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１．吉粳７８号 由吉林吉农水稻高新科技发展有限责任公司育成的中晚熟水稻品种。全生育期１３８天,株高９５～１００ｃｍ,株型紧凑,分蘖力强,穗均粒数１００粒左右,千粒重２５．５ｇ。中抗苗瘟和叶瘟,感穗瘟。１９９８～２０００三年区试平均单产５９０．２ ｋｇ／６６７ｍ２,比对照农大 ３号增产 ４．９％;１９９９～２０００年两年生产试验平均单产 ５４４．４ ｋｇ／６６７ ｍ２,比对照增产２．０％。适宜无霜期１４０天左右的中晚熟稻区种植。 ２．组培２８ 由吉林吉农水稻高新科技发展有限责任公司育成。全生育期１３５天,… 相似文献
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１.金优９７４由湖南省衡阳市农业科学研究所育成、江西省种子管理站引进。全生育期１１４天。株高８１ｃｍ ,结实率７５ % ,千粒重２５ｇ。对稻瘟病抗性一般。大田一般单产４２０ｋｇ／６６７ｍ２。适宜赣中、赣北地区种植。２.国丰一号由中国水稻研究所育成、江西省种子管理站引进。全生育期１２３天。株高９９ｃｍ ,分蘖力中等 ,结实率７８．８ % ,千粒重２７．５ｇ。稻瘟病抗性 :苗瘟０级 ,穗颈瘟３级。１９９８～１９９９年参加江西省水稻区试 ,１９９８年平均单产４５４．９２ｋｇ／６６７ｍ２,与对照汕优晚３平产 ;１９９９年平均单… 相似文献
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嘉早０８是嘉兴市农科院选育的早籼稻 ,茎秆粗壮 ,穗型大 ,产量高 ,米质较优。经浙江省１９９９年和２０００年两年区试 ,平均单产为４４８．２８ｋｇ／６６７ｍ２ ,比对照浙７３３增产５．８８% ,两年增产均达极显著水平。２０００年省生产试验平均单产４７４．７ｋｇ／６６７ｍ２,比浙７３３增产８．４３ %。两年区试结果 :平均全生育期１１２．８天 ,比浙７３３长１．３天。平均每６６７ｍ２有效穗为２２万 ,每穗总粒数１３４．８粒、实粒数１０７．８粒 ,结实率８０% ,千粒重２５．５ｇ。抗性鉴定结果 :中抗稻瘟病 ,中感白叶枯病 ,感白… 相似文献
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水晶２号株高１０１．５ｃｍ,分蘖中等 ,株形紧凑 ,穗长 ,着粒密度较稀。平均穗长１９．４ｃｍ ,每穗总粒１０３．３粒 ,实粒９７粒 ,结实率９３．７%。产量高 ,１９９９年 ,松江区种子公司组织区试 ,佘山点单产５９５．４ｋｇ／６６７ｍ２,居１５个参试品种第６位 ,闵行区种子管理站组织区试 ,马桥点单产５１２．７ｋｇ／６６７ｍ２,居７个参试品种第１位 ,比对照９３-６３增产８．６７%。松江区佘山镇农业公司 ,生产试种１ｈｍ２,平均单产４８７．５ｋｇ／６６７ｍ２。２０００年 ,闵行区马桥镇第二农场试种１．３４ｈｍ２ ,平均单产５５… 相似文献
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浙江省2002年审定通过的水稻新品种 总被引：1，自引：1，他引：0
１ .浙粳２０是浙江省农科院作物所选育成的晚粳稻新品种。经浙江省金华市１９９９年和２０００年两年区试 ,平均单产为４５３．０５ｋｇ／６６７ｍ２,比对照秀水１１增产１１．０５ % ,其中１９９９年增产达显著水平 ,２０００年增产达极显著水平。２００１年生产试验平均单产４５９．８ｋｇ／６６７ｍ２,比对照秀水１１增产１１．３%。两年区试结果 :平均全生育期１２７．４天 ,与对照秀水１１相仿。平均每６６７ｍ２有效穗２４．１７万 ,每穗总粒数８２粒 ,实粒数７５．５粒 ,结实率９２．１ % ,千粒重２５．２ｇ。抗性鉴定结果 :高抗稻… 相似文献
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优质杂交早籼新组合华优桂９９经多年试验示范 ,表现出优质、高产、高抗稻瘟等特点 ,并于２０００～２００１年先后通过广西、广东及全国农作物品种审定。一、产量表现华优桂９９于１９９８年晚季在藤县和饶平县农科所参加品比 ,平均产量为４６６．０ｋｇ／６６７ｍ２ 和４２７．４ｋｇ／６６７ｍ２,分别比汕优９６和特优６３增产３．７%和２．２% ;１９９９年早季 ,广西自治区新品种筛选试验 ,平均产量４８４．４ｋｇ／６６７ｍ２,比汕优桂９９减产３．９ %；１９９９和２０００年早季在广东省区域迟熟组初试和复试 ,平均产量初试４６７．… 相似文献
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超级杂交稻Ⅱ优明86高产栽培技术 总被引：1，自引：0，他引：1
超级杂交稻Ⅱ优明８６是福建省三明市农科所用Ⅱ—３２Ａ与明恢８６配组育成的杂交稻新组合 ,具有高产、优质、抗病等优点。２００１年分别通过福建省和全国品种委员会审定 ,现已在沙县生产上大面积推广应用。其稻米品质经农业部稻米及制品质量监督检验测试中心检验 :糙米率８１．２% ,精米率７４ % ,整精米率７０ % ,粒长６．３ｍｍ ,长宽比２．４ ,垩白率３２ % ,垩白度９．０% ,透明度６．２级 ,胶稠度３７ｍｍ ,直链淀粉含量２３．４% ,蛋白质８．８ %。其中有５项指标达一级优质米标准 ,３项指标达二级优质米标准。一、特征特性该组合… 相似文献
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１.津原３８系由天津市原种场育成。全生育期１７６天 ,株高１１０ｃｍ ,根系发达 ,返青快 ,分蘖早 ,后期抗早衰 ,无芒 ,散穗 ,千粒重２６ｇ。易感恶苗病 ,秧龄敏感。整精米率７５ % ,垩白度２ % ,直链淀粉含量１５% ,属国标三级优质米。中抗穗颈瘟。单产５９１．１～６２１．７ｋｇ／６６７ｍ２,比对照增产３．１%～７．５ %。２.津原４５系由天津市原种场育成。全生育期１７６天 ,株高１０５～１１０ｃｍ ,千粒重２７ｇ,长芒 ,口紧。分蘖力中等 ,活棵成熟。整精米率７２．５ % ,垩白度０．７% ,透明度２级 ,直链淀粉含量１７．４% ,米质优… 相似文献
