我国木片生产的发展与展望   总被引：2，自引：1，他引：2  

周新年 《林业建设》1995,(6):23-30

本文对我国木片生产的发展历史进行了扼要回顾，对国内外木片生产现状进行了分析与评述，结合我国国情及国外木片生产的发展趋势，对我国木片生产提出决策，并展望了我国木片生产的发展前景。  相似文献   

浙江省银杏生产的现状和对策   总被引：3，自引：0，他引：3  

包振阳  陈连荣 《浙江林业科技》1997,17(6):61-64

分析了浙江省银杏资源及其开发利用现状的基础上，揭示了发展银杏的优势和有利条件，以及银杏生产的存在问题，提出了发展银杏生产的对策和措施。  相似文献   

The propagation of Ramón (Brosimum alicastrum Sw.; Moraceae) in Mayan homegardens of the Yucatan peninsula of Mexico     

Gillespie  A.R.  Bocanegra-Ferguson  D.M.  Jimenez-Osornio  J.J. 《New Forests》2004,27(1):25-38

In the Yucatan peninsula of Mexico, Maya natives have been propagating important species for centuries. However, little documentation exists of these methods, and traditional knowledge is fading as younger generations seek work in urban centers. With growing interest in using some of these species for plantation-scale production, this knowledge should be captured to aid in propagation and cultural methods of selected species. One such species, Ramón (Brosimum alicastrum Sw.), is grown in Mayan homegardens primarily as a source of dry season forage. We conducted a survey of Mayan families in several municipalities to determine basic propagation habits and procedures for cultivating Ramón, and used this information to conduct some controlled-environment studies of reproductive ecology of the species. Our survey showed that all or most Maya grow the Ramón tree in homegardens for forage and that the tree is both cultivated from wild seedlings as well as planted on a small scale. Propagation is by seed and young seedlings are irrigated until they are established. We examined the effects of temperature on seed germination and found that maximum germination occurred between 27° and 38 °C, with best germination and growth of healthy seedlings at 33 °C. No germination occurred below 21° or above 44 °C. Simulated Maya irrigation gave a four-fold increase in growth rate of seedlings, aiding early establishment. Watering gave seedlings of greater biomass, greater stem and root length, and greater numbers and size of leaves. This magnitude of response may provide an economic return for plantation culture of Ramón for forage production.  相似文献   

石膏纤维板生产技术     

金艳春  孙立人 《林业科技情报》2003,35(2):61-61

本文从产品性能,应用范围及生产特点等方面将石膏纤维板与传统的湿法纤维板、纸面石膏板进行了对比,并简要介绍了石膏纤维板的生产技术与市场前景。  相似文献   

Refining a previous analysis of the economics of a eucalyptus/agricultural crop combination     

P. J. Maille 《Agroforestry Systems》1991,14(2):145-148

When evaluating the economics of a joint production agroforestry system two rules should be followed: (1) all benefits and costs need to be included and (2) revenue streams over time should be compared using the net present value of an infinite set of rotations. To illustrate both points, previously presented data on the economics of eucalyptus plantings around agricultural fields are reevaluated below.  相似文献   

油棕丝纤维板热磨机螺旋进料器的设计分析     

杨琼 《林业机械与木工设备》2006,34(4):21-23

介绍了油棕丝的特点、油棕丝螺旋进料器主要参数的计算及关键元件的设计分析。  相似文献   

加速数控机床开发全面实现家具现代化生产   总被引：1，自引：0，他引：1  

李军  李志仁  张兆好 《林业机械与木工设备》2007,35(8):4-8

分析了我国家具生产数控技术应用的现状及存在的问题,提出木工机械制造业应抓住机遇充分利用现有科技资源,开发适合我国家具生产的数控木工机床,尽快普及数控技术,实现家具生产的现代化.  相似文献   

云南省林业生产实行股份合作制的探讨   总被引：2，自引：0，他引：2  

施化云 《林业调查规划》2002,27(4):91-95

林业股份合作制是以林业合作制为基础 ,引入股份制的财产组织形式。实行政企分开 ,所有权和经营权相分离 ,民主决策 ,科学管理 ,利益共享 ,风险共担 ,是林业公有制的实现形式之一。详细论述了林业股份合作制的组织形式 ,运作方式 ,并探讨了我省建立林业股份合作制的途径。  相似文献   

Land tenure and farm management efficiency: The case of smallholder rubber production in customary land areas of Sumatra   总被引：3，自引：1，他引：3  

S. Suyanto  T. P. Tomich  K. Otsuka 《Agroforestry Systems》2001,50(2):145-160

This study assesses the impact of land tenure institutions on the efficiency of farm management based on a case study of rubber production in customary land areas of Sumatra, Indonesia. Using the modes of land acquisition as measures of land tenure institutions, we estimated tree planting, revenue, income, and short-run profit functions, and internal rates of return to tree planting on smallholder rubber fields. We find generally insignificant differences in the incidence of tree planting and management efficiency (defined as residual profits) of rubber production between newly emerging private ownership and customary ownership. This is consistent with our hypothesis that tree planting confers stronger individual rights, if land rights are initially weak (as in the case of family land under customary land tenure systems). On the other hand, short-term profits are higher on land that is rented through share tenancy. This result indicates that rubber trees are over-exploited under renting arrangements due partly to the short-run nature of the land tenancy contracts and partly to the difficulty landowners face in supervising tapping activities of tenants in spatially dispersed rubber fields. This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   

Biomass dynamics of Erythrina lanceolata as influenced by shoot-pruning intensity in Costa Rica     

Berninger Frank  Salas Eduardo 《Agroforestry Systems》2003,57(1):19-28

Pruning of agroforestry trees, while reducing shade of the crops, usually reduces both biomass production and nitrogen fixation. Short pruning cycles are often not sustainable on the long run, because tree production declines over subsequent pruning cycles. We compared biomass and labile carbohydrate dynamics of Erythrina lanceolata Standley (Papilionaceae) shade trees under total and partial pruning regimes in a vanilla (Vanilla planifolia L.) plantation in South-western Costa Rica. The highest biomass production was measured in the unpruned control, followed by trees with 50% of the leaf pruned every three months, while total pruning every six months resulted in the lowest biomass pruduction. In the more productive treatments, a higher proportion of the production was in branches. Because, the N content of woody branches was high, they were important for nitrogen cycling. In the partial pruning treatment more nitrogen was returned to the soil from litter and woody branches than from pruned leaf. Sugar concentrations were not different between treatments and the dynamics of non-structural carbohydrates (sugar and starch) seems to depend more on plant phenology than pruning treatment. However, the starch concentrations in the total pruning were lower than in the other treatments.This revised version was published online in November 2005 with corrections to the Cover Date.  相似文献