甘肃河西走廊大苗移栽如何操作

在苗木培育中,为了提高苗木生长速度,总要进行苗木出圃移栽或造林;从外地调来的苗木,也要进行栽植。但是,无论是同地移栽,还是异地移栽,必须要有科学态度,按照客观规律采取适当的技术措施,才可提高移栽成活率。笔者根据多年的苗木移栽实践经验,总结此文,供苗木培育工作者参考。     

国外松芽苗移栽育苗技术

国外松运用芽苗移栽培育的苗木生长整齐、均匀,一级苗率达80%以上,只要管理得当,不会产生三级苗。苗圃实施芽苗移栽技术,不仅可增加苗木产量,提高苗木质量,降低生产成本,提高效益,同时还避免播种育苗过程中鼠、鸟等危害。芽苗移栽育苗技术的关键,一是芽苗的培育,二是芽苗的移栽     

新疆枣苗嫁接后的管理技术要点

嫁接苗的培育主要应抓好三个环节,一是砧木的繁育,二是苗木的嫁接,三是接后的管理。三个环节环环相扣,前后相连,若一个管理环节出现问题将导致整个嫁接苗培育工作的失败。     

木荷芽苗切根移栽育苗技术

木荷是我省造林的主要阔叶树种，木荷芽苗地奶移栽可使苗木粗壮，均匀，侧须、根发达；有利造林成活和林木速生丰产。     

印楝实生袋苗培育技术

印楝属楝科常绿乔木,是一种速生耐旱,抗逆性强的优良树种,是近年引种的一种可制造生物杀虫剂原料的树种。其种子含油量高,故不耐贮存,极易丧失生活力,如育苗技术不当,往往造成大量空袋。现介绍一种出圃率可达90%的印楝实生袋苗培育技术:1苗圃地选择印楝喜热耐旱,苗圃地应选择在光照充足,土壤肥沃,排灌及交通方便的地方。苗圃地确定后,于份根据需苗量开始装营养袋备用。营养袋规格一般为18cm×20cm,厚度达6丝以上。装袋前,把土壤中的石子及其他杂质拣净,并在袋土中均匀拌入3%～的普钙或10%的农家肥。将苗床做成高床,床宽1m,长度视地势而定;将…     

桂花芽苗移栽及苗期管理实用技术

本文根据桂花的生物学特性,结合实践经验对桂花种子的采收与贮藏、芽苗移栽及苗期管理等技术要点进行了简要介绍。     

苗木的防寒与移栽

在苗木生产过程中,苗木的防寒和移栽是两个比较重要的环节,如何抓好这两个环节是能否保证苗木良好 生长的关键。     

樟树大苗移栽方法和问题探讨

为加速绿化进程,目前大量采用樟树大苗移栽方法,主要有带枝叶带土球、截干带土球、截干裸根等移栽方法.移栽时应选择树龄较小,树干通直,没有病虫害的健壮樟树.按照移栽距离的远近采用不同的移栽方法,掌握随挖、随包、随运、随栽的原则,加强管理提高成活率.     

如何保证移植树木的成活

绿化工人都知道栽树不难,但保证树木成活却不容易。如果你还为栽了苗木怎么不爱活而犯愁,你不防对照一下,以下几点你是否做到了。     

嫁接方法、时间及捆绑材料对黄连木育苗成活率及生长的影响

为解决黄连木嫁接育苗成活率偏低和苗木生长不良的问题,2013—2015年研究分析了不同嫁接方法、时间、捆绑材料对黄连木育苗成活率及生长的影响,结果表明:4月10日的劈接、切接和腹接,接后用黑色地膜捆绑,成活率最高的是切接,高达95.8%,平均苗高161cm,平均地径1.40cm;与4月10日用白色地膜作捆绑材料的劈接、切接、腹接中成活率最高的切接相比,成活率提高14.7%、平均苗高提高19.3%、平均地径提高27.3%,为进一步提高黄连木嫁接育苗成活率和苗木生长量提供理论依据和技术参考。     

不同处理对蒙古扁桃种子吸水及幼苗生长影响

通过对蒙古扁桃种子吸水过程、幼苗生长的观测,拟合了种子的吸水模型,分析了幼苗生物量的差异.结果表明:蒙古扁桃种子吸水过程适合对数函数曲线模型,吸水率分别适合幂函数、对数函数曲线模型;50℃温水处理水平可以有效地提高带内果皮种子的吸水量和吸水速度,不带内果皮种子经过温水处理后9 h、吸水量为6.3%时种子吸水量即基本达到饱和;种子在1 h内能够大量吸水,适应荒漠强降雨环境;内果皮能够吸收一定的水分,在环境干旱时可以减轻环境干旱造成的种子失水;幼苗地上部分生物量大于地下部分,带内果皮种子育苗能够有效地增加幼苗高度和根系长度.     

