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以我国南方原主栽籼糯稻品种旱糯7l7为对照.研究了国家审定的现行主栽高产籼糯稻品种鄂荆糯6号和闽岩糯的库、源、流形态特性。结果表明.鄂荆糯6号库容量大,填库能力较低,冠层叶较挺直。叶面积指数大.干物质积累总量多.茎鞘叶物质在齐穗后向穗部转运量大.但后期光合生产量较低,从而导致库虽大但源不足;闽岩糯库容量较大.填库能力强.冠层叶挺直.比叶重高.叶面积指数较小,但黄熟期仍有较大的绿叶面积,粒叶比高.虽然干物质积累总量较少.但干物质生产、转化效率高.库、源、流协调。 相似文献
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高产籼糯与高产籼稻品种性状之比较 总被引:1,自引:0,他引:1
以超高产籼稻"满仓515"为对照,对"鄂荆糯6号"、"闽岩糯"、"越糯3号"3个常规高产籼糯品种的生物学特性、干物质积累与转运、产量及其构成进行了比较研究。结果表明,虽然这3个籼糯品种的穗数比"满仓515"多28.3%~56.3%,但总颖花数和库容量分别比"满仓515"少7.7%~20.6%和14.8%~30.4%,最终产量水平比"满仓515"低15.4%~22.1%。说明常规高产籼糯品种每穗粒数少和生物产量低是其产量较高产籼稻品种低的主要原因。 相似文献
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越糯6号是浙江省绍兴市农科所以本所中间材料越糯96-10与嘉兴农科院新品系Z9505杂交配组选育而成的常规早籼糯新品种。2004年4月通过浙江省农作物品种审定委员会审定。该品种适宜于长江中下游地区作早季搭配种植,目前已在浙、赣、鄂、闽等省累计示范面积达2万公顷以上。 相似文献
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<正> 荆糯6号系湖北省荆州地区农科所稻作研究室辐射育种组,于1981年用钴60γ射线3.5万伦琴辐射处理“桂朝2号”干种子,而后筛选米粒突变,加大选育群体,人工病圃鉴定,海南和温室加代,经四年六代连续选择,于1984年育成定型的中熟籼型糯稻新品种。在湖北省、河南省南部稻区及全国南方稻区水稻中籼良种区试中,表现特别优异。 相似文献
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介绍了越糯6号的特征特性,其中偏迟熟,丰产性好,株型紧凑,分蘖中等,较耐肥抗倒,中抗稻瘟病和白叶枯病,米质优良,可以用于酿制黄酒。并介绍了越糯6号的抛秧栽培技术。 相似文献
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台糯1号是台州市农科所和宁波市种子公司合作用86-426/丙665///91-158//甲农糯/85-79复交选育而成的糯稻新品种。表现为高产、稳产,株型紧凑,茎秆坚韧,耐肥抗倒,分蘖中等,熟色好,生育期适中,商品性好,中抗稻瘟病和白叶枯病等特点。 相似文献
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以汕优63为对照,进行了丰优香占4种栽插密度处理和4种施氮量处理的生长分析.结果显示:与汕优63相比,丰优香占在不同栽插密度和不同施氮条件下,成熟期总干物重高、齐穗至成熟生产的净光合产物多、增产显著,表明丰优香占具有稻谷高产的物质基础,对栽插密度和施氮量适应范围宽.丰优香占在不同密度、不同施氮量试验中,以密度30万穴/hm2、施氮量187.5 kg/hm2的处理产量最高,齐穗至成熟生产的净光合产物、成熟期叶面积指数、齐穗后25 d剑叶叶绿素含量和剑叶的光合速率等指标也有相同趋势. 相似文献
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Identification and characterization of yield limiting factors based on multi-year yield maps is important for delineating field management zones. Multi-year yield maps were derived from satellite images of a paddy-rice (Oryza sativa L.) study site with a conventional two-cropping system in central Taiwan. Spatiotemporal yield-trend maps with consistently high, average and low yields, and inconsistent yield areas were delineated based on temporal variation and the means of the normalized yields on a per pixel basis. Soil and plant samples were collected and grouped for statistical analysis based on the derived yield-trend maps. Comparison of soil properties and rice yield components among yield classes indicated that differences in leaching loss of basal and top-dressed N fertilizers were the likely limiting factor affecting the spatial variation of yield within the study site. 相似文献
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Growth characteristics and grain yield of machine-transplanted medium indica hybrid rice with high daily yield 下载免费PDF全文
DENG Fei HE Lian-hua CHEN Duo ZHANG Chi TIAN Qing-lan WU Zhen-yuan LI Qiu-ping ZENG Yu-ling ZHONG Xiao-yuan CHEN Hong WANG Li REN Wan-jun 《农业科学学报》2022,21(9):2547-2558
High-yield rice varieties with a suitable growth duration are required for mechanical transplanting in multiple cropping systems. Daily yield is an appropriate criterion for the selection of machine-transplanted rice varieties. The aim of this study was to investigate the growth characteristics and grain production in machine-transplanted medium indica hybrid rice with a high daily yield. We conducted a field experiment on 20 medium indica hybrid rice varieties in 2017 and 2018.Grain yield decre... 相似文献