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金早４７(原名金９７—４７)是浙江省金华市农科所选育的早籼新品种 ,２００１年４月通过浙江省农作物品种审定委员会审定。２０００年引入浙江省诸暨市试种 ,经三年种植均表现穗大粒多、丰产性好、抗病性强等优点 ,深受农民欢迎 ,成为诸暨市早稻的主栽品种。现将该品种在诸暨种植的特征特性及栽培技术总结如下 :一、主要特征特性１．产量２００１年参加诸暨市大田对比试验 ,大田单产４８０．５ｋｇ／６６７ｍ２,比对照嘉育９４８增产１３．８% ;在诸暨市王家井镇国家级新品种示范方连片种植３２ｈｍ２,单产达４７３．０ｋｇ／６６７ｍ２ ,… 相似文献
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２００２年 ,安徽省农作物品种审定委员会审定通过了６个水稻新品种 ,现简要介绍如下 :１．皖稻６２原名晚粳９５１５,系安徽省巢湖市炯炀种子分公司选育的晚粳品种。１９９８～１９９９年两年参加区域试验 ,平均单产４３９．８ｋｇ／６６７ｍ２ ,比对照Ｄ９０５５和７０优０４分别增产４．６８%和４．２７ % ;２０００年参加生产试验 ,平均单产３９０ｋｇ／６６７ｍ２,比对照Ｄ９０５５增产７．５０%。全生育期１３１天 ,株高９０～９５ｃｍ ,茎秆粗壮 ,分蘖力较强 ,株型紧凑 ,叶色深绿 ,剑叶窄挺 ,抽穗齐 ,每穗总粒数９０粒左右 ,结实率８… 相似文献
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《Plant Production Science》2013,16(2):189-198
AbstractGrain number per spike of wheat is lower in early sowing than in the conventional standard cultivation in Yamaguchi, Prefecture, Japan. Components of the grain number per spike in five cultivars were analyzed with respect to temperature during the spike development period throughout three growing seasons 2001/2002, 2002/2003 and 2003/2004 to find the cause of the problem of early sowing cultivation. The plants sown in early-October and late-November were called the early sown group and the standard group, respectively, in the following. Three of the five cultivars, Hokushin, Akitakko and Nanbukomugi, showed a strong winter habit, which requires very cold temperatures for spike differentiation. The other two cultivars, Iwainodaichi and Airakomugi, had a moderate winter habit. Grain number per spike and grain yield were decreased by early-sowing (compare with the standard group) in almost all cultivars throughout the three growing seasons. The three cultivars which had a strong winter habit had fewer spikelets per spike in the early-sown group than in the standard group. The other two cultivars which had a moderate winter habit had fewer grains per spikelet in the early-sown group. The higher the temperature during the spikelet formation phase, which is from flag leaf initiation to terminal spikelet initiation, the higher the number of spikelets per spike in the standard group. The spikelet number per spike in the early-sown group increased with the increase in productive tillers under fertile conditions. Such conditions also increased the grain number per spike. 相似文献
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《Journal of Crop Improvement》2013,27(2):415-432
Summary This paper reviews the effects of allelopathic interactions in agroecosystems in Spain on plant physiological activity and their ecological advantages. The phenological stage of growth of donor plants and the effective allelochemicals in the soil solution while studying the role of phenolic compounds were highlighting. Finally possible future prospects and conclusions regarding weed control by allelochemi-cals under integrated crop management strategies are discussed. 相似文献