Prediction of planted seedling survival of five Mediterranean species based on initial seedling morphology

Field performance can be predicted by evaluating nursery stock quality, but optimal morphological variables for use in these assessments may vary by species especially under dry Mediterranean conditions. Our objective was to identify initial seedling morphological characteristics that successfully predict field performance of five Mediterranean species (Pinus halepensis, Quercus ilex, Quercus coccifera, Ceratonia silqua and Pistacia lentiscus). Container seedling morphology was evaluated following the nursery phase, and then seedlings were outplanted in the field where field survival was monitored for two successive years. Results indicate that survival can successfully be predicted from seedling initial morphological characteristics for all these species, yet not all the initial characteristics were good predictors. Survival of P. halepensis and Pist. lentiscus seedlings was positively correlated to initial seedling root-collar diameter, total dry weight and Dickson’s quality index, and can be reliably predicted by these variables. In contrast, seedling field survival of the two Mediterranean evergreen oak species was correlated with few initial morphological attributes; initial diameter provided an accurate index to predict second-year outplanting survival for both species while height/diameter was a good survival predictor for Q. coccifera seedlings. For C. siliqua seedlings, seedlings with larger initial diameter and total biomass survive better in the field. Thus, diameter was the common variable that accurately predicted survival for all species, which should be >5 mm for P. halepensis seedlings and >7 mm for the remaining species.     

提高裸根苗造林成活技术

本文总结了敦化市林业局多年造林经验,介绍了适地适树、选择优良苗木、规范整地、精心栽植、造林地管护等造林技术。在影响造林成活率诸多因素中,造林地条件、苗木选择、整地挖坑质量、栽植技术和栽植后抚育管护尤为关键。     

铁刀木育苗技术研究

对铁刀木种子进行五种不同的浸泡处理后,分别用河沙和山基土作为基质进行催芽,结果表明:用山基土做基质发芽率高于用河沙做基质;在两种基质中平均出芽率处理A2＞处理A4＞处理A3＞处理A5＞处理A1;用河沙作基质时,A3处理出芽率最高,其次为A2、A1、A5,出芽率最低的为处理A4;用山基土作基质时,A4处理出芽率最高,其次为A2、A5、A1,出芽率最低的为A3处理;出芽时间为处理A2(3d)＞处理A3、处理A4(5d)＞处理A1(6d)＞处理A5(7d).     

移植基质对枣组培苗移植成活率的影响

应用林木果树繁殖中心组培技术，获得的枣树试管组培苗，选择塑料大棚自动弥雾技术，给移植苗适宜的环境，采用不同的移植基质进行试验，成功地为生产应用获得大量大量枣无病毒苗。     

Dynamics of seedling establishment and survival in uneven-aged boreal forests

The aim of this study was to describe the dynamics of seedling establishment and development in spruce-dominated uneven-aged boreal forests. The study was based on empirical data from 15 stands with permanent plots, which had been intensively monitored for 10 years in southern Finland. All trees (height > 1.3 m) were measured every fifth year. Regeneration was measured on 64 permanent sample plots (4 m²) in each stand. The establishment of first-year seedlings was analysed on a yearly basis. The survival and development of older Norway spruce (Picea abies (L.) H. Karst.) seedlings were analysed based on observations made every five years. The establishment of spruce seedlings was closely correlated with the abundance of seed crops. Seedling cohorts originating from abundant seed crops were clearly detectable in the development of seedling height distributions over time. It took about 15 years for spruce seedlings to reach a height level of 15-30 cm. Local basal area had hardly any effect on the emergence or survival of small spruce seedlings, while the number of higher spruce seedlings decreased with increasing local basal area.     

绿化大树冬季移植成活率的调查与分析

以近几年长春市典型绿化工程项目为对象,对冬季大树移植成活率进行调查与分析,结果表明:不同移植时间成活率差异明显,最适宜时间为2月中旬至4月中旬,成活率可达到85%;长时间风吹日晒、土壤透风导致树体水分失衡,以及树龄大不易再生新根而影响吸收功能,是导致北方干寒地区冬季大树移植成活率不高的主要因素。维持树体水分平衡、适当修剪树冠、清除土坨稻草绳包装、根系切口喷施生长素可有效提高成活率。     

进城大树成活率低的原因分析及对策研究

大树引入城市是改变城市生态环境、提高城市绿化绿地质量、生态效益和景观的有效途径。本文分析了进城大树成活率低的原因，提出了提高大树成活率的对策。