共查询到20条相似文献，搜索用时 60 毫秒
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（1）镇批232：系江苏丘陵地区镇江农科所育成的中他稻品种。该品种综合性状较好，株型集散适中，剑叶挺举，叶色稍深。株高110cm，茎秆弹性较好，分案力较强。每穗总粒135粒左右，结实率90％左右，千粒重24.5g。米质较优。全生育期145天左右，后期转色较好。抗逆性较强，抗倒性好。抗白叶枯病，高抗稻瘟病和揭飞虱，纹枯病较轻。丰产性较好，省区域试验平均单产8012．55kg／hm2，扬辐他2号增产1.9％；省生产试验平均单产8598.6kg／hm2，比标辐他2号增5．98％。适宜在江苏淮南南部中他稍地区中上等肥力条件下种植。（2）特优559：系江苏沿海… 相似文献
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2006年江苏省审定通过的水稻新品种 总被引：1，自引：0，他引：1
2006年江苏省第三十九次农作物品种审定会议召开,会议审定通过了16个水稻新品种。本文简介了16个水稻新品种的特征特性及产量表现。 相似文献
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（－）审定品种（组合）（1）中鉴100中国水稻研究所选育的中熟优质早税品种。1997、1998两年区试，平均每667m2产量440kg，比对照湘早舢13号低2％。生育期106天，比湘早舢13号长1～2天。被评为省三等优质稻品种。经鉴定，中抗白叶枯病，高感猪瘟病。株高80～85cm，施肥抗倒，分秦力较强，每穗粒数80粒．结实率80％，谷长粒型，千粒重24g。苗期耐寒，适宜早播。注意防治猪瘟病、二比螟及稍纵卷叶螟。可在猪瘟病轻的地区推广。（2）湘早抓28号原编号94早810。湖南农业大学水稻科研所选育的中熟早舢稻品种。1997、1998两年区试，平均每667m’… 相似文献
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（1）特优524：汕头市农科所用龙特浦A与R524（明恢63／特青）组配而成的早籼中迟熟杂交稻组合。1994、1995两年参加省早稻区试，单产分别为7252.5kg／hm2，7297.5kg／hm2，比对照汕优63增产5.59％和6.55％，均未达显著水平。米质外规定级为早稻四级。稻瘟病全群抗性比78．3％，白叶枯病7级为感。全生育期早稻130天，与汕优63相近。1996年全省试种面积1．2万公顷，适宜广东粤北以外地区作早稻种植。由于该组合不育系在外界条件适合时，有少量自交结实现象，因此制种要特别注意选用纯度高的不育系，以确保杂交种子的纯度。（2）优优4480：广… 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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《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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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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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
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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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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