共查询到20条相似文献，搜索用时 62 毫秒
1.
2.
3.
4.
为加速鲜食糯玉米新品种的推广应用,笔者于2009年春对浙江省东阳玉米研究所玉米试验站提供的鲜食糯玉米新品种进行了比较试验,结果表明:"浙凤糯2号"、"浙糯玉4号"、"美玉(加甜糯)8号"、"苏科花糯2008"和"苏玉糯2号"5个品种均较适宜原南江区种植,尤以"苏玉糯2号"为较理想的推广品种。 相似文献
5.
6.
7.
贵糯558是贵州大学农学院选育的适宜鲜食和深加工综合利用的优良糯玉米杂交种,2007年9月通过贵州省品种审定委员会审定。在2005-2006年贵州省鲜食玉米杂交种区试中,两年区试平均脱皮鲜果穗产量为13 483.5kg/hm2,比对照筑糯2号平均增产16.0%,两年12个点次中,11增1减,其中5个点次居第1位,增产点数占总试点数的91.7%。贵糯558粗淀粉含量达68.95%,支链淀粉占总淀粉含量的99.39%,粗蛋白质11.71%,赖氨酸0.33%,色氨酸0.06%,感观和蒸煮品质现场鉴评综合评分77.5(达二级标准);品种种子顶土能力强,幼苗生长健壮,综合抗性好,高产稳产,适应性广,外观商品性好,品质优良,适宜在贵州及邻近省市和东南沿海各地中上等肥力土壤上种植。 相似文献
8.
9.
高产优质多抗糯玉米杂交种贵糯7号的选育 总被引：1，自引：1，他引：0
贵糯7号是贵州大学农学院选育的高产优质多抗糯玉米杂交种。在2004~2005年贵州省鲜食玉米杂交种区试中,两年区试平均脱皮鲜果穗产量13 444.5 kg/hm2,比对照筑糯2号平均增产10.3%,两年12个点次中,11增1减,其中6个点次是第一位,增产点数占总试点数的91.7%。贵糯7号粗淀粉含量为64.16%,支链淀粉占总淀粉的含量为100%,粗蛋白质10.16%,赖氨酸0.20%,色氨酸0.11%,感观和蒸煮品质鉴评综合评分79.7(达二级标准),居参试组合第2位。该品种种子顶土能力强,幼苗生长健壮,综合抗性好,高产稳产,适应性广;外观品质、气味、色泽好;糯性、甜度、风味、柔嫩性佳,皮较薄,品质优良。2006年6月已通过贵州省品种审定委员会审定。 相似文献
10.
11.
本试验以菜豆品种先行者为试材,采用32孔、50孔两种规格穴盘,设置10、15、20、25 d等4个苗龄段,通过研究不同穴盘规格和苗龄对菜豆性状及产量的影响,筛选出适合菜豆育苗的穴盘规格和适宜的苗龄。结果表明：穴盘育苗的营养面积增大,菜豆产量随之增加,25 d苗龄条件下,32孔穴盘的前期产量和总产量均显著高于50孔穴盘;随着苗龄的增长,菜豆的前期产量和总产量呈增加趋势,其中25 d苗龄的产量显著高于其他苗龄。综合上述各项指标,菜豆育苗阶段,10 d苗龄可选用32孔、50孔穴盘,15 d以上秧苗选用32孔穴盘为宜。 相似文献
12.
氮素作为重要的营养元素,限制着小麦的生长发育和经济产量,筛选和培育耐低氮小麦品种是提高氮素利用率、降低生产成本的有效途径。以118份不同基因型小麦为材料,在低氮(0.1 mmol·L-1)和正常氮(5 mmol·L-1)条件下苗期水培,测定根干重、茎叶干重、根冠比、植株干重、最大根长、初生根数和二级初生根数等相关指标,采用模糊隶属函数法、主成分分析以及聚类分析法综合评价小麦品种的耐低氮性。结果表明,在低氮胁迫下小麦幼苗的根干重、根冠比和初生根数目显著提高,茎叶干重、植株干重和最大根长不同程度的降低,7个苗期性状指标在两个氮水平下均存在显著性差异。主成分分析提取3个主成分,贡献率分别为 43.575%、22.904%和17.873%,累积贡献率达 84.351%。以耐低氮性综合评价D值进行聚类分析,将118份小麦品种划分为强耐低氮型、耐低氮型、中间型、较敏感型和敏感型5类。筛选出3份耐低氮型小麦（齐大195、金丰7183和天民198）和2份强耐低氮型小麦（山农0917和鲁麦8号）。不同小麦品种的耐低氮机制不同,研究结果为小麦耐低氮品种的选育提供理论依据和材料基础。 相似文献
13.
14.
15.
16.
ICP-OES法同时测定果蔬中铅、砷、镉、铬、铜、锡含量 总被引：2，自引：0，他引：2
果蔬样品经混酸消化后,控制一定的酸度,定容后应用等离子体发射光谱法(ICP-OES)对果蔬中铅、砷、镉、铬、铜、锡六种有害重金属进行测定,研究了分析测定条件,方法简单快速。测定结果表明,五种元素的加标平均回收率在91.0%~107%之间。其RSD均小于3.5%。按该方法进行处理及测定铅、砷、镉、铬、铜、锡,在选择的测定条件下最低检出限分别为0.0006 mg/kg、0.0003 mg/kg、0.00003 mg/kg、0.00005 mg/kg、0.00003 mg/kg、0.0006 mg/kg。 相似文献
17.
Segregation of form, color, movement, and depth: anatomy, physiology, and perception 总被引：63，自引：0，他引：63
Anatomical and physiological observations in monkeys indicate that the primate visual system consists of several separate and independent subdivisions that analyze different aspects of the same retinal image: cells in cortical visual areas 1 and 2 and higher visual areas are segregated into three interdigitating subdivisions that differ in their selectivity for color, stereopsis, movement, and orientation. The pathways selective for form and color seem to be derived mainly from the parvocellular geniculate subdivisions, the depth- and movement-selective components from the magnocellular. At lower levels, in the retina and in the geniculate, cells in these two subdivisions differ in their color selectivity, contrast sensitivity, temporal properties, and spatial resolution. These major differences in the properties of cells at lower levels in each of the subdivisions led to the prediction that different visual functions, such as color, depth, movement, and form perception, should exhibit corresponding differences. Human perceptual experiments are remarkably consistent with these predictions. Moreover, perceptual experiments can be designed to ask which subdivisions of the system are responsible for particular visual abilities, such as figure/ground discrimination or perception of depth from perspective or relative movement--functions that might be difficult to deduce from single-cell response properties. 相似文献
18.
19.
Zhang M Fang S Zakhidov AA Lee SB Aliev AE Williams CD Atkinson KR Baughman RH 《Science (New York, N.Y.)》2005,309(5738):1215-1219
Individual carbon nanotubes are like minute bits of string, and many trillions of these invisible strings must be assembled to make useful macroscopic articles. We demonstrated such assembly at rates above 7 meters per minute by cooperatively rotating carbon nanotubes in vertically oriented nanotube arrays (forests) and made 5-centimeter-wide, meter-long transparent sheets. These self-supporting nanotube sheets are initially formed as a highly anisotropic electronically conducting aerogel that can be densified into strong sheets that are as thin as 50 nanometers. The measured gravimetric strength of orthogonally oriented sheet arrays exceeds that of sheets of high-strength steel. These nanotube sheets have been used in laboratory demonstrations for the microwave bonding of plastics and for making transparent, highly elastomeric electrodes; planar sources of polarized broad-band radiation; conducting appliqués; and flexible organic light-emitting diodes. 相似文献
20.