生根阶段组培微环境变化对蝴蝶兰组培苗驯化的影响

在生根阶段对蝴蝶兰组培苗进行不同蔗糖、CQ浓度和光照处理后，影响蝴蝶兰组培苗的驯化过程的植株生长和光合生理。研究表明，提高组培环境中CQ浓度有效改善组培苗的光合能力利于组培苗的移栽适应性。     

灰树花驯化栽培研究

灰树花驯化栽培研究陈国朱（福建莆田市食用菌开发中心３５１１００）陈玉先（莆田市郑坂中学３５１１４２）灰树花是一种珍贵的食药两用真菌，开发前景广阔。我市稻草蔗渣丰富，从野生灰树花中分离菌种，以稻草蔗渣为培养料进行驯化栽培。１菌种培养１．１组织分离１９９...     

从江苏东台枇杷栽培看实生枇杷的耐低温驯化

从江苏东台枇杷栽培看实生枇杷的耐低温驯化陈其峰厉以仕周长风储祥宏（浙江省农业科学院园艺研究所杭州３１００２１）（江苏省农业科学院园艺研究所）（江苏省东台市园艺站）枇杷是原产中国的亚热带果树，花和幼果若遇低温容易发生冻害。一般枇杷栽培区最冷月平均气温为...     

白皮洋葱组培苗驯化移栽

洋葱组培苗移栽成活与否是组培苗生产的最后一个关键技术,本文介绍了白皮洋葱组培苗移栽时驯化、基质配制、取苗、洗苗、消毒、移栽、水分、温度等技术,供种植者参考。     

黑木耳LSOI菌株的驯化与栽培

黑木耳ＬＳＯＩ菌株的驯化与栽培（浙江省丽水地区食用菌开发研究所）（丽水师专化学系３２３０００）吴锡鹏，黄云坚笔者从野生黑木耳中分离、驯化出一株优良的黑木耳新品种，经菇农在生产中应用，表明该菌株是适合我区气候特征的优良菌株。（一）黑木耳ＬＳＯＩ菌株的获...     

杜鹃属植物种子育苗研究

 采用不同基质、播种时间进行杜鹃属植物种子育苗试验。结果表明: ①种子萌发和幼苗生长最适温度为16～20℃, 庐山地区播种以5月上旬最佳; 材料较多的5个亚属供试种发芽速度以羊踯躅亚属最快, 常绿杜鹃亚属、映山红亚属、杜鹃亚属居中, 马银花亚属最慢。②“腐殖土+苔藓”基质成苗率及幼苗生长表现优于“腐殖土”。③与庐山地理位置越近、气候差异越小, 育苗越易成功, 原产长江中下游、中低海拔的种表现极佳。④不同系统位置的物种育苗效果依次为映山红亚属>马银花亚属>羊踯躅亚属>常绿杜鹃亚属>杜鹃亚属。⑤播种及幼苗期的管理是育苗成败的关键。     

济宁地区加工型辣椒基质穴盘育苗关键技术

针对济宁地区加工型辣椒生产因幼苗质量、土传病害等问题而造成减产的现象,结合生产实际从育苗设施、种子处理、基质配比、穴盘选择与消毒、播种以及苗期管理等方面介绍了加工型辣椒基质穴盘育苗技术。与传统育苗方式相比,穴盘育苗可高效利用设施面积、提高育苗效率,种子出苗快、出苗整齐、成苗率高、节省用种量,定植后缓苗快、易成活、病害轻,设施管理方便、成苗便于运输,是一项值得推广的,同时易于规模化、集约化生产的育苗方法,可供广大菜农及辣椒种植户参考。     

砧木播种密度对西瓜断根嫁接苗生长的影响

为了确定生产中西瓜断根嫁接苗砧木最佳播种密度,采用50孔塑料穴盘,研究了砧木不同播种密度(每穴1粒、每穴2粒、每穴3粒)对砧木苗和西瓜断根嫁接苗生长的影响.结果表明,砧木每穴播种1粒.砧木苗和西瓜断根嫁接苗质量最高;随着播种密度的增加,砧木苗徒长,西瓜断根嫁接苗质量下降.综合考虑嫁接苗质量和育苗成本,认为对50孔穴盘而...     

树莓组培苗驯化技术研究

应用组织培养技术繁育树莓种苗可解决根蘖分株、埋土压条和扦插繁殖,出现生育周期长、苗木质量参差不齐、品种退化、繁殖速度慢等缺点。驯化成活率是组织培养技术能否应用到生产上的关键。高成活率可提高组培苗的利用率,降低生产成本。本试验研究树莓组培苗的生根方式、苗高度、根系长度、苗叶片数及遮光率对驯化成活率的影响。结果显示:双季2831根长为0~0.5 cm时将瓶苗移至驯化室开始驯化,长至组培苗株高2~3 cm,根系长度0.5 cm,2片叶时进行移栽;单季1132根长为0~1.0 cm时将瓶苗移至驯化室开始驯化,长至组培苗株高2~3 cm,根系长度0.5~1.0 cm,二三片叶时进行移栽,移栽后遮光率20%~30%。     

