共查询到20条相似文献，搜索用时 62 毫秒
1.
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
2.
江西省2002年审定通过的水稻新品种 总被引：1，自引：0，他引：1
１.赣早籼４９号系由江西省农业科学院水稻研究所育成的常规早稻品种。全生育期１０６．７天。株高７４．８３ｃｍ ,每６６７ｍ２ 有效穗３０．１５万 ,每穗总粒数５０．３３粒 ,结实率８２．６３% ,千粒重２４．４ｇ。出糙率７９．４ % ,整精米率４９．８ % ,粒长６．９ｍｍ ,长宽比３．３ ,垩白粒率１９% ,垩白度２．８% ,直链淀粉含量１４．０% ,胶稠度７４ｍｍ。稻瘟病抗性 :苗瘟０级 ,叶瘟０级 ,穗颈瘟０级 ,接种鉴定２级。２０００～２００１年参加江西省水稻区试 ,２０００年平均单产３５３．６９ｋｇ／６６７ｍ２ ,比对照赣早籼４０… 相似文献
3.
１．鄂早１３系湖北大学育成的早稻品种。１９９８～１９９９年参加湖北省早稻品种区试 ,两年试验平均单产４５５．５９ｋｇ／６６７ｍ２,比对照鄂早１１增产１６．３０ %。全生育期１１２天。２．鄂早１４系黄冈市农科所育成的早稻品种。１９９８～１９９９年参加湖北省早稻品种区试 ,两年试验平均单产３９３．８７ｋｇ／６６７ｍ２,比对照鄂早１１增产６．１０%。全生育期１０８天。３．鄂早１５系湖北省荆州农科院育成的早稻品种。１９９９～２０００年参加湖北省早稻品种区试 ,两年试验平均单产４２８．６３ｋｇ／６６７ｍ２ ,比对照鄂… 相似文献
4.
津稻５号天津市水稻研究所育成。粳型。全生育期１７６天 ,株高１１０ｃｍ ,株型紧凑 ,叶片上举 ;茎秆粗壮 ,抗倒 ,属紧穗型品种。每穗总粒数１３３粒 ,结实率８５ % ,千粒重２５ｇ,分蘖中等 ,成穗率高。后期熟色好 ,产量潜力高 ,丰产性和稳产性好 ,适应性强。抗穗颈瘟 ,中抗枝梗瘟病。１９９８、１９９９年参加天津市区试 ,平均单产５８８．９３ｋｇ／６６７ｍ２,较对照津稻１１８７增产１２．３%。１９９９年参加天津市生产试验 ,平均单产５５３．３ｋｇ／６６７ｍ２ ,较对照津稻１１８７增产１１．６ %。2001年天津市审定的水稻品种@张存… 相似文献
5.
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
6.
福建省2001年审定通过的水稻新品种 总被引：1，自引：0，他引：1
１.优Ⅰ６６系中国水稻研究所选育的早籼杂交水稻 ,南平市农科所引进。１９９９～２０００两年省区试 ,平均单产分别为４２８．６ｋｇ／６６７ｍ２和４３１．４ｋｇ／６６７ｍ２,比对照闽科早２２增产１７．１８%和１６．０７ %。作早稻全生育期１２１天 ,比对照迟熟２天左右。中感稻瘟病 ,该组合适宜在福建省南平、三明、宁德、福州稻瘟病轻发区作早稻种植。栽培上应防止后期偏施氮肥。２.Ｔ优７８８９系福建农林大学、福建种子总站选育的早籼杂交水稻。１９９９～２０００两年省区试 ,平均单产分别为４３７．４ｋｇ／６６７ｍ２和４５８．… 相似文献
7.
“两优培九”是江苏省农科院“８６３”课题组育成的两系杂交水稻组合 ,即“超级稻”。我市引进试种已有４年 ,２０００年全市作单季晚稻种植面积已达８０００ｈｍ２以上 ,一般单产５５０～６００ｋｇ／６６７ｍ２。试种地区群众普遍认为 :两优培九在本市作单季晚稻栽培 ,能够较好地发挥其增产潜力 ,每６６７ｍ２可比一般杂交水稻多收稻谷５０～１００ｋｇ。一、特征特性两优培九在我市作单晚种植 ,全生育期１３２～１４２天 ,比协优４６长７天左右。株高１１０～１２５ｃｍ ,穗大粒多 ,结实率达８０%～９０% ,千粒重２６～２７ｇ。株型紧凑… 相似文献
8.
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
9.
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
10.
１ .鄂早１６系湖北省荆州市种子总公司育成的早稻品种。１９９８～１９９９年参加湖北省早稻品种区试 ,两年试验平均单产３７８．０７ｋｇ／６６７ｍ２,比对照鄂早１１减产３．５１ %。全生育期１１１．６天 ,比鄂早１１长３．６天。高感白叶枯病和穗颈稻瘟病。２.嘉育２０２系浙江省嘉兴市农业科学研究院育成的早稻品种。２０００～２００１年参加湖北省早稻品种区试 ,两年试验平均单产４５４．０９ｋｇ／６６７ｍ２,比对照鄂早１１增产５．３３ %。全生育期１０６．８天 ,比鄂早１１长０．８天。中抗白叶枯病 ,高感穗颈稻瘟病。３.嘉育１… 相似文献
11.
《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
12.
《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
13.
14.
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
15.
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
16.
17.
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
18.
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
19.