紫叶小檗垄作和床作播种育苗技术

文章根据多年从事紫叶小檗的育苗经验,详实地总结了紫叶小檗垄作和床作播种育苗的技术。垄作播种适宜于丘陵坡地育苗,床作适宜于平地育苗,可依据地形和坡度选择适宜的播种方式。该项技术可作为绿化育苗的参考。     

黄波椤播种留苗密度与苗木质量关系研究

通过对黄波椤播种育苗留苗密度与苗木质量关系的研究,结果表明:黄波椤播种育苗留苗密度对苗高生长量影响较小,对地径生长量和总生物量影响较大;在垄作和床作播种育苗中以70~90株m~(-2)为适宜;床作育苗较之垄作育苗生长量大。     

枣树归圃育苗技术

枣树归圃育苗技术河南省新郑市良种枣苗科研所一、枣树归圃育苗方法育苗步骤：作床：深耕２０厘米，施足有机底肥，豫南多雨，多做成高床；豫北和郑州地区，以低床为宜。床的宽窄因育苗行数而定，一般每畦育苗２行，畦宽９０厘米，畦长１０米，畦向南北，以利受光，畦的一...     

水曲柳山地垄作与平床育苗生长效果试验初报简

在甘井子林场进行了水曲柳（Fraxinus mandschurica）山地育苗垄作与平床育苗生长效果的对比试验,结果表明：垄作育苗当年平均苗高83 cm ,地径0．96 cm ,主根长38 cm ,侧根长27 cm ,侧根平均7条,均高于平床育苗;垄作育苗和平床育苗在生长量、地径粗度和侧根数量上形成明显的差异;垄作育苗由于根茎粗壮,侧根条数多,当年造林成活率和造林保存率均比平床育苗成效显著,均构成了显著差异。山地垄作育苗效果要明显好于平床育苗效果。     

沙棘播种育苗技术

沙棘为胡颓子科沙棘属落叶灌木或小乔木,是优良的沙生植物树种,其造林后的抗旱性优于其它抗旱树种,其育苗技术包括：整地、作床（搂畦）、种子处理、播种、苗期管理、出圃（起苗）等。     

桐辣一床育苗技术

泡桐、辣椒于一床育苗,提高了土地利用率,节省了建床管理和费用,提早了泡桐育苗时间,可使达到全苗壮苗,较大地增加了经济效益。 选择地平、土肥、水近的地块作苗床,一般畦宽1.3米,畦长视地形、需苗量而定,畦塄宽50厘米,施足有机肥及喷杀虫灭菌农药后深翻,打碎土块,达到塄坚床平,辣椒最佳播种时间:关中地区三月十五日前后,播后搭     

“百日红”夏季扦插育苗技术

“百日红”夏季扦插育苗技术１．整地作畦。选择排水良好地块，施足底肥，深翻整平，做成长１０ｍ、宽１ｍ、高２０～２５ｃｍ的畦床。２．选择插穗。选择生长发育良好，且已木质化的枝条（其上生出二次技或形成花蕾），剪成长１５～２０ｃｍ，上口平、下口马耳型的掐穗备...     

一年半生白柠条苗育苗技术

白柠条是“三北”地区防风固沙、水土保持的优良灌木树种。它不仅抗逆性强,而且有较好的利用价值。赤峰市北部地区培育的一年半生白柠条苗,适应性强、成活率高,优于一年或二年生的苗木造林,白柠条从直播造林到植苗造林,由使用一年生苗木(春季育苗,5月上旬播种)到使用一年半生苗木(夏季育苗,8月上中旬播种),不仅苗齐苗壮,且造林成活率明显提高,效果显著。1.苗圃地的选择、整地、作床苗圃地的选择:白柠条育苗应选择地势平坦、有灌溉条件、通透性好的土壤。整地:春季或初夏整地,深翻20cm左右或播前整地,并进行耙压。作床:有喷灌条件的,应该作床…     

落叶松冬播育苗技术

落叶松冬播育苗与春播育苗相比,平均早齐苗12天左右,苗高增加17%,地径增加13%,成苗率提高17.8%,立枯病降低11.6%,公顷多创产值3147.50元,并能缓解春播育苗时间紧、任务重、劳动力紧张的矛盾.落叶松冬播育苗技术与春播育苗有许多相同之处,但也有特定的技术要求,现介绍如下:1.整地作床:秋季掘苗后,立即将圃     

