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湖南省杂交晚稻区试结果分析 总被引：1，自引：0，他引：1
对１０ 年来湖南省晚稻区试参试组合的产量、生育期、经济性状及审定组合的产量、生育期、米质、抗性进行了分析。中熟参试组合的平均产量高于对照,生育期长于对照;迟熟参试组合平均产量低于对照,生育期短于对照。审定的中熟组合平均产量高于对照４．４％ ,迟熟组合平均产量低于对照２．９％ ,米质有所提高,但稻瘟病特别是白叶枯病抗性差 相似文献
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1999年包头华资实业股份有限公司引进由荷兰安地公司选育的单粒二倍体甜菜品种瑞福(RIVAL)，在2000年和2002年的内蒙古自治区甜菜品种区域试验(抗丛组)中，平均根产量分别比对照甜研303增产156．8％和271．5％；平均舍糖率分别比对照低0．53度和提高0．16度；平均产糖量分别比对照增加145．2％和280．0％。在2001年的丛根病区生产试验中，根产量、舍糖率和产糖量分别比对照提高347．2kg／hm^2、5．03度和405．6％，病情指数为18。各项指标达到了耐病型品种标准。2004年通过了内蒙古自治区农作物品种审定委员会审定。 相似文献
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辽盐39是经过杂交选育的水稻新品系该品种主要特点是产量高、抗性好、米质较优区试产量为610.2kg/667m^2，比对照增产6．7％；中抗稻瘟病，稻曲病轻，纹枯病轻、耐肥抗倒；米质有五项指标达部颁优质一级标准，五项达部颁优质二级标准适合在沈阳以南辽河中下游平原稻区推广种植。 相似文献
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低芥酸杂交油菜渝杂18由西南农业大学采用化学杀雄方法育成，品比试验产量1950－2715kg/hm^2；重庆市区域试验平均产量1946kg/hm^2，比对照品种中油821增产2．21％，生产试验平均产量2139kg/hm^2；比对照中油821增产22．3％。渝杂18商品种子含油量39．97％，芥酸含量0．62％。1998年通过重庆市农作物品种审定委员会审定。 相似文献
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１９９４年益阳市种子公司从湖南农业大学引进三系杂交新组合威优１９８,经２ａ市区试和示范,表现农艺性状稳定,生长势强,繁茂性好,产量高,抗性好,米质优。１９９６年２月１日经益阳市农作物品种审定小组审定通过,列为“九五”期间全市大面积推广组合;１９９８年２月通过湖南省农作物品种审定委员会认定。现将该组会的特征特性和高产栽培技术总结如下。１ 主要特征特性１．１丰产性能好１．１．１高产稳产。威优１９８经１９９４～１９９５年２ａ市区试,平均产量７．２８ｔ／ｈｍ２,比对照威优４６增产７％（达显著水平）。１９… 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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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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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