共查询到19条相似文献,搜索用时 203 毫秒
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早熟大白菜新品种‘多抗55’ 总被引:1,自引:1,他引:0
‘多抗55’大白菜是利用自交不亲和系‘XZ55’和自交系‘小包’杂交培育而成的一代杂种,优质,抗病,早熟。生长期55 d,株高29.4 cm,开展度54.6 cm × 51.4 cm。叶球叠抱,外叶浅绿,心叶鲜嫩,纤维少,质地脆嫩,口感好,味甜,软叶率58.2%。叶球质量1.6 kg,净菜率75%,产量90 000 ~ 97 500 kg &;#8226; hm-2。适收期长,叶球长成后延期生长不裂球;耐热,抗霜霉病、病毒病和黑腐病,适合河北省及气候相似地区种植。 相似文献
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‘青研早9号’是青岛市农业科学研究院以自交不亲和系‘新C-2-6’为母本,‘F1-4’为父本杂交育成的早熟秋大白菜新品种。生长期6065 d,株高38 cm,开展度70 cm,外叶披张,绿色,多皱褶,刺毛较少,叶柄白绿色。叶球倒卵形,球叶叠抱,球顶平,球高26 cm,球径16 cm,单球质量265 d,株高38 cm,开展度70 cm,外叶披张,绿色,多皱褶,刺毛较少,叶柄白绿色。叶球倒卵形,球叶叠抱,球顶平,球高26 cm,球径16 cm,单球质量23 kg,667 m2产量5 0003 kg,667 m2产量5 0005 500 kg,田间综合抗性强,品质优。适合山东、山西、河南、贵州、云南等地种植。 相似文献
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提高宁夏旱砂地幼龄枣树坐果率的技术研究 总被引:1,自引:0,他引:1
以种植在宁夏中卫市香山干旱山区压砂地的3a生‘同心圆枣’树(行间套种西瓜,产量12 000~13 500kg/hm2)为试材,研究了当年生枣头单纯摘心、‘新枣头+二次枝’双摘心、叶喷赤霉素以及主干环切等措施对幼龄枣树坐果率、坐果量、枣头及二次枝粗度和其它树体生长发育指标的影响。结果表明:盛花期枣头摘心提高坐果率的效果好于初花期或盛花初期;‘新枣头+二次枝保留2~4节’双摘心,或‘新枣头摘心+叶喷20mg/kg赤霉素’,均具有明显的提高坐果率和单株坐果量的效果,但主干环切或‘新枣头摘心+主干环切’或‘新枣头+二次枝’双摘心+主干环切均更能极显著地提高坐果率和坐果量;在花期,‘新枣头+二次枝保留2~4节’双摘心能较明显地提高新枣头和二次枝的粗度。主干环切幼树的主干年增粗率明显小于新枣头摘心或‘新枣头+二次枝’双摘心的树。 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
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以唐菖蒲(Gladiolus hybridus)品种‘Rose Supreme’的球茎为试材,通过RT-PCR和RACE技术克隆到了一个全长为2 797 bp的茉莉酸(Jasmonic acid,JA)生物合成关键酶LOX基因的cDNA序列,命名为GhLOX1,属于9-LOX。该序列含有一个2 541 bp的开放阅读框(ORF),编码846个氨基酸,推导的蛋白质分子量为94.90 kD。RT-PCR表达分析表明,该基因在唐菖蒲叶、花、根、匍匐茎、新球茎和籽球上都表达,而在叶和匍匐茎中表达量最高,在花和籽球中表达量较低;离体条件下,经过0、0.1、0.5、1.0、2.0 mmol · L-1的不同浓度梯度的水杨酸(SA)处理后,其表达水平随着浓度的升高而降低,当SA浓度达到2.0 mmol · L-1时没有表达。 相似文献
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通过RT-PCR 与RACE 技术从唐菖蒲(Gladiolus hybridus)品种‘Rose Supreme’球茎中克
隆茉莉酸生物合成途径中的关键酶——12–氧–植物二烯酸还原酶(12-oxo-phytodienoic acid reductase,
OPR)基因的1 489 bp 全长cDNA 序列,quantitative RT-PCR 结果表明,GhOPR3 在唐菖蒲叶、花、根、
匍匐茎、新球茎和籽球中都表达,其中在籽球和匍匐茎中相对表达量较高;0.1 ~ 0.5 mmol · L-1 的茉莉酸
甲酯(Methyl jasmonate,MJ)处理后,提高了GhOPR3 在球茎中的表达量和内源MJ 含量;采用农杆菌
介导侵染拟南芥花粉,进行GhOPR3 基因的过表达分析,过表达拟南芥株系较野生型提高了耐盐性和抗
旱性;提高了机械损伤后相关基因的表达水平和内源MJ 含量。 相似文献
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在水培条件下,对大蒜品种‘金乡3号’、‘苍山糙蒜’和‘四川早薹’不同分瓣方式(单瓣、半头和整头)种植的青蒜苗生长和品质产量进行比较,结果表明:在单瓣种植条件下,‘金乡3号’的生长量(株高、假茎粗、假茎长及单株鲜质量)、综合品质及青蒜苗产量显著高于其他两个品种。‘金乡3号’单瓣种植的蒜苗生长量(株高、假茎粗、假茎长及单株鲜质量)、色素含量、光合参数、根系活力、综合品质及产量显著高于其他两个处理。因此,水培青蒜苗较好的品种为‘金乡3号’,且较好的种植方式为单瓣种植。 相似文献
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Donna M. Morrison Erin E. Blankenship Paul E. Read Ellen T. Paparozzi 《International Journal of Fruit Science》2018,18(2):138-152