山杏栽培技术

山杏具有抗性强、易管理、投资小、见效快的特点 ,而且杏仁又具有较高的营养价值和药用价值 ,市场供不应求 ,发展前景广阔。近几年来 ,我国北方地区发展规模较快 ,为了更好地提高山杏的产量和质量 ,创造较高的经济效益 ,在栽培管理上必须掌握以下几个要点 :1　山杏育苗技术要点1.1　苗圃地选择及整地1.1.1　选地 :选地应注意以下几点 :(1)选择光照充足 ,地势平坦的好地 ;(2选择便于管理 ,有浇灌条件的地方 ;(3)要避开前茬是杏、桃或李的育苗地。1.1.2　整地 :育苗地先要进行深翻 ,作畦 ,施足底肥。畦宽一般在 1.5m左右 (每畦种 3～ 4垄 ) ,…     

欧洲花楸引种栽培初步研究

自2000年开始先后从俄罗斯季米里亚泽夫农学院的试验站引进欧洲红果花楸苗木,当年定植在苗圃试验地,之后进行了嫩枝扦插、组培繁殖,对其生物学特性、生长节律、栽培技术等进行了系统研究。结果表明,欧洲红果花楸在辽西地区具有很强的适应性,生长迅速,开花结果正常。嫩枝扦插和组培育苗经归圃培育后平均苗高30cm以上,成活率80%,8年生树高4.1 m,地径6.7 cm,单株果实产量4.0 kg,产果量5.0 t.hm-2。同时,花朵优雅夺目。果实为红色,鲜亮持久,可挂到冬季,引人注目,可美化城市、改善环境。     

水黄皮苗期生长特性和育苗技术研究

为增加沿海造林树种,丰富沿海防护林种质资源,引进台湾防护林树种水黄皮种子并在惠安赤湖林场苗圃育苗。通过对水黄皮物候和苗期生长特性的观测,研究了水黄皮苗木年生长规律和生长期,结果表明:水黄皮播种后,苗木高、径生长过程表现为慢—快—慢的节律;6—10月为高、径的快速生长期,生长量分别为全年生长量的34%和50.74%。同时提出了水黄皮的育苗技术。     

闽楠容器育苗基质筛选及大田育苗富根壮苗试验

闽楠容器育苗基质筛选及大田育苗富根壮苗试验结果表明:闽楠容器育苗基质最佳配方为泥炭土∶黄心土∶腐熟有机肥∶钙镁磷肥=70∶20∶5∶5。不同浓度GGR6叶面喷施处理后的闽楠大田苗,其苗木根长5 cm的Ⅰ级侧根数、苗高生长、地径生长均有显著差异。考虑到成本因素,宜采用20 mg/L GGR6液连续喷施苗木叶面3次,可使苗木5 cm的Ⅰ级侧根数比对照增加80%以上,苗木高生长比对照增加25%以上,苗木地径生长比对照增加15%以上。     

Effects of site preparation and fertilizer application at planting on Eucalyptus tereticornis at Morogoro,Tanzania

Uniform nursery stocks of Eucalyptus tereticornis were used to establish an experiment factorially combining site preparation (three levels—bedding; disking; neither bedding nor disking), initial nitrogen applications (two levels—75 g ammonium sulphate per plant; 0 g ammonium sulphate per plant) and initial phosphorus applications (150 g triple super phosphate per plant; 0 g triple super phosphate per plant).Monitoring was carried out for 2 years by which time trees were up to 3.2 m tall and 5.0 cm in diameter at the root collar. Survival at 2 years was significantly higher among plants that had received nitrogen (65%) than those which had not (53%) and among plants on disked or bedded sites (62%) than those on unworked soil (53%). Monthly height increment was briefly, but significantly, increased in plants supplied with additional nitrogen and further enhanced if there was also additional phosphorus. Monthly diameter increment was, over most of the 1st year, significantly greater on sites prepared by bedding; significant increases also resulted, though for more restricted periods, from site preparation by disking and from provision of additional nitrogen. At the end of 1 year significantly higher concentrations of foliar potassium, suggesting enhanced drought hardiness, were detected for plants on bedded or disked ground. The concentration in these was 1%; on unworked ground the corresponding value was 0.8%. Combining bedding or disking with an initial application of nitrogen offset this effect.The short period over which growth benefits from the site preparation and nitrogen application treatments is noted but it is stressed that initial growth encouragement is desirable with Eucalyptus and that overall benefits, as an improved survial, may be long term. The value of phosphorus applications under the prevailing conditions is considered unproven.     