Soil seed banks are short-lived and triggered by the first effective rainfalls in the vacant lots of Santiago,Chile

We studied the temporal variation of the soil seed banks in the urban lots of Santiago, Chile. As most of the plants that emerge from the seed banks in lots are also found in open habitats and are easily germinable, we hypothesize that the seed banks in lots are highly dynamic and short-lived, with the bank depleted every year during the germination season to be reloaded with new seeds during the next seed dispersal period. In each 20 lots for two year (2017 and 2018), 9 soil samples were collected. These samples were obtained from three sampling points randomly distributed across the plots. The seed bank was estimated by seed germination in soil samples placed in plastic trays. The samples of all the lots were stratified at 2 °C by 3 months before sowing. In order to record the seed persistence, soil of three lots watered in 2017 for six months were dried and maintained under dark and non-watered conditions until re-sowing in autumn 2018. To determine if the seeds present cold-associated germination triggers, soils of five lots were maintained under dark conditions for 3 months (soils without cold stratification) for comparison with soils with cold stratification of the same lots. The above-ground plants were recorded in all lots for both years. Forty plant species were recorded in soil bank. The total emerged seedling densities ranged between 7,944 (2017) to 3,700 seedlings m^-2 (2018). Species per lot varied between 17 and 7 during 2017, and between 14 and 3 during 2018. In five lots, seedling densities were not statistically different between cold stratified soil at 2 ° C and non-stratified. In three lots with re-sown soil, seedling density of the first sowing (4,096 seedlings m^-2) was significantly higher than second sowing (201 seedlings m^-2). Thirty-seven plant species were recorded in the above-ground vegetation during 2017 and 42 species in 2018. Species frequency of the seed bank was positively correlated with species frequency of above-ground vegetation. Concluding, the bank is highly dynamic, short-lived, and is depleted every year during the germination season, which begins with effective rainfalls, would be reloaded with seeds during the seed dispersal period.     

狭叶冬青引种驯化试验

狭叶冬青是我国北方地区优良的常绿阔叶绿化树种,具有较高观赏价值,开发前景广阔.2000年,从秦岭南坡引进种子,对狭叶冬青北引抗寒育苗及驯化栽培成苗技术进行了系统研究,总结出一整套从种子播种到绿化成苗的育苗体系,使狭叶冬青在秦岭北部引种成为可能,为该树北移提供理论依据.     

Methods of Raising Cocoa Seedlings in the Nursery and their Effect on Subsequent Growth in the Field

Trials were conducted near Ibadan, Western Nigeria, to find the best method of raising cocoa seedlings in the nursery, and the plants were subsequently transplanted to the field and observed for two further years. In one trial the experimental treatments were amount of shade, time of sowing, amount of watering and type of pot; in a second trial times of sowing and transplanting were varied and seed was also sown at its permanent site.

Seedlings grew well in the nursery in polythene pots under a shade of from eight to ten palm fronds per 10 ft. length and with light watering. Late sowing and early transplanting were satisfactory, so seedlings need only remain in the nursery for five or six months; in the Ibadan area this was achieved by sowing in December and transplanting in late Mayor early June. Younger plants also grow well in the field, but there are risks in sowing seed in January, when cold, dry harmattan winds may be expected. Provided a plant is big enough to transplant, its original size has no bearing on its subsequent growth in the field, as measured by trunk girth at threemonthly intervals. Sowing seed at permanent sites is risky, as beans may be eaten by rodents.     

苗龄天数对豇豆生长和产量的影响

采用穴盘育苗,研究了不同苗龄定植对豇豆生长以及产量的影响。试验结果表明,穴盘育苗中以5 d苗龄定植的豇豆产量最高,其次为9 d,综合豇豆生长表现,穴盘育苗时,以5~9 d的豇豆幼苗为适宜的定植苗龄。     

覆土厚度和钙肥对野生清香木播种的影响

以野生清香木种子为试验材料,研究覆土厚度及钙肥对清香木播种的影响。结果表明：清香木种子现采现播发芽率可达67.4%,采用育苗盘播种育苗时,1-5倍厚的土壤中也能正常发芽;清香木抗盐能力较强,在添加25%过磷酸钙河沙中也能正常发芽,发芽率最高可达71.1%。     

潮汐灌溉营养液浓度分段设定对番茄穴盘苗生长的影响

以中杂302为试材,将番茄穴盘苗生长发育分为5个阶段(Ⅰ:播种至出苗;Ⅱ:出苗至子叶平展;Ⅲ:子叶平展至二叶一心;Ⅳ:二叶一心至三叶一心;Ⅴ:三叶一心至四叶一心),分段设定9个营养液浓度组合,研究潮汐灌溉条件下营养液浓度分段设定对番茄穴盘苗生长发育、养分积累量及利用率的影响.结果表明:在第Ⅰ阶段,灌溉1.0×营养液,番...