ABSTRACTThe four experiments described here are part of a 5-year program focused on determining whether day-neutral and short-day strawberries would be suitable for commercial off-season/winter (temperate climate) production in greenhouses. All research was performed using container-grown plants fertigated through a capillary mat production system with heat supplied under the benches. The first experiment focused on stolon development. The second experiment investigated the influence of stolon removal on berry production and included the removal of flowers for the first three weeks. The third and fourth experiments were conducted as a comparison of university research (experiment 3) versus a commercial operation (experiment 4). In experiment one, of 13 cultivars, ‘AC Wendy’ plants produced significantly more stolons than the other cultivars. In experiment two, stolon production peaked at weeks 12 and 13, with ‘Chandler’ plants producing significantly more stolons (starting at week 9) than the other cultivars. At week 13, ‘Seascape’ plants produced more total berry weight than the other cultivars. The influence of stolon removal on total berry weight varied, with ‘Evie-2+’ plants (large crowns) producing higher total berry weight with the stolons on as compared to ‘Evie-2’ plants, which produced higher total berry weight with the stolons removed. In experiment 2, fruit production was low and was probably a result of deflowering for three weeks. Consequently, it may not be advisable to deflower during the ‘off-season’ for greenhouse-grown strawberries. In the final two experiments, which involved a commercial cooperator as well as the university greenhouse, it was found that of the five cultivars trialed, the same cultivars at both sites produced the maximum total berry weight. Stolon production differed at the two locations, but the optimal time for stolon removal was similar. Thus, it is recommended that for winter greenhouse production, stolons be removed initially at week 8 and then at weeks 11–12 of the production cycle. 相似文献
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以“农大6号”和“农大7号”欧李为试材,采用温室有机栽培的方法,设置4个栽植密度(0.5m×0.5m、0.5m×1.0m、0.5m×1.5m、1.0m×1.0m),对欧李的生长指标(株高、地径、冠幅)、叶面积(LA)、比叶面积(SLA)、叶片干物质含量(LDMC)、叶绿素含量(SPAD)及荧光指标(Fo、Fm、Fv/Fm、Fv/Fo、qN、qP、ETR)进行了测定,以探究栽植密度对温室有机欧李生长及光能利用的影响,为其高效生产栽培提供参考依据。结果表明:不同栽植密度对欧李的生长及光能利用均有显著影响,且因品种而异。“农大6号”的生长及对光能的利用随密度减小先增大后减小。栽植密度为0.5m×0.5m时,其地径、冠幅、LA、SLA均最小,荧光参数Fv/Fm、Fv/Fo最小,qN值最大;当密度减小至0.5m×1.5m时,“农大6号”的株高、地径、冠幅均最大,LA、SLA、SPAD值最高,且地径、冠幅显著高于其它密度(P<0.05),荧光参数Fv/Fm、Fv/Fo值最大,qN值最小;密度减小至1.0m×1.0m时,各指标均有不同程度的下降。“农大7号”的生长及对光能的利用随密度的减小而增大。0.5m×0.5 m密度下地径、冠幅、LA、SLA、SPAD值最低,ETR、qP、qN值均较大;1.0m×1.0m密度下地径、冠幅、LA值均最大,SPAD值最高,荧光参数Fv/Fm、Fv/Fo、ETR值最大,qN值最小。温室有机栽培模式下,“农大6号”和“农大7号”的适宜栽培密度分别为0.5m×1.5m、1.0m×1.0m。在欧李的温室生产栽培中,应根据品种确定合理的栽植密度以确保植株生长良好及效益最大化。 相似文献