干旱荒漠区不同生根剂对沙地饲料桑硬枝扦插育苗生根的影响

根据沙地饲料桑的生态学特性和生长特性,针对酒泉市开展沙地饲料桑育苗存在的许多问题,采用不同处理措施,进行了沙地饲料桑硬枝扦插育苗试验。结果表明,ABT生根粉、NAA和IBA等3种植物生长调节剂中,质量分数为100×10-6的ABT处理最适合沙地饲料桑的扦插繁殖,成活率为85.5%;质量分数为300×10-6的NAA处理效果次之,成活率成为83.4%;质量分数为300×10-6的ABT处理效果最差,成活率为67.2%。     

GGR在欧美108杨扦插育苗上的应用试验

采用绿色植物生长调节剂GGR进行欧美108杨扦插育苗试验,结果表明,GGR6号和GGR10号500mg·kg-1处理插穗,均能有效促进欧美108杨的地径和高生长,提高了成活率,各处理间苗高、成活率差异达显著水平,地径达到极显著水平,但以GGR6号效果最好,高生长比对照增加17.6%,地径生长较对照增加34.5%,扦插育...     

Pine growth response to different site-preparation methods with or without post-plant herbaceous weed control on North Florida's Lower Coastal Plain

A study was initiated in 1994 to evaluate the effects of bedding timing and frequency and pre-plant herbicide application, with and without post-plant herbaceous weed control, on growth of three slash pine (Pinus elliottii Engelm.) plantations and one loblolly pine (Pinus taeda L.) plantation on flatwoods sites. Site preparation treatments included early bedding alone, late bedding alone, double bedding, early bedding plus banded pre-plant herbicide, and early bedding plus broadcast pre-plant herbicide. Each site preparation treatment was tested with and without a first-year post-plant herbicide application for herbaceous weed control (HC). Results ranging from age 5 to 11 are reported, depending on installation. Pine growth following late bedding alone was similar or greater than that with early bedding alone. Double bedding did not consistently increase pine growth as compared with single bedding alone. Early bedding plus either broadcast or banded pre-plant herbicide application generally exhibited greater pine growth than did bedding alone treatments or bedding plus post-plant herbaceous weed control treatments. Broadcast pre-plant herbicide application resulted in similar or greater growth than banded pre-plant herbicide application. Post-plant herbaceous weed control improved loblolly pine growth across all site preparation regimes on the one test location. For slash pine plantations evaluated, post-plant herbaceous weed control resulted in significant growth increases on some but not all sites. The differences in growth response to bedding and pre- and post-plant herbicide applications are discussed in relation to treatment efficacy in controlling woody shrub and herbaceous competing vegetation. Effective bedding and chemical site preparation reduces the need for post-plant herbicide applications for slash pine on certain sites. Good site preparation, including the application of herbicides for competition control, is essential for fast growing slash and loblolly pine plantations in the flatwoods.     

立地条件对落叶松人工林生长的影响

通过对日本落叶松(Larix kaempferi)人工林在不同立地条件下的生长调查,结果表明,日本落叶松在生长过程中,受土层厚度、林地位置、立地指数等多方面因素的制约:厚层土胸径年生长量比中层土和薄层土高9.2%～26.7%,树高年生长量高21.8%～44%;生长在N坡,坡度较缓、山地下腹为优;在不同的立地指数级中,生长差异明显,18以上指数级比14～18指数级胸径生长量高25.4%,比14以下指数级胸径生长量高33.8%,树高生长量,18以上指数级比14～18指数级高26.7%,比14以下指数级高36.3%。培育日本落叶松人工林,选择优质立地条件不但可提高林木的生长速度,又能促使林木优质高产。     

Modified exponential nitrogen loading to promote morphological quality and nutrient storage of bareroot-cultured Quercus rubra and Quercus alba seedlings

Abstract

Exponential nutrient loading has been used to improve nursery fertilizer uptake efficiency of conifer seedlings, but the technique has received little attention in the culture of temperate deciduous hardwoods. This study examined responses of northern red oak (Quercus rubra L.) and white oak (Q. alba L.) seedlings to modified exponential nitrogen loading during bareroot nursery culture using a broad range of nutrient supply from 0 to 3.35 g nitrogen (N) per plant per season for 18 weeks in Indiana, USA. Seedling growth and nutritional parameters followed a curvilinear pattern that ranged from deficiency to toxicity with increased fertilization consistent with trends depicted in the proposed model for nutrient loading. Fertilization increased plant dry mass by 113–260% for red oak and 49–144% for white oak. Severe nutrient deficiency occurred under indigenous soil fertility, and limited phosphorus and potassium uptake were found to inhibit seedling growth at higher N supply. The sufficiency and optimum rates were determined to be 0.84 and 1.68 g N per seedling per season, respectively, under the current cultural conditions. Fertilization at 1.68 g N per plant increased N content by 40% in red oak and 35% in white oak. This approach may be used to help refine nursery fertilization practices in hardwood culture to produce high-quality seedlings for field planting.