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在黔北山区边陲,经2005年、2006年引进脱毒甘薯I号进行小区试验和大面积繁种示范,结果表明,脱毒甘薯I号是需钾量大的作物,在配施N8kg/667m2、P2O55kg/667m2/kg情况下,以施K2O16kg/667m2获得产量最佳;繁种高产栽培处理产量达2145.8kg/667m2,比常规繁种栽培增产733.6kg/667m2,增幅51.9%,增收176.10元/667m2。两年繁种高产栽培示范面积821.4hm2,,累计收脱毒甘薯I号薯种2159.8549万kg,平均单产1753.0kg/667m2,增收合格薯种903.8686万kg,项目共增收91.1138万元,效益显著。结合取得的试验研究结果和大面积繁种高产栽培示范经验,总结提出了脱毒甘薯I号繁种高产规范化栽培技术,此略。 相似文献
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野生稻资源安全保存技术 总被引:1,自引:1,他引:1
本文介绍了野生稻资源大规模的种茎资源,种子资源的保存技术和组织培养与冷低温相结合的试验管微型种质库保存技术。为野生稻资源大规模长期安全保存,提供了可行的技术方法。 相似文献
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花生夏播繁种高产栽培技术 总被引:2,自引:0,他引:2
用春播花生作种,往往缺苗多、苗弱、病多.而以夏播花生作种,相对发芽率高,幼苗长势强,易获得高产.在栽培上采取调整播期、改良播种方式和加强病虫防治等措施,可获得较高的产量. 相似文献
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1选择良种,适期早播
机械旱直播种繁水稻应选择耐肥抗倒,后期耐寒性较强,保证安全齐穗,穗瘟发生轻,穗粒并重型,优质高产的中熟中粳水稻良种作为繁殖对象为宜.如武育粳3号、镇稻88等.麦茬机械旱直播种繁水稻的播期虽然比移栽种繁水稻推迟25d左右,但是抽穗成熟期仅推迟6~7d.麦茬机械旱直播种繁水稻播期要越早越好,最迟在6月上旬播种结束. 相似文献
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花培创造的水稻新种质 总被引:3,自引:0,他引:3
种质资源在品种遗传改良、生物技术等研究中具有重要意义.我们以丰富的同源四倍体水稻种质资源为材料,同源四倍体水稻具有4个相同的染色体组,同源四倍体一位点上有4个等位基因,在四倍体的情况下,隐性突变往往得不到表现而被掩盖起来,但通过四倍体水稻花药培养的减倍,可以得到具有隐性突变的二倍体杂合体,在花粉植株F2中可使隐性突变性状得以表达,在花药植株后代中,寻找和发现具有特殊性状又有较大利用价值的新种质.通过几年的工作,我们陆续获得了如下新种质. 相似文献
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水稻生态化种植高产栽培技术 总被引:1,自引:0,他引:1
水稻种植在农业生产中具有举足轻重的作用。做好粮食安全生态化生产,对于我国水稻种植再上新台阶具有重要现实意义和历史意义。从基地的生态环境条件要求、水稻获得高产的合理种植密度、田间的平衡施肥管理、病虫害和杂草的综合生态防治、优良品种的选择和培育壮秧等方面,分析了水稻生态化种植的高产栽培技术。 相似文献
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<正>糯优918是贵州省遵义市百隆源农业科学研究所用不育系糯229A与恢复系糯恢918组配选育而成的一个杂交糯稻新品种,2015年通过贵州省农作物品种审定委员会审定,审定编号:黔审稻2015008号。1主要特征特性在贵州省遵义县三合镇种植生育期161d,株高116cm,每667m~2有效穗数14.5万,穗长24.9cm,每穗 相似文献
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Choosing rice germplasm for evaluation 总被引:2,自引:0,他引:2
Duncan A. Vaughan 《Euphytica》1991,54(2):147-154
Summary Using the evaluation database on the world collection of rice, Oryza sativa, conserved at the International Rice Research Institute, different sampling strategies for choosing germplasm were compared. Random, stratified, sequential and analysed sets of germplasm were chosen and the frequency of finding resistance to different rice pests, the brown planthopper, green leafhopper and whitebacked planthopper, and diseases, bacterial blight and blast were compared. The frequency of the geographically restricted javanica race of rice was also compared in the different germplasm sets. The results indicate that where no prior information is available to choose germplasm for evaluation, for the same sample number, germplasm representing broad genetic diversity are preferable to other sampling strategies. 相似文献
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Summary Sorghum [Sorghum bicolor (L.) Moench] backcross populations containing 3 to 50% wild germplasm were evaluated in south central India for grain yield and nine related traits. No individual BC0F2- to BC2F2-derived lines were high transgressive segregates for grain yield. Only 1.5% of all BC3F2- or BC4F2-derived lines were transgressive segragates, with 26% higher mean grain yield than their respective recurrent parents. The ten highest-yielding BC2F2- to BC4F2-derived lines per mating having parent CK60B yielded an average of 14% more than CK60B, which was, at the 5% level, a statistically significant difference. However, the increased yield was associated with increased plant height. The highest-yilding lines from RS/R/A2725 x virgatum and RS/R/A2725 x verticilliflorum were an average of 13.5% higher-yielding than RS/R/A2725 (a significant difference) and were equal in plant height. Selection increased BC2 mean grain yields by 6 to 27%. Population mean yield, mean yield of selected lines, and frequency of high-yielding lines were highest in the BC4.Journal paper no. 380, ICRISAT, Patancheru, India; Journal paper no. J-11114, Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa, USA. 相似文献