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以‘红颜’‘章姬’2个草莓品种脱毒苗和常规苗为试材,比较脱毒苗与常规苗在植物学生长特性和果实抗病性方面的表现,以期为上海地区草莓优质种苗的繁育、母苗选择、育苗方式的选择提供科学指导。结果表明:脱毒苗在炼苗期叶片病虫害发生率控制在0%~6%。在相同栽培模式下,‘红颜’脱毒苗的生长势较常规苗株高、冠径、单株匍匐茎和单株花序分别增加了8.40 cm、1.70 cm、1.75条、1.77个;‘章姬’脱毒苗的生长势较常规苗株高、冠径、单株匍匐茎和单株花序分别增加了3.89 cm、0.74 cm、1.60条、1.10个。同时‘红颜’脱毒苗定植后果实病害发生率从常规苗的17.33%降低到脱毒苗的2.66%;‘章姬’脱毒苗定植后果实病害发生率从常规苗的13.33%降低到0%。不同栽培模式下繁苗,‘红颜’脱毒苗在单层X支架式栽培下生长势较单层单列式栽培模式下株高、冠径和单株匍匐茎数目分别增加了6.10 cm、2.48 cm与2.77条。‘红颜’‘章姬’脱毒苗比常规苗在繁苗期生长势更旺盛,‘红颜’脱毒苗在生产时期果实病害发生率比常规苗极显著性降低,‘红颜’脱毒苗采用常规地垄式栽培比立架栽培植株生长势和繁苗率高。 相似文献
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The growth, development and mineral contents of 3 cultivars of amarant (Amaranthus cruentus L.), ‘Large Leaf’, ‘Light Red’ and ‘Local Green’, were compared in a greenhouse study. There were small differences between the cultivars for the development per plant of leaf area, number of branches, number of nodes, and dry-weight production of stems, roots, inflorescences and most especially leaves at the edible stage. The 3 cultivars produced edible shoots between 5 and 7 weeks. There were, however, significant differences in the mineral content of the cultivars, in the order ‘Local Green’ > ‘Large Leaf’ > ‘Light Red’, for the concentrations of nitrogen, calcium, magnesium, iron and manganese. It is concluded that, although the 3 cultivars matured at the same time, ‘Local Green’ was the most nutritive as to mineral contents. 相似文献
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To the tenth leaf the influence of two planting systems on yield and fruit size of pear cultivars ‘Conference, 202’ and ‘Alexander Lucas’ grafted on the rootstocks Quince A (MA) and Quince C (MC) was investigated. The planting systems “Slender Spindle” (3.25?×?1.25 m) and “Güttinger-V-System” (3.50?×?0.60 m) were compared. The “Güttinger-V-System” led to higher yields than the planting system “Slender Spindle”. In average of both cultivars and rootstocks the difference between the planting systems amounted to 75.9 t/ha from the third to the tenth leaf. To the additional yield of the “Güttinger-V-System” face additional costs for the installation of the orchard and for the formation of crown. Thus the decision for this planting system will be influenced in a high measure from the producer price. 相似文献