两系杂交水稻奥两优69高产制种技术

奥两优69是湖南怀化奥谱隆作物育种工程研究所用自选光温敏核不育系奥龙1S与自选优质高配合力恢复系R69配组育成的两系迟熟杂交中籼新组合.2007-2008年在湖南怀化芷江、靖州等地制种167.5 hm2,平均产量3.6 t/hm2,最高产量4.2 t/hm2.介绍了奥两优69双亲的特征特性,结合湖南怀化制种实践,总结了其高产制种技术.     

富锦市水稻两段育苗技术的应用效果

采用两段育苗秧苗素质好,带蘖率100%,物候期提前,提早成熟2～3d,产量平均为10509.6kg/hm2,比对照高3729.7kg/hm2。并简要阐述了两段育苗的栽培技术要点。     

头季不同氮肥施用量对再生稻两优616干物质生产及产量的影响

研究以超级稻两优616为材料,设置头季4种不同施氮水平处理,即N0(对照,不施氮肥)、低氮N1(112.5 kg/hm2)、中氮N2(150 kg/hm2)和高氮N3(225 kg/hm2),研究两优616作再生稻干物质积累及转运规律、产量及其构成因素.结果表明:在0～225 kg/hm2氮肥用量范围内,两优616头季...     

两系超级杂交稻Y两优1号母本直播制种技术

2008和2009年连续2a在湖南绥宁县武阳制种基地进行两系超级杂交水稻Y两优1号(Y58S/9311)母本直播制种14hm2,平均单产2.93t/hm2,最高单产4.2t/hm2,种子纯度99%以上。提出了该组合母本直播制种优质高产的配套技术。     

两系超级杂交稻两优0293在上海高产示范栽培技术

两优0293是国家杂交水稻工程技术研究中心选配的两系超级杂交稻组合,2006年在上海市松江区泖港镇科技农场示范种植8.51 hm2,理论产量为13.37 t/hm2,经专家现场验收,实割验收产量为10.81 t/hm2(因故提前验收)。从低龄稀植促早发、湿润灌溉促壮秆、精确施肥促大穗、抓好病虫防治保丰收等方面介绍了该组合在上海地区的高产栽培技术。     

两系杂交中籼稻徽两优6号母本抛秧高产制种技术

2009年在安徽巢湖制种基地进行两系杂交水稻徽两优6号(1892S/扬稻6号变异株)母本抛秧制种20hm2,平均单产2.96 t/hm2,最高单产3.65 t/hm2,种子纯度99%以上.提出了该组合母本抛秧制种优质高产的配套技术.     

两系超级杂交水稻新组合Y两优1号优质高产制种技术

2005年在湖南绥宁县武阳制种基地试制两系超级杂交水稻Y两优1号(Y58S/9311)0.78 hm2,平均单产2.97 t/hm2,最高单产3.46 t/hm2,种子纯度在99%以上。初步掌握了其双亲的特征特性,提出了优质保纯高产制种的相应技术措施。     

Y两优2号在孝感作再生稻栽培表现及高产栽培技术

用Y两优2号在孝感市作再生稻栽培,头季稻实收产量9.64 t/hm2,再生稻实收产量4.15 t/hm2,2季实收总产量13.79t/hm2,比示范区周边的一季粳稻产量增加5.69 t/hm2,产值增加14 800.5元/hm2,纯收入增加6 663.0元/hm2。提出了相应的高产栽培技术。     

优质两系杂交稻65002及其高产栽培技术

一、650 0 2在生产上的表现650 0 2是江苏省农科院以培矮 64S×扬稻 6号(9 31 1 )配组而成的两系杂交中熟中籼新组合 ,1 999年经江苏省品种审定委员会审定通过 ,定名“两优培九”。河南省南部稻区经 1 997～ 1 999年连续 3年引种示范和大面积推广 ,均表现出杂种优势强、高产稳产、抗逆性强、适应范围广、米质优等特点。1 999年信阳市种植 670 0 hm2 ,平均单产 9750 kg/ hm2 ,较汕优63增产 1 5% ,其中 7个 66.7hm2 丰产方平均单产1 0 2 75 kg/ hm2 ,1 0个 6.7hm2高产方单产达 1 1 0 0 0kg/ hm2 ,其中新县 6.7hm2 单产突破 1 2 0 0 0 kg/ hm2…     

