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湖南省木材参考销售价格注：1、价格为缴清税费的火车站交货待运价杉原条杉原木松原木杉板坊材6m以上×8cm8m以上×10~12cm10m以上×14~16cm12m以上×18cm12m以上×20cm以上2m~2．６m×10~12cm2m~2．６m×14cm2m~2．６m×16cm2m~2．６m×18cm2m~2．６m×20cm2m~2．６m×22cm2m~2．６m×24~26cm2m~2．６m×28cm以上2m~2．６m×10~12cm2m~2．６m×14~18cm2m~2．６m×20~26cm2m~2．６m×28~38cm2m~2．６m×40cm以上4m×10cm×5cm4m×5cm×4cm4m×3cm×4cm2~2.6m×10cm×5cm2~2.6m×5cm×4cm2~2.6m×4cm×3cm怀化440480540580720450490520660770…     

江洲滩地杨树造林关键技术研究

通过总结联合国粮农组织援建的“中国东部暖温带杨树丰产林”经验,认为江州滩地杨树造林关键技术是造林时间以11月至翌年2月为宜;缩小植穴口径,深栽80cm后培土至地上50cm,造林选用1、2年生苗,密度可选3m×3m,3m×4m,4m×10m或者4m×4m,造林前需清除芦苇。     

西南桦造林密度与林木生长的关系

西南桦不同密度6a的试验结果显示:西南桦属速生树种,人工林初期生长很快,树高生长(1　5年生)达1 22　1 90m,胸径生长(3　6年生)达1 12　2 91cm。密度对树高生长有影响但不显著,而与胸径生长呈显著负相关。最大和最小密度林分间平均胸径相差2 88cm,3m×3m林分比1 5m×2m林分林木生长量高32 3%,比2m×2m林分高28 4%,比2m×3m林分高11 6%;单株材积生长与密度亦呈负相关关系,其关系式可用V=ax-b来表示。而林分蓄积则与密度呈正相关关系,即密度大林分蓄积量高,反之则小。随林龄增长,不同密度林分间蓄积差异逐渐缩小。要培育中大径材的西南桦人工林,造林密度不宜大,可考虑采用2m×3m及3m×3m的株行距。     

木材价格信息

材种规格价格(元)材种规格价格(元)江永双牌浏阳江永双牌浏阳杉元条8m以上×12cm400380370杉元木2m×22cm7105808m以上×14cm4203904002m×24cm7606008m以上×16cm4504204202m×24cm8206508m以上×18cm490460540松元木4m×12cm3903608m以上×20cm5405004m×14cm4103805~6m×8cm3204m×16cm4304005~6m×10cm3504m×18cm460420杉元木4m×8cm4404604m×20cm4904504m×12cm5504904m×22cm5104704m×14cm5605004m×24cm5404904m×16cm6005304m×26cm5705104m×18cm6305604m×28cm6105404m×20cm6806004m×30cm6605802m×14cm530480松元木2m×12~1…     

巨桉短周期工业用材林培育技术研究

针对不同的土壤类型、整地、造林密度、施肥等栽培、管理措施分析,表明栽培巨桉应选择中厚层山地黄壤、整地规格为60cm×60cm×60cm,重施基肥和追肥、造林密度为1667株/hm2,即株行距为2m×3m.在轮伐期为6-8年时,其经济效益是同等立地条件下马尾松林分经济效益的3.5倍.宜在巨桉适生区大力发展.     

山旱区柠条播种造林技术

整地。荒坡丘陵地(坡度大于30°)主要采取沿等高线布穴挖鱼鳞坑整地方式,规格一般为40cm×20cm×30cm,鱼鳞坑的土埂高20cm。每亩挖穴一般为167～222穴。平坦荒地不需要提前整地,播种时按2m×1.5m或2m×2m的株行距品字形布穴,坑穴规格15cm×15cm×10cm。退耕地在播种的前一年进行全面整地,机耕深度要达到30cm左右。种子的选择和处理。用于造林的柠条种子应选择饱满、均匀、具有光泽且颜色呈黄绿色或米黄色无病虫害的种子,千粒重需要达到35g以上。为了促进发芽、减少鼠害,播前用30℃水浸种12～24小时,捞出后用10%的磷化锌拌种。造林时间。只要…     

