镇安县油茶造林试验

在镇安县采取单因素设计,进行了不同栽植时间和整地方式对油茶栽植成活率、保存率及幼树生长量影响试验,结果为栽植时间对栽植成活率、保存率、幼树生长量均有影响,其中秋季栽植最有利,其次为初冬栽植,春季栽植效果最不好;穴状整地在成活率、保存率、幼树生长量方面的表现都优于全面整地。建议镇安县栽植油茶适宜于在秋季,采取穴状整地方式。     

黄土丘陵沟壑区刺槐造林试验研究

以品种、密度和整地方式为试验因素,采用正交试验设计方法,研究了各因素不同组合对刺槐造林成活率和苗木生长的影响。结果表明,不同品种、不同栽植密度和不同整地方式对刺槐成活率、苗木质量指标影响显著。提高刺槐造林成活率的首选培育方案为普通刺槐,栽植密度1.5 m×1.0 m,全面整地;其次为普通刺槐,栽植密度1.5 m×1.0 m,穴状整地植后扩穴。3种不同整地方式单位面积造林成本差异不大,以机耕整地造林成本最低,穴状整地栽植后扩穴成本最高。     

冀西北干旱山地不同整地方式对常用造林树种成活率及幼龄阶段生长的影响研究

通过对冀西北坝头山地不同整地方式造林后第2年造林成活率和2002～2006年生长量的调查,经分析比较,选择出最佳的造林模型为大鱼鳞坑+水平沟栽植落叶松或栽植樟子松。     

湿地松不同整地方式造林效益分析

研究了不同整地方式对湿地松生长及造林效益的影响，结果表明：不同整地方式影响到幼树的栽植当年和栽植第2年的新梢生长量、地径生长、苗木的保存率。5种整地方式中SPA方式整地后的幼树栽植当年和栽植第2年的新梢生长量和苗木保存率最高，而用SPE整地后的栽植翌年地径生长量最大。整地方式不同而导致造林成本产生显著差异。SPE和SPA整地方式总投入最高，SPC和SPD最低。     

铜山县石灰岩山地不同造林树种生长状况的比较

通过合理整地、适时造林和应用新技术等措施,选择耐旱性较强的侧柏、刺槐、苦楝在铜山县石灰岩山地造林,并分析其生长状况,结果表明：侧柏和刺槐造林平均成活率为80％以上,苦楝成活率偏低,仅59．1％;3个树种中刺槐的生长量最大,其次是苦楝,侧柏生长最慢;3个树种雨季造林与春季造林的生长量无显著差异。     

整地方式对荒山绿化植物成活率及新梢生长的影响

采用4种整地技术,分析了不同整地方式对侧柏、刺槐、花椒、枣树、沙棘、火炬树、臭椿、黄栌和油松等9个树种成活率及新梢生长的影响。结果表明:成活率和新梢生长量从高到低的顺序是:梯田整地、水平阶整地鱼鳞坑整地常规整地。在废弃煤矿绿化过程中,建议采用梯田整地和水平阶整地。     

花椒抗旱造林技术措施研究

通过正交试验表明,花椒抗旱造林技术措施最佳组合是泥浆 保水剂蘸根处理、栽植区塑料薄膜覆盖、鱼鳞坑整地,造林成活率可达到98%,第2年平均最长新梢生长量在45 cm以上,5年生花椒树平均单株产量在2.0 kg以上.     

荒山生态林营造技术研究

对济南及鲁南等地区部分荒山的造林情况进行跟踪调查研究,结果显示：在济南地区,无纺布营养杯苗、鱼鳞坑种植、多树种混交在石灰岩荒山造林方面有较好的效果;在鲁南地区,在同种育苗方式下,8个树种的成活率存在显著差异,皂荚和侧柏的成活率最高,而油松和刺槐最低;第1年栽植的侧柏树高、胸径随着苗木规格的增长,生长量逐渐增加,而新梢生长是随着苗木规格的增加,生长量反而下降;通过对两种育苗方式雨季造林的成活率和树高生长量综合评价看,裸根育苗要明显优于基质育苗。     

