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福建省4种兰科植物新记录 总被引：1，自引：0，他引：1
报道了福建兰科植物分布新记录4种,分别为箭药叉柱兰（Cheirostylis monteiroi S. Y. Hu）、秉滔羊耳蒜（Cestichis pingtaoi G. D. Tang, X. Y. Zhuang & Z. J. Liu）、裂距虾脊兰（Calanthe trifida T. Tang et F. T. Wang）、深圳香荚兰（Vanilla shenzhenica Z. J. Liu et S. C. Chen）。凭证标本现存于福建农林大学标本馆（FJFC）。 相似文献
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一、茶组植物分类的历史和现状茶组植物(Section Thea)分类的历史大致经历了三个转折点:一、茶属茶种(Thea sinensis)的命名;二、山茶属(Camellia)与茶属(Thea)的合并;三、R·Sealy的《山茶属分类的订正》的发表。1753年,林奈首次命名茶种Theasinensis Linn,他是根据德国医生Kae-mpfer,的材料命名的。同年也命名了山茶种为Camellia japonica Linn。1818年,R·Sweet首次提出了Camellia属与 相似文献
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云南紫娟特种茶特征及栽培要点 总被引：1，自引：0，他引：1
紫娟茶属山茶科(Theaceae)山茶属(Camellia)茶组植物(Camellia sinensis(L.)O.Kuntze)茶种(Camelliasinensis)中的普洱茶变种(C.sinensis var.assamica),是云南省农业科学院茶叶研究所于1985年在云南大叶群体品种中发现的一株茶树具有紫芽、紫叶、紫茎,并且所制干茶和茶汤皆紫色的茶树品种,故取名为"紫娟"。紫娟茶是云南大叶群体种中的一种稀有茶树品种,该品种于2005年11月28日被国家林业局植物新品种保护办公室授权保护,品种权号为20050031。 相似文献
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二、近年来茶树分类的研究进展随着收集材料的不断丰富,植物学界对山茶植物的理解亦在逐步深化。如在1925年,梅尔却(Melchior)综合前人的见解,把山茶属分为5个组。对于茶的学名和分类学地位问题,大多数学者都认为Camellia与Thea两属应该合并。合并后的属名照理应该是Thea,因林奈发表这两个届时,是Thea先于Camellia。可是那时还没有提到属名的优先律,况且又涉及到其他山茶的归属问题。在1935年的荷兰国际植物学会上又订了规定:“凡是两个属合并时,皆以第一次采用合并名为有效。”同时,还认为林奈的两卷《植物种志》虽属同年不同月份发表,而仍当视作同期发表。因此,则认为1822年司维特所定的茶之属名Camellia为有效,而O.孔茨(Kuntze)在1881年提出茶树学名Camellia sinensis(L.)O.Kuntze 相似文献
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浙江省兰科植物新记录 总被引：1，自引：0，他引：1
本文报道了浙江省兰科植物4个新记录种,分别是藓叶卷瓣兰（Bulbophyllum retusiusculum Rchb. f.）、秉滔羊耳蒜（Cestichis pingtaoi G. D. Tang, X. Y. Zhuang & Z. J. Liu）、政和石斛（Dendrobium zhenghuoense S.P. Chen, L. Ma & M. H. Li）和无叶美冠兰[Eulophia zollingeri (Rchb. f.) J. J. Sm.],凭证标本保存于温州大学植物标本室（WZU）。新记录种的发现丰富了浙江植物区系的种质资源,为其地理分布的研究提供基础资料。 相似文献
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原来用于生产种子的茶树,现在变成多余了的茶园.在两年结果周期中,高产的一年每公顷能收种子4吨以上,估计每公顷产油约0.8吨.提取出来的油质量很好,与一般食用油的特性相似.山茶属(Camellia)的所有种都能生产含油的大粒种子(Sealy,1958),其中几个种已作为商品性大规模生产食用烹调油.例如日本把观尝用的日本山茶(C.japonica),中国利用山茶C.sasanqua和油茶C.cleifera生产茶籽.然而,饮料茶树(Camellia sinensis(L)O.Kuntze)种子中的含油量还没有被利用.这是因为种植园的制度,迄今还生产叶子,而大大地妨碍了种子的生产.由于中非成功地应用无性系和无性繁殖的方法,不再需要依靠特别管理的茶园来专门生产茶子作为种植材料了.本文研究了茶树种籽油的特性和考虑一些多余的种子园的茶籽产量问题. 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