水稻不同栽插规格对产量性状的影响

试验在安龙县本地水稻适宜栽插密度1.1万穴/667m2的基础上,探讨适宜的栽插规格和配置,设置了14.85cm×39.6cm、18.15cm×33cm、19.8cm×29.7cm、21.45cm×27.72cm、(39.6cm+26.4cm)×18.15cm五个处理的对比试验,结果表明:在宽行窄株栽插方式处理中,以19.8cm×29.7cm规格的产量性状表现最好,单产为889.3kg/667m2,并呈现出随着栽插穴(株)距的减小,单产呈下降的趋势。在相同栽培密度条件下,宽窄行栽插方式(39.6cm+26.4cm)×18.15cml的产量性状最好,单产最高为897.98kg/667m2。     

不同密度对江优919生长及产量的影响

为探讨江优919的适宜栽培密度,开展了不同宽窄行的密度试验。结果表明:江优919栽培密度为12688穴/667m2[(36.6cm+16.5cm*19.8cm)]单产最高,达610.21kg/667m2,此密度植株茎蘖数较多,成穗率和结实率高。拟合产量与密度抛物线y=0.000003x2+0.0721x+13692,栽插密度为12017穴/667m2时单产最高。在生产上建议江优919的栽培密度为12000~13000/667m2。     

江优919与江两优3号机插秧适宜密度研究

江优919与江两优3号为贵州新引进的杂交稻品种,为探索两品种适宜的栽培密度,开展了4个不同密度试验。结果表明:江优919单产比江两优3号单产高17.8kg/667m2,高3.0%。江优919与江两优3号均以12 346穴/667m2(30×18cm)时单产最高。生产上,江优919与江两优3号推荐机插秧密度为12 346穴/667m2(30×18cm)。     

准两优1102适宜栽培密度研究

为探索适宜贵定县的水稻栽插密度,以准两优1102为试验材料,开展了6个不同密度的试验研究。结果表明：生育期与栽插密度无关,有效穗数以3300穴／667m2最多,单产变化依次为13300穴／667m2＞12000穴／667m2＞11000穴／667m2＞14000穴／667m2＞15000穴／667m2＞10000穴／667m2,13300穴／667m2与12000穴／667m2无明显差异,适宜栽培密度为12000～13300穴／667m2。     

不同密度对江优919产量的影响

为摸索江优919适宜的栽培密度,开展了不同宽窄行不同密度试验。结果表明:栽插密度对江优919生育期没影响,与产量影响较大,在栽插密度为10870穴/667m2(宽窄行为36.6cm+16.5cm,株距为23.1cm),水稻各农艺性状表现较好,且能获得最高单产,达662.10kg/667m2。     

杂交水稻不同移栽规格及密度对产量影响的研究

通过对杂交水稻不同移栽规格及密度对产量影响的试验研究,试验结果表明:在移栽密度1.33万窝/667m2条件下,A处理(0.3×0.14)m(每窝插1粒谷秧),单产863.8kg/667m2产量居第1位;其次是D处理(0.23×0.18)m(每窝插1粒谷秧),单产823.4kg/667m2产量居第2位;产量居第3是B处理(0.27×0.15)m(每窝插1粒谷秧),单产820.4kg/667m2;产量居率4位D处理[(0.33+0.17)×0.17]m(每窝插1粒谷秧),单产794.7kg/667m2。在移栽密度0.67万穴/667m2条件下,E处理(0.3×0.27)m(每窝插2粒谷秧),单产734.7kg/667m2居第5位;产量居6位的是F处理[(0.45+0.27)×0.23]m(每窝插2粒谷秧),单产708.0kg/667m2。在白泥大坝水稻移栽密度在1.33万窝/667m2比较适宜,移栽方式以宽行窄株为好。     

水稻丢秧适宜杂交稻品种筛选研究

通过品种比较试验研究表明,7个参试品种,产量表现最好的是黔优88,单产最高770kg/667m2,其次是Y两优5848单产761.1kg/667m2,再次是Q优6号单产755.6kg/667m2。结果表明,在余庆县海拔800m地区,采取旱育厢式丢秧,选用黔优88、Y两优5848、Q优6号品种较为适宜。     

三峡库区杂交稻强化栽培技术研究初报

以杂交稻D优3232为材料,进行了栽插密度及苗数的强化栽培技术研究,结果表明:D优3232采用强化栽培可比常规栽培增产39·9%,平均产量可达826·1kg/667m2;D优3232强化栽培种植规格以40cm×40cm,每穴栽1粒谷苗较为适宜。     

两优363最佳施肥量与栽插株数研究

20 0 2年在贵州省贵阳郊区 ,采用水稻强化栽培体系(SRI)方法 ,在 2 8d较早秧龄、4 0cm× 4 0cm栽插密度和湿润管理的条件下 ,进行了优质两系杂交稻“两优 36 3”不同施肥量和栽插株数的栽培试验。结果表明 :施用氮磷钾复合肥 5 0kg/ 6 6 7m2 ,追肥 3次共尿素 15kg/ 6 6 7m2 ,每穴栽 1株处理的处理产量最高 ,为 4 4 0 4kg/ 6 6 7m2 ;而施用氮磷钾复合肥5 0kg/ 6 6 7m2 ,追肥 2次共尿素 10kg/ 6 6 7m2 ,每穴栽 1株的处理较省工和经济 ,产量也较理想 ,为 4 33 3kg/ 6 6 7m2 。讨论了优质两系杂交稻“两优 36 3”无公害栽培措施。     

杂交稻黔香优302的适宜栽插密度与施肥量试验

2007年在贵阳市郊(海拔1 140 m),对优质杂交香稻黔香优302进行了不同施氮肥量和不同栽插密度的裂区栽培试验。结果表明:在贵阳市郊施蚕豆秆绿肥1 000 kg/667 m2左右作基肥,4月1日播种,秧龄50 d,单株栽插,规格为33.3 cm×19.98cm,基本苗1.0万株/667 m2,施尿素10 kg/667 m2,产量可达到658.13 kg/667 m2。     

冷冻干燥速溶蛋花汤的加工技术

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。     

Measuring of Quantity of Matter-mass and the Measuring of Inertia of Matter-momentclm

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.     

香蕉遗传转化方法研究进展

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。     

酸枣幼根原生质体的制备

以生长6～9 d的酸枣种子幼根为试验材料,0.7 mol·L-1甘露醇作为渗透压稳定剂、pH值5.5～6.0、28℃恒温水浴条件下,以光学显微镜观察的水解总时间、初始产生原生质体的时间、原生质体产量及细胞碎片量为指标,研究通过酶水解来制备酸枣幼根原生质体的方法.结果表明,在含1％果胶酶+4％纤维素酶R-10+3％纤维素...     

壳聚糖对石榴果汁澄清效果的影响

利用壳聚糖的絮凝作用对壳聚糖在甜石榴汁澄清中的应用效果进行了研究,试验结果表明,壳聚糖用量为0.3g/L、澄清时间为60min、温度为35℃时,甜石榴汁透光率可达85%以上,且通过对壳聚糖处理前后可溶性固形物、总酸、VC等营养成分含量的比较,确定以上工艺参数为甜石榴汁澄清的最佳选择。     

南瓜降糖功能及其系列食品加工技术

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。     

Laboratorial Method of Determining Limit of Yielding of Material

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.     

新疆布尔津县土地利用格局特征研究

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。     

母猪繁殖障碍成因分析

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。     

Efficiency of water use of early plantings of sunflower

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.