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龙联1号是以龙粳2号/空育131配组方式经系统培育选择而成。2009年成为黑龙江省农业良种化工1程中标品种,2010年审定推广。通过高产栽培,在生产中表现出丰产、出米率高、抗稻瘟病性强、耐寒性强等优点。 相似文献
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在特殊气候的早秋低温年,对空育131、龙育91-061、垦94-202、垦94-18、上育418、垦稻8号几个品种产量性状进行了研究,结果表明:空育131插期在5月1日~5月10日的空秕率较低,穗粒数、结实率和产量较高;相同插期的上述品种间结实率差异较大,产量差异也大,以空育131、上育418抗逆性最强,产量最高。 相似文献
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为满足市场对优质米的需求,对黑龙江省第三积温带下限地区种植的空育131等10个主要品种进行了筛选,结果表明:在严重低温冷害环境下,垦稻9号产量最高,达7008kg/hm2;空育131次之,达6471kg/hm2;其他品种都在5 100kg/hm2以下。结合米质分析,空育131可作为第三积温带下限地区的主栽品种.垦稻9号可作为搭配品种。同时,指出由于低温冷害导致谷粒空秕率增高是造成减产的主要原因。 相似文献
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为促进优质食味粳稻品种在江苏淮北地区的推广应用,于2019年引进17个优质食味粳稻品种,以徐稻9号为对照,从生育期、抗逆性、丰产性、品质等方面进行综合评价。结果表明,供试的17个品种均能在安全齐穗期内齐穗(该地区安全齐穗期为9月15日前),生育期均处于安全期范围内。比对照增产的品种有7个,其中瑞华1903产量最高,达10888.5 kg/hm^2;圣稻022生育期最短,仅131 d;南粳518株高最矮,为95.7 cm。品质测定结果显示,武运粳1706整精米率和直连淀粉含量最高,分别达75.0%和16.2%;南粳5718、南粳518、南粳2728直链淀粉含量在10.0%左右,为优良食味粳稻品种。通过产量水平、农艺性状、生育期和品质等综合分析认为,供试品种中南粳518、南粳2728丰产性较好、株高较矮,且均为优良食味品种,生产中不仅产量潜力高、米质较优,同时早熟能有效规避低温危害和缓解淮北地区稻麦茬口季节紧张矛盾,适合淮北中熟中粳稻区人工栽插、机插和直播条件下大面积推广应用。 相似文献
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Summary Diploid parents with some resistance to PLRV, were intercrossed to give 3 families with 191 clones which were evaluated for
reaction to PLRV and yielding ability. After inoculation with PLRV the clones could be separated into those: 1) resistant,
2) susceptible, 3) intolerant, reacting with low virus concentration, 4) tolerant and 5) intermediate in reaction. Both the
ELISA test and the evaluation of external disease symptoms were necessary to separate the clones. No correlation was found
between resistance to PLRV and tuber yielding ability. 相似文献
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为了提高橡胶树的抗灾能力,从1979年起在海南岛中部属偶发性重风微寒区的黎母岭山区,开展了组配抗逆高产的橡胶三合树的研究。经九年验证,选配出的GTI/PR107组合品系1—4割年平均亩产干胶51.6公斤,为对照无性系PR107的129%,开割率达83.2%,保存率达96.2%,已被评定为小规模推广等级;组配的GT1/RRIM600、GT1/RRIM623、GT1/PB/63、大岭485/RRIM600和大丰359/GT1等具有抗逆高产性状,是有希望的组合品系。 相似文献
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I. Rhodfis 《Grass and Forage Science》1968,23(4):330-335
Two experiments were set up in a semi-controlled glasshouse environment to determine the nature of the competitive stress, and the characters associated with competitive ability, during the seedling growth of some grass species. Over a period from sowing until the attainment of a relatively stable tiller population root competition was almost entirely responsible for the suppression of Festuca arundinacea in association with H1 ryegrass at two densities. In contrast, root and shoot competition were of equal importance in bringing about the suppression of Phalaris coerulescens in association with H1 ryegrass, an effect which only occurred at the high density.
Differences in the patterns of root growth of the species and populations are discussed in relation to differences in their competitive abilities.
It is suggested that the rate and extent of nodal root production are closely associated with seedling competitive ability. 相似文献
Differences in the patterns of root growth of the species and populations are discussed in relation to differences in their competitive abilities.
It is suggested that the rate and extent of nodal root production are closely associated with seedling competitive ability. 相似文献
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