白林二号杨壮苗造林试验报告

试验采用的是白林二号杨树良种和4种处理(1.5m×0.5m、1.0m×0.5m、0.5m×0.5m、0.25m×0.5m)培育钓Ⅰ、Ⅱ、Ⅲ和Ⅳ四个等级的苗木。试验结果表明采用Ⅰ级苗木营造的6年生试验林每公顷立木蓄积比Ⅳ级的增产65.1129m~3,增加经济收入9115.8元。     

用不同株行距栽植107杨的对比试验

在科技园区对107杨分别以2 m×2 m、2 m×3 m、2 m×4 m、3 m×5 m不同株行距进行了对比栽植试验,试验结果表明,株行距以2 m×4 m生长最好,株行距3 m×5 m最适合林农间作。     

怀化市5月份林产品市场行情

规格5m以上×8~12cm5m以上×14~16cm5m以上×18cm以上4~6.8m×8~12cm4~6.8m×14~16cm4~6.8m×18cm以上2~3.8m×20~28cm2~3.8m×30cm以上2~3.8m×20~28cm2~3.8m×30cm以上2m×12~18cm1~3级4~7级2.5m×6cm各种规格1220mm×2440mm×16mm1220mm×2440mm×12~15mm1220mm×2440mm×3~5mm1220mm×2440mm×10mm板坯600(900)mm×90(75)mm×18(15)mm一级优级杉棒锯材木胶合板中密度纤维板硬质纤维板竹胶合板木地板竹地板松香松节油品名松原木杂原木坑木间伐木价格480元/m3520元/m3580元/m3550元/m3600元/m3700元/m3550元/m3720元/m3660元/m3860元/m336…     

华北地区沙兰杨密度试验研究

对华北地区6年生沙兰杨丰产林测试分析表明,不同造林密度4年生时胸径、材积及高径比差异显著;林分结构亦有不同分化,3m×6m的集中分布在16～18cm径阶,4m×6m的集中分布在18～20cm,6m×6m的则集中在20～22cm,且这种差异逐年增大。3m×6m密度林分4年生时达到国家檩材林的标准,6m×6m的6年生时达到柁材标准。     

不同密度三倍体毛白杨试验林土壤养分的动态变化

以三倍体毛白杨不同密度试验林为研究对象,采用随机区组试验设计研究了4 a生长期内5个不同密度(2 m×2 m、2 m×3 m、2 m×4 m、2 m×5 m和3 m×4 m)试验林的0 20、20 40、40 60 cm土壤层次的理化指标(pH值、有机质、全N、碱解N、全P、有效P、全K和速效K含量),结果表明:(1)4 a生长期内,三倍体毛白杨各密度试验林3个土层的pH值均增加,尤其是低密度(3 m×4 m)试验林增幅最大,且随土层加深碱性增强。(2)各密度试验林3个土层有机质含量呈先降后升的变化,高密度(2 m×2 m、2 m×3 m)试验林有机质消耗量显著比其它密度的大。(3)土壤全P和有效P含量呈先升后降的变化特点,高密度(2 m×2 m)试验林有效P消耗量显著比其它密度的大。(4)高密度(2 m×2 m)试验林土壤碱解N含量增幅显著;中、低密度(2 m×4 m、3 m×4 m)试验林土壤速效K含量降幅显著;其它养分指标无明显变化规律。     

珍稀树种南方红豆杉造林技术试验

通过试验研究不同造林株行距（A）、不同整地挖穴规格（B）对南方红豆杉人工造林成活率、幼林高度及地径生长量的影响差异,试验结果表明：2.0 m×2.5 m造林株行距（A）＋60 cm×50 cm×40 cm整地规格（B）最好,1年生幼林平均成活率达95.6%。     

Characteristics of soil water consumption of typical shrubs (Caragana microphylla) and trees (Pinus sylvestris) in the Horqin Sandy Land area, China

