共查询到20条相似文献，搜索用时 79 毫秒
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引进12个早稻新品种在漳州市进行区试,结果表明,参加2 a区试品种:玉香88、金稻138比对照种华优桂99增产达显著或不显著,表现综合性状好;参加1a区试品种:漳香占表现比对照种增产,不显著,中抗稻瘟病,米质外观优,综合性状优良. 相似文献
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通过对13个大豆品种引种试验,分析各品种的产量及性状表现,结果表明产量以黄沙豆为最高,其次是高产50、JN843-06,分别比对照铁丰29增产150.1%、145.7%、136.1%.通过综合分析,认为黄沙豆、高产50、JN9843-06可进一步试验研究. 相似文献
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2011～2016年在武夷山开展乌龙茶新品种区域试验,对参试品种春桃香、紫观音的主要经济性状进行鉴定评价.结果表明,春桃香、紫观音的均产分别比对照种黄棪增加73.64％、9.13％;香气与滋味的感官审评加和总分均比对照种高1～2分,且在不同采摘批次间表现稳定;成活率、生长势等性状均与对照相当,特别是成活率,春桃香和紫观音的成活率分别高达97.9％和99％,开采期均晚于对照种10 d左右,属晚生种.在武夷山区试点种性特征表现优异,适宜在武夷山及气候条件相类似的茶区推广种植. 相似文献
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本文对22份红麻品种材料中初选出的7个品种（系）的干茎产量、纸浆得率、抗炭疽病性及构成产量的主要经济性状进行了研究。结果表明,在夏播麦茬麻中ZGR5、ZGR15、ZGR8和红11的干茎产量分别比对照青皮3号增产29．4％、21．9％、21．6％和20．2％,其差异达极显著水平,在春播试验中分别比对照增产15．4％、19．6％、21．4％和11．9％,它们的纸浆得率平均比对照提高0．21～1．44个百分点。且ZGR15、ZGR5、ZGR8和红11的抗炭疽病性、皮骨比值和主要经济性状均优于对照,是适合红麻造纸的高产抗病优良品种。 相似文献
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为筛选出适宜海南种植的咖啡新品种,2010—2015年对2个咖啡品种(系)兴1和兴28进行田间比较试验,以热研2号为对照,系统进行农艺性状、经济性状和品质性状的测定和分析。结果表明:兴1鲜干比小,百粒重和出米率显著高于热研2号,产量为1.92 kg/株,比对照增产24.67%,品质风味好;兴28鲜干比小,百粒重大,出米率高,干豆产量为2.26 kg/株,比对照热研2号增产46.75%,营养成分含量高,品质风味好。因此,兴1、兴28这2个中粒种咖啡品种性状优良,可作为在低海拔地区推广应用的候选品种。 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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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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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