关于提高建昌县刺槐造林成效的探析

刺槐是建昌县造林绿化的主要树种,是该地区保持水土、防风固沙、改良土壤和四旁绿化的优良树种。为了提高刺槐的造林成活率和保存率,笔者在对刺槐从选择优质壮苗、整地、栽植、幼林抚育管理等方面做了详细的研究探索,初步取得了较为满意的成效。     

黄龙县主要造林树种工程造林模式试验

以油松、侧柏为材料,在黄龙县试验研究了穴状整地、鱼鳞坑整地、带状整地等不同整地方式以及50cm×40cm×30cm、60cm×60cm×50cm、50cm×50cm×40cm等栽植穴规格对造林成活率、保存率以及幼树生长量的影响,结果为穴状整地和50cm×40cm×30cm栽植穴规格最好,建议该地工程造林选择穴状整地、栽植穴规格50cm×40cm×30cm。     

Effects of fertilization and irrigation on American sycamore and black locust planted on a reclaimed surface mine in Appalachia

Short rotation woody biofuel plantations on reclaimed surface mines in Appalachia can diversify domestic energy supplies and facilitate the reforestation of these disturbed lands. This study examined growth, survival, biomass accumulation and allocation, and nitrogen concentrations following two growing seasons in American sycamore (Platanus occidentalis L.) and black locust (Robinia pseudoacacia L.) seedlings receiving irrigation, granular fertilization, and irrigation + fertilization compared with untreated controls. Fertilization increased basal diameter, height, and stem mass of American sycamore following two growing seasons. Increased stem production was attributed to accelerated development and not shifts in biomass allocation due to treatment. Irrigation and irrigation + fertilization treatments did not enhance growth or biomass accumulation of American sycamore. Similarly, black locust basal diameter, height, and stem mass did not differ among the treatments. Browse surveys showed that more than 76% of black locust seedlings experienced arrested or retrogressed growth due to browse; less than 3% of American sycamores were browsed. This intensive browse by ungulates, likely including reintroduced elk, may have affected growth differences among species and confounded the effects of treatments on black locust. Survival was unaffected by treatment in both species, but mean survival was greatest in American sycamore (80%) compared to black locust (58%). Per tree total nitrogen uptake was highest in fertilized American sycamore (7.9 g) and lowest in irrigated American sycamore (0.9 g). The results of our study suggest that granular fertilizer applications can accelerate seedling growth on reclaimed surface mines in the Appalachian region.     

Black locust (Robinia pseudoacada L.) clonal seed orchards in Hungary

Black locust (Robinia pseudoacacia L.) is one of the most important stand-forming tree species in Hungary and its importance is increasing in many countries. The main aim of the discussed new selection programme is to identify black locust clones with good performance and good form for setting up clonal seed orchards. As a result of selection programme 16 new black locust clones have been improved. In spring 2002 a black locust seed orchard was established with the newly selected clones. About 40% of the plants can be considered to belong to the height growth rate class 1 and 2. Hungary was the first country where micropropagated black locust planting material was used for seed orchard establishment.     

Black locust (Robinia pseudoacacia L.) clonal seed orchards in Hungary

Black locust (Robinia pseudoacacia L.) is one of the most important stand-forming tree species in Hungary and its importance is increasing in many countries. The main aim of the discussed new selection programme is to identify black locust clones with good performance and good form for setting up clonal seed orchards. As a result of selection programme 16 new black locust clones have been improved. In spring 2002 a black locust seed orchard was established with the newly selected clones. About 40% of the plants can be considered to belong to the height growth rate class 1 and 2. Hungary was the first country where micropropagated black locust planting material was used for seed orchard establishment.     

