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秋海棠新品种‘开云’（‘银珠’× 歪叶秋海棠）,‘星光’（‘银珠’× 光滑秋海棠）和‘昴’（‘银珠’ב白王’）均通过有性杂交从其后代群体中选择培育而成,其株形好,是一类既可观叶又可观花的室内草本观赏花卉。 相似文献
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5种樱桃砧木光合特性的初步研究 总被引：2，自引：3，他引：2
以马哈利、大青叶、本溪山樱、吉塞拉5号及考特5种樱桃砧木为试材, 通过气体交换等方法研究了它们的光合特性。结果表明, 马哈利对低浓度CO2及高光强利用能力均强, 光合能力最大; 考特对弱光利用能力显著强于马哈利和吉塞拉5号, 但其光合能力最弱; 5种樱桃砧木新梢中下部、中部、中上部叶面积占新梢总叶面积比率及相应3部分光合产物占总光合产物比率均明显高于基部和顶部所占比率,中下部及中部叶片较大且发育良好, 是整个新梢叶片光合生产力的主要贡献者。 相似文献
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以10种不同品种欧李为试材,在田间试验条件下,研究了其生长指标、叶绿素相对含量、产量以及果实品质;同时引入模糊综合评价法,构建产量、品质和生物学性状方面共10个因子的欧李品种综合效益评价体系,采用层次分析法(AHP)确定各评价因子的权重,结合隶属度函数及5个等级的评价矩阵,通过模糊综合评价数学模型计算得出不同品种压砂地欧李综合效益评价值,为压砂地欧李产业的发展提供参考依据。结果表明:水肥和栽培相同条件下,‘5号’的667m^2产量最高,‘4号’果实钙含量及其叶片叶绿素相对含量最高。10个品种欧李模糊综合效益值排序为‘6号’>‘07-14’>‘5号’>‘03-25’>‘4号’>‘7号’>‘S-D’>‘23-04’>‘03-35’>‘9号’。根据单因素分析结果,‘5号’和‘4号’具有较好的适应性。欧李坐果主要依靠异花授粉,根据模糊综合效益值排序,可选取‘6号’‘07-14’‘5号’欧李在压砂地种植。 相似文献
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D. C. E. Wurr Jane R. Fellows 《The Journal of Horticultural Science and Biotechnology》2013,88(5):691-697
SummaryIn experiments in 1994 and 1995 a range of transplanting dates and thermal crop covering treatments were used to produce different environmental conditions for the growth of two Roscoff cauliflower selections ‘December/January’ and ‘March’. In 1994 non-covered plants of ‘March’ initiated on average 19 d later and with 19 leaves more than ‘December/January’. In the two seasons, covering the crops gave delays in curd initiation of up to 93 d, depending on planting date, and increased the number of leaves produced by up to 50 compared with non-covered crops. Leaf production was best described by an accumulated effective day-degree scale using day-degrees <17°C for ‘December/ January’ and day-degrees <16°C for ‘March’. This shows that both light and temperature are concerned with controlling leaf production. During the juvenile phase of growth, apex diameters expanded linearly with temperature up to a diameter of about 0.2 mm. After this there was a different response to temperature suggesting that a phase change had occurred at an apex diameter of 0.2 mm. When this occurred numbers of leaves ranged from 23 to 28. Vernalization appeared to occur most rapidly in ‘December/January’ between 12 and 16°C with an optimum at about 14°C while in ‘March’ the optimum appeared to be slightly lower than this. Any increase in time spent at temperatures in excess of 16°C delayed curd initiation. 相似文献
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‘中石4号’和‘中石9号’是从文冠果实生群体中选育出的新品种。树势均较强,速生,丰产,抗逆性强,雌花比例均在60%以上,单瓣花,种子单粒质量大,均在1.5
g以上,种仁含油率均在65%以上。‘中石4号’当年生枝被毛,绿色,小叶片表面有蜡质、光泽感强,蒴果中等大小,球形,果壳中等厚度。‘中石9号’多年生枝无毛,绿带紫红,小叶无蜡质,蒴果大,棱柱形,果壳厚。在辽西地区,‘中石4号’5月上旬盛花,8月上旬果实成熟,‘中石9号’5月中旬盛花,8月中旬果实成熟。两品种果实发育期均为75 d左右,均可在中国东北、西北、华北地区广泛栽植。 相似文献
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‘惠丰8号’是由自交不亲和系‘9203-4-3-11’与‘9908-1-10’杂交而成的早熟甘蓝一代杂种。从定植到商品成熟60 ~ 63 d。生长势较强,植株开展度48 ~ 52 cm,外叶深绿色,蜡粉中等;叶球圆球形,嫩绿色,结球紧实,较耐裂球,球横径16 cm左右,球高16 cm左右,中心柱长6.3 cm,球叶脆嫩,味较甜,风味品质佳。单球质量1.3 ~ 1.5 kg,产量60.0 ~ 67.5 t ? hm-2。抗病毒病 （TuMV）,冬性较强,适宜在华北地区作春甘蓝栽培,也可作早熟秋甘蓝种植。 相似文献