Reforestation is one of the most effective ways to reduce the impacts of desertification. Caragana microphylla Lam. and Pinus sylvestris var. mongolica Litrin have been widely used to stabilize shifting sands in the Horqin sandy land area since the 1980s. However, soil water depletion has been of major concern in C. microphylla and P. ongolica plantations and in many places current soil moisture cannot meet the demand of growing plants. To determine the water budget of C. microphylla and P. mongolica plantations, we studied the effect of plantations on soil moisture and assessed the evapotranspiration in plantations of both species. Investigations were conducted at a fenced plot at Wulanaodu (42°29′N, 119°30′E, 479 m a. s. l), located at the western edge of the Horqin Sandy Land area in Inner Mongolia, northern China. Five year old C. microphylla and seven year old P. mongolica plants were selected from the plantations and transplanted to iron boxes (400 cm×200 cm×120 cm) which can drain extra water. Plant spacing of 1 m×1 m was applied to P. mongolica, and two plant spacings of 1 m×1 m and 1 m×2 m to C. microphylla. The transplanted plants grew for two years in the boxes. Soil moisture from soil surface to a depth 80 cm were measured at 20 cm intervals in boxes every 10 d (2004) or 3 d (2005) during the growing season with a TDR water meter. The evapotranspiration was estimated from a mathematical formula and the characteristics of soil water consumption and evapotranspiration of these two plantations were analyzed. The soil water of P. mongolica was more than that of C. microphylla at the same 1 m×1m spacing. The soil water of C. microphylla with the 1 m×2 m spacing was more than that of the 1 m×1 m spacing. The evapotranspiration ranged from high to low as follows: C. microphylla (1 m×1 m), C. microphylla (1 m×2 m) and P. mongolica (1 m×1 m) during the growing seasons. The evapotranspiration of individual plants ranging from high to low was C. microphylla (1 m×2 m), C. microphylla (1 m×1 m), and P. mongolica (1 m×1 m) during the growing season. C. microphylla grown for five year consumed more water than P. mongolica grown for seven years at the same spacing. __________ Translated from Acta Ecological Sinica, 2008, 28(5): 1981–1990 [译自: 生态学报]     

Effects of clump spacing on nutrient distribution and root activity of <Emphasis Type="Italic">Dendrocalamus strictus</Emphasis> in the humid region of Kerala,peninsular India

The humid agroclimatic conditions of Kerala, India permit the cultivation of an array of bamboo species of which Dendrocalamus strictus Roxb. (Nees.) is an important one on account of its high growth rate and multiple uses. Stand density, a potential tool in controlling the productivity of woody ecosystems, its effect on growth and root distribution patterns may provide a better understanding of productivity optimization especially when bamboo-based intercropping options are considered. Growth attributes of 7-year-old bamboo (D. strictus) stands managed at variable spacing (4 × 4 m, 6 × 6 m, 8 × 8 m, 10 × 10 m, 12 × 12 m) were studied. Functional root activity among bamboo clumps were also studied using a radio tracer soil injection method in which the radio isotope ³²P was applied to soil at varying depths and lateral distances from the clump. Results indicate that spacing exerts a profound influence on growth of bamboo. Widely spaced bamboo exhibited higher clump diameters and crown widths while clump heights were better under closer spacing. Clump height was 30% lower and DBH 52% higher at the widest spacing (12 × 12 m) compared to the closest spacing (4 × 4 m). With increasing soil depth and lateral distance, root activity decreased significantly. Root activity near the clump base was highest (809 counts per minute, cpm; 50 cm depth and 50 cm lateral distance) at 4 × 4 m. Tracer study further showed wider distribution of root activity with increase in clump spacing. It may be concluded that the intensive foraging zone of bamboo is within a 50-cm radius around the clump irrespective of spacing. N, P and K content in the upper 20 cm was 2197, 21, and 203 kg/ha respectively for the closely spaced bamboo (4 × 4 m) which were significantly higher than corresponding nutrient content at wider spacings. About 50% of N, P and K were present within the 0–20 cm soil layer, which decreased drastically beyond the 20 cm depth. The results suggest that stand management practices through planting density regulation can modify the resource acquisition patterns of D. strictus which in turn can change growth and productivity considerably. Such information on root activities, spatial and temporal strategies of resource sharing will be helpful in deciding the effective nutrition zone for D. strictus. Further, the study throws light on the spatial distribution of non-competitive zones for productivity optimization yields, especially when intercropping practices are considered.     