高产优质两系杂交水稻新组合Y两优5867制种技术

2011年江西科源种业在江西进行了500 hm2 Y两优5867制种生产,平均单产达2.1 t/hm2,最高单产3.3 t/hm2.结合父母本特征特性,总结了该组合在江西高产制种技术措施.     

早熟丰产机采棉花品种——新石K26

主要介绍新石K26的选育过程、生物学特性、产量、纤维品质、抗病性及栽培技术要点。     

长江流域棉花轻简高效种植技术探讨

长江流域棉区是中国三大主要产棉区之一。近年来,受劳动力成本上升,棉花用工繁多、比较效益下降,以及生产中机械化、信息化程度低等因素影响,当地棉花种植面积急剧萎缩。为改变现状,从棉花品种、轻简化机械化管理技术、绿色高效栽培技术以及现代农业信息化智能化技术等方面进行了分析,探讨了长江流域棉花轻简高效种植技术措施及研究方向,为长江流域棉花产业持续发展提供参考。     

Effects of application of nitrogen fertilizer on concentrations of P, K, S, Ca, Mg, Na, Cl, Mn, Fe, Cu and Zn in perennial ryegrass/white clover pastures in south-western Victoria, Australia

Effects of timing and rate of N fertilizer application on concentrations of P, K, S, Ca, Mg, Na, Cl, Mn, Fe, Cu and Zn in herbage from perennial ryegrass/white clover pastures were studied at two sites in south-western Victoria, Australia. Nitrogen fertilizer (0, 15, 25, 30, 45 and 60 kg ha^–1) was applied as urea in mid-April, early May, mid-May, early June and mid-June 1996 to pastures grazed by dairy cows. At Site 1, N fertilizer resulted in a linear increase in P, K, S, Mg and Cl concentrations in herbage and a linear decrease in Ca concentration. For all times of application, concentrations of P, K, Ca, Mg and Cl in herbage increased by 0·0048, 0·08, −0·010, 0·0013 and 0·053 g kg^–1 dry matter (DM) per kg N applied respectively. For S concentration, maximum responses occurred in mid-May (0·012 g kg^–1 DM per kg N applied). At Site 2, N fertilizer resulted in a linear increase in P, S and Na concentrations in herbage, a linear decrease in Ca concentration and a curvilinear increase in K and Cl concentration. The maximum responses for P, S and K concentrations in herbage occurred for the N application in mid-June and were 0·015, 0·008 and 0·47 g kg^–1 DM per kg N applied respectively. For Cl concentration, the maximum response occurred for the N application in early June and was 0·225 g kg^–1 DM per kg N applied. Overall, applications of N fertilizer up to 60 kg ha^–1 did not alter herbage mineral concentration to levels that might affect pasture growth or animal health.     

Characterization of starches of proso,foxtail, barnyard,kodo, and little millets

Scanning electron microscope (SEM) pictures of small millet starch granules showed more large polygonal and few small spherical or polygonal granules. The granules of small millets resembled those of rice starch granules. The size of the starch granules ranged from 0.8–10 m. The size of the granules was larger in barnyard millet and smaller in proso millet. Several granules showed deep indentation caused by protein bodies. SEM of starch isolated from 24 hour-germinated kodo millet showed pitting or pinholes at some points due to the attack of amylases (preferentially on bigger granules). Brabender viscoamylograph studies on small millet starches revealed that the gelatinization temperatures ranged from 75.8 to 84.9 ^° C. Barnyard millet possessed lower amylograph viscosity, minimum breakdown, and relative breakdown values when compared to the other small millets.