泾川县刺槐薪炭林生长状况分析

通过对泾川县刺槐薪炭林的调查研究 ,分析其生长变化规律 ,并建立林分生长和采薪收获数学预测模型 ,为生产经营提供一定的科学依据     

Effects of shelter tubes on hardwood tree establishment in western Oregon silvopastures

Honey locust (Gleditsia triacanthos), black locust (Robinia pseudoacacia), and honey mesquite (Prosopis glandulosa) are warm season forage trees with potential to efficiently share site resources with cool season pasture plants in Pacific Northwest silvopastures. Establishment of hardwood trees can be difficult, however, because of feeding damage from wildlife and livestock. This study compared establishment and growth of trees planted in 88 cm tall solid plastic shelter tubes to 88 cm tall plastic mesh tubes, used to protect trees from animal damage. Three replications were established in May 1995 for each of the three tree species on a hill pasture near Corvallis, Oregon. Initial tree survival during the first summer and winter following planting was higher in shelter tubes than in mesh tubes. At the end of the third growing season, 58% of black locust and 94% of honey locust trees in shelter tubes were still alive compared to only 14% of black locust and 47% of honey locust in mesh tubes. Few honey mesquite trees survived regardless of tube type used. Average three-year total height growth for black locust was increased by 650% and basal diameter growth by 380% within shelter tubes, while honey locust height growth was increased by 300% and diameter growth was increased by 150% compared to trees in mesh tubes. However, shelter tube trees tended to be taller relative to their diameter and had difficulty standing upright if tubes were removed. This revised version was published online in June 2006 with corrections to the Cover Date.     

北京石质山地燃料型能源树种刺槐无性系筛选

刺槐因其抗性强、生长速度快、薪材产量和热值均较高而成为许多地区的重要燃料型能源树种.针对北京石质山地优良高产燃料型能源刺槐无性系的筛选进行了较为深入的研究,从造林成活率、林木萌芽物候期、两个采薪周期树高和地径生长、两个采薪周期产薪量等方面对鲁刺12个无性系、豫刺6个无性系以及当地刺槐的差异进行了比较.研究结果表明,豫8059号、豫8033号和豫8017号等是适应北京石质山地立地条件的优质高产无性系,豫8026号、豫8062号和鲁9号也有潜力.建议在华北石质山地通过试验推广所选出的豫8059号、豫8033号、豫8017号和鲁9号等刺槐无性系,并推广其优化栽培配套技术.     

河北山地刺槐林的经营问题

山地刺槐的高径生长主要集中在前10a,20a就可达到数量成熟,此时的木材只够小径材规格。根据山地刺槐林的生长规律,将其更新年龄定为10a为宜。刺槐萌芽更新容易,及时抚育定株,保留林地枯落物,是保证其迅速恢复成林并能旺盛生长的重要措施。     

Black locust (Robinia pseudoacacia L.) clonal seed orchards in Hungary

Black locust (Robinia pseudoacacia L.) is one of the most important stand-forming tree species in Hungary and its importance is increasing in many countries. The main aim of the discussed new selection programme is to identify black locust clones with good performance and good form for setting up clonal seed orchards. As a result of selection programme 16 new black locust clones have been improved. In spring 2002 a black locust seed orchard was established with the newly selected clones. About 40% of the plants can be considered to belong to the height growth rate class 1 and 2. Hungary was the first country where micropropagated black locust planting material was used for seed orchard establishment.     

窄冠刺槐无性系根段扦插育苗研究

刺槐(Robinia pseudoacacia L.)因其木质坚硬,色泽纹理美观,耐磨耐腐蚀,抗弯抗压及抗剪强度高,是制造地板、家具等产品的优质木材[1]。我国从20世纪70年代开始对刺槐进行遗传改良,先后在次生种源选择、优良无性系选育等方面做了大量研究[2-5],选育出了一大批生长表现良好的优良无性系[6-7],特别是于2002年在河南省选育的窄冠刺槐优良无性系,生长快,主干通直圆满,分枝角度小,托     

刺槐萌条与根系年龄不同组合对林分结构及生物量的影响

探讨了萌条年龄与根系年龄的不同组合，对刺槐薪炭林结构和生物量的影响。结果表明，未割柴林分的萌条密度、平均高度、平均地径、叶面积指数、生物量和生产量，均随年龄增长而增加。割柴后萌生的林分，萌条数量增长缓慢，其余指标均呈下降趋势。随萌条与根系年龄差距的加大，下降的趋势愈加显著。