桤木生物量及根系分布规律

采用全部、分层挖取法,研究洞庭湖区9年生桤木人工林的生物量及根系分布规律。结果表明：桤木单株生物量为44.39ks／株,各器官生物量大小排序为树干〉树根〉树枝〉树皮〉树叶;林分总生物量为96.06/hm^2;林分净生产力为10.67/（hm^2·年）。桤木根系发达,根深60～80cm;根系中以根桩和粗根的生物量所占的比例最大,两者之和占根系总生物量的84.27％。在垂直分布上,根系主要分布在0～40cm的土层中,其生物量占根系总生物量的84.51％。在水平分布上,根系主要分布在离树桩0～50cm的范围内,其生物量占根系总生物量的84.49％;特别是粗根,其生物量占根系总生物量的29.47％;茵根的生物量占根系总生物量的0.39％,主要分布在离树桩50～100cm的范围内,该区域根系的生物量占茵根总生物量的70.97％。     

嫩江沙地几种植物根系垂直分布的研究

采用全部分层挖取法研究了银中杨(Populus alba×Populus berolinensis)、沙棘(Seabuckthorn)、沙枣(Elaeag-nus angustifolia)和山杏(Prunus arm eniaca)4个树种的根系分布情况。结果表明:各树种之间根系的垂直分布差异显著,银中杨根系在0～120 cm土层中均有分布,林龄越大分布越深,但主要集中在0～40 cm的土层中,而且以直径小于7 mm的根系为主;沙棘根系分布较浅,在0～30 cm土层中,分布相对均匀;沙枣根系分布最深仅达20 cm;山杏的根系分布虽可达130 cm,但主要还是集中在10～50 cm土层中。根系总量分布由大到小依次是银中杨、沙棘、沙枣、山杏。     

无土层河滩地营造杨树速生丰产林试验

通过对无土层河滩地不同整地规格、客土等方法营造杨树丰产林试验，结果表明，在无土河滩地上，当地下水位在1～2．5m时，挖1m×1m×1m大坑整地，客土填抗、深栽、选择耐旱性和抗逆性强的小钻杨，营造的林分能够达到丰产标准。     

闽南山地桉树造林株行距配置效应研究

对巨尾桉、尾叶桉 3种株行距配置造林试验研究表明 ,在同为 16 6 5株·hm-2 造林密度的情况下 ,不同株行距配置对林分生长、抗逆性、林内光照强度、林下凋落物及林地土壤肥力的影响有所差异。闽南山地造林采用 2m× 3m或 1 5m× 4m的配置并按“品”字型排列植穴所形成的营养空间较为合理 ,有利于林分生长和地力维持 ;而 1m× 6m的配置 ,表现出风折木多、林下植被旺盛、枯枝落叶量少、土壤养分含量少及林分生产力低等特点。     

意大利214杨合理造林密度的选择

依据17龄意大利214杨随机区组设计的不同密度,根据树高和胸径生长量用林业统计软件进行蓄积计算,用不同密度下的立木蓄积量来确定最佳的造林密度。试验结果表明,4m×6m试验密度尽管单株蓄积不是最高的,但公顷蓄积是最大的,为260．74m^3·hm^-2,该密度林分林木符合大径材标准的株数最多,为87株。因此4m×6m密度是较为丰产的最佳密度。     

整地深度对土壤物理性质的影响

通过不同整地深度对土壤物理性质的影响研究,结果表明:深整地空白处的土壤含水率较对照空白处提高0.46个百分点;深整地较浅整地土壤垂直温度变化小,在0~70 cm范围内,每深10 cm,浅整地地温下降1.0 ℃,而深整地的下降0.9 ℃;深整地较一般整地土壤容重减小11%,土壤孔隙度增加5.5个百分点。研究结果还表明,适宜的整地深度以50~60 cm为宜,这有助于降低造林成本,提高经济效益。