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本试验以新春6号为对照,对11个春小麦新品系进行了品种比较试验。结果表明,参试品(种)系与对照相比,株高得到降低,成穗率、穗长、结实小穗数、主穗粒数、主穗粒重得到提高,不孕小穗数得到减少;各性状的变异系数大小排序为:不育小穗数>总茎数>成穗率>主穗粒重>基本苗>主穗粒数>千粒重>收获穗数>穗长>株高>结实小穗数>生育期。新品系2002-59、LX-49、2005-15分别比对照新春6号增产5.47%、2.13%和1.07%,其增产因素是千粒重、主穗粒数、粒数和粒重比对照显著提高。 相似文献
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《种子科技》2014,(10):53-54
Y两优2号
审定编号:国审稻2013027选育单位:湖南杂交水稻研究中心品种来源:Y58S×远恢2号
特征特性:籼型两系杂交水稻品种。在长江中下游作一季中稻种植,全生育期平均139.1 d,比对照丰两优4号长2.2 d。株高为122.6 cm,穗长28.3 cm,每667 m2有效穗数17.1万穗,每穗总粒数198.5粒,结实率78.9%,千粒重24.8 g。抗性:稻瘟病综合指数5.5级,穗瘟损失率最高级9级;白叶枯病7级;褐飞虱9级;高感稻瘟病、褐飞虱,感白叶枯病。米质主要指标:整精米率64.7%,长宽比3.0,垩白粒率28%,垩白度3.6%,胶稠度84 mm,直链淀粉含量15.5%,达到国家《优质稻谷》标准3级。 相似文献
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氮肥不同施用量对免耕抛秧晚稻产量的影响 总被引:1,自引:0,他引:1
通过试验表明免耕抛秧晚稻(品种:岳优华4)施N量以11.5kg/667m2比较适宜,其群体结构、综合指标比较理想,单产居首位。比施8.5kg/667m2处理增产达8.0%,增产达极显著水平;比多施1.5kg氮素的处理增产4.71%。够苗期和峰苗期的苗数随着施氮量的增加而增加。对穗粒结构的影响,在施氮8.5~11.5kg时,其有效穗数、成穗率和穗实粒数均随着施氮量的增加而增加;但施氮达13kg时,其有效穗数、成穗率和穗实粒数反而下降。结实率,随着施氮量的增加而下降,呈负相关。 相似文献
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水稻灿粳亚种间杂交后代的产量构成因素与产量的相关分析 总被引:1,自引:0,他引:1
本文通过对灿粳稻亚种间远缘杂交后代品系单位面积穗数、穗实粒数、千粒重与产量的研究分析表明:要获得高产,在稳定每单位面积穗数的基础上,在选育和栽培过程中,注意选育千粒重高、穗实粒数高的后代是取得成功的关键。 相似文献
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新型斐特有机肥在小麦上的应用效果研究 总被引:1,自引:0,他引:1
研究表明:各试验处理的产量差异较大。(1)浇水条件下施25kg/667m2生物肥+2/3传统施肥的产量最高,为345.3kg/667m2,较对照增产6.5%,达显著水平,其成产三因素较为协调。(2)不浇水条件下施25kg/667m2生物肥+2/3传统施肥的产量最高,为338.5kg/667m2,较对照增产5.9%,达显著水平,其穗数为45.4万/667m2,穗粒数为24.9个/穗,千粒重较大,为36.9g,成产结构较为协调。(3)浇水处理的株高、穗长和小穗数明显高于不浇水处理,不孕小穗数差异不明显。处理W6和W5,5和6的株高、不孕小穗数较其它处理低,小穗数个数较其它处理高,穗长差异不明显。浇水处理利于冬小麦生长。 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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基于RS与GIS技术,利用景观生态学理论及景观格局指数对布尔津县土地利用现状进行定量分析。结果显示为:(1)布尔津县以草地、林地为主要景观类型,镶嵌着耕地、水域等景观类型。(2)四个分区(即高山区、丘陵区、平原区、荒漠区)的林地资源组成差异明显,耕地、居民、交通及工矿用地集中分布在丘陵区和平原区(3)从各项指数来看,高山区的多样性指数较低;平原区是受人文因素最多的区域,景观优势度低,各种土地利用类型比例差异不大,有利于生态可持续发展,但要合理的开发利用;荒漠区生态环境相对脆弱,要加强生态环境的保护与改善。通过该研究对布尔津县的土地利用现状作一个了解,为该县乃至整个地区的景观规划和可持续发展战略提供科学依据。 相似文献
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Based on the relation between the incipient yield pressure and the limit of yielding in cylinder according to the elastic disabled rule, a laboratorial method of determining limit of yielding of material is designed and a set of experimental data were gained by the method. The incipient yield pressure of the cylinder is gained by analyzing the experimental data, and then the limit of yielding is gained. The laboratorial method has a good reliability as the experimental value has a little error to the theory value. It has a definite engineering signification and theory value to research the mechanical capability of material and the disabled rule of high pressure vessel. 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引:3,自引:0,他引:3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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母猪繁殖障碍成因分析 总被引:3,自引:0,他引:3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素(如饲养水平、饲料品质、断奶日龄)、环境因素(如温度、湿度、通风、光照)、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
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Efficiency of water use of early plantings of sunflower 总被引:4,自引:0,他引:4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献