were high-quality rice in the lower reaches of the Yangtze River as double-cropping late rice). The experiment was carried out in two cities, Fuyang, Zhejiang Province (30.05º N, 119.95º E, 17.93 m above sea level) and Lujiang, Anhui Province (31.15º N, 117.16º E, 14 m above sea level).【Result】The yield of the four-types of late rice at high latitude was higher than that at low latitude. The yield of indica conventional rice, indica hybrid rice, japonica conventional rice, and Changyou japonica hybrid rice grown in Lujiang, Anhui Province was 11.1%, 12.9%, 6.6% and 12.4% higher than that in Fuyang, Zhejiang Province. When planted in the same places, Changyou japonica hybrid rice had the highest yield, and conventional indica rice had the lowest. The growth period was longer and dry matter accumulation was higher at high latitudes. When planted at high altitudes, the indica hybrid rice growth duration was the longest (10.4 d), and the increase in dry matter accumulation was the largest in conventional japonica rice (11.93% in full heading stage and 9.44% in mature stage). When planted in the same place, the dry matter accumulation was higher in hybrid rice than conventional rice. There was no significant difference in effective accumulated temperature between the filling stage and the whole growth duration of indica rice, but the sunshine hours, solar radiation, and its utilization rate were significantly higher at high latitudes. The effective accumulated temperature decreased significantly in the filling stage and the whole growth stage of japonica rice, but the change of accumulated sunshine hours was not obvious, while the accumulated solar radiation increased significantly at high latitudes. These were consistent with the changing trend of the utilization rate of the temperature and light resources. When planted at the same latitude, the growth period, dry matter accumulation, temperature and light resource utilization rate of japonica rice were higher than those of indica rice.【Conclusion】Late indica rice could make full use of temperature and light resources in order to improve its yield when planted in Lujiang, Anhui Province, but the difference of the utilization efficiency in the temperature and light resources of late japonica rice was not obvious. The yield of late japonica rice in Lujiang, Anhui Province increased because of the extension of the growth duration and the increase of dry matter accumulation. 相似文献