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以翔实的资料对2009年中国稻米生产、消费、进出口、供求平衡、库存、价格走势、购销政策和国际稻米供求等情况进行了全面地分析,对影响2010年稻米市场价格走势的各种因素进行了深入研究,并在此基础上对2010年我国稻米市场价格走势进行了预测,结论是我国稻米价格仍呈上行趋势。 相似文献
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Summary Diurnal changes in net photosynthetic rate were measured in a furrow-irrigated potato crop and in a riverbed crop where the
water table was always maintained at 20–28 cm from the soil surface. In the irrigated crop, the photosynthetic rate during
mid-afternoon was about half the peak rate observed at noon. This reduction was accompanied by a near tripling of stomatal
resistance, a 45% reduction in transpiration, and a 5-fold increase in the difference between leaf and air temperatures. No
such changes were observed in the riverbed crop where the photosynthetic rate remained nearly constant at about 0.9 mg m−2 s−1 between 9 a.m. and 4 p.m. Tuber yield in the riverbed crop was about 30% higher than in the irrigated crop. 相似文献
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Corné Kempenaar Thomas Been Johan Booij Frits van Evert Jean-Marie Michielsen Corné Kocks 《Potato Research》2017,60(3-4):295-305
Precision agriculture is a farming management concept based on observing, measuring and responding to inter- and intra-field variability in crops. In this paper, we focus on responding to intra-field variability in potato crops and analyse variable rate applications (VRAs). We made an overview of potential VRAs in potato crop management in The Netherlands. We identified 13 potential VRAs in potato, ranging from soil tillage to planting to crop care to selective harvest. We ranked them on availability of ‘proof of concept’ and on-farm test results. For five VRAs, we found test results allowing to make a cost-benefit assessment. These five VRAs were as follows: planting, soil herbicide weed control, N side dress, late blight control and haulm killing. They use one of two types of spatial data: soil maps or biomass index maps. Data on costs and savings of the VRAs showed that the investments in VRAs will pay off under practical conditions in The Netherlands. Savings on pesticide use and N-fertilizer use with the VRAs were on average about 25%, which benefits the environment too. We foresee a slow but gradual adoption of VRAs in potato production. More VRAs will become available given ongoing R&D. The perspectives of VRAs in potatoes are discussed. 相似文献
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体细胞无性系变异是一种重要的细胞工程育种技术,其应用于棉花育种的前提是建立高效的组织培养诱导再生植株体系.本文简要综述了棉花离体诱导植株再生研究的现状,重点讨论了棉花体细胞无性系变异的表现、利用方法及机理,提出了当前研究存在的问题并对今后的研究进行了展望. 相似文献