秸秆焚烧现状与对策探讨

就我国当前秸秆焚烧问题展开探讨研究,通过深入分析当前秸秆焚烧现状,探讨问题产生的客观原因,并有针对性地提出可行性对策,为我国秸秆资源化进程提供参考。     

生物质型煤与无烟散煤在烟叶烘烤中的应用效果对比

2010年在云南曲靖进行了生物质型煤与无烟散煤的对比研究,通过试验分析了不同类型燃料的燃烧效率、添加次数与耗煤量,以及对烤后烟叶质量、烘烤经济效益的影响.研究结果表明:生物质型煤升温均衡,主要表现在烘烤定色阶段和干筋阶段;生物质型煤稳温效果好,主要表现在变黄期关键温度点38℃和定色期47℃,但总体耗煤量大、加煤频繁;燃...     

日本对虾越冬亲虾性腺促熟及工厂化育苗技术研究

1997、1998年利用越冬亲虾进行性腺促熟,用镊烫法切除眼柄,促进亲虾发育。结果:两年共培育亲虾雌虾8204尾。雄虾5683尾,获交尾虾5360尾。交尾率为71.81％。每年两批育苗,共利用水体1720m~3,育出0.7～1.1cm的虾苗12450万尾,平均单位水体出苗量为7.24万尾/m~3,效益显著。     

曲靖市森林火烧防火线技术研究

介绍曲靖市森林防火现状及火烧防火线技术应用概况.阐述森林火烧防火线作业的最佳时期选择、工作程序、人员组织、任务分配、设备配置以及作业程序等.     

特种黑木炭研制报告

特种黑木炭是用柞、槲烧制的具有较高密度的木炭。影响黑木炭密度的主要因素有原料含水率和径级、干燥与炭化速度、炭窑窑形及精炼。本文还对烧制特种黑木炭过程中的具体操作技术要点进行了详尽的论述。     

Analysis of Original Causes of Reed Fires in Zhalong Nature Wetland Reserve in Heilongjiang Province

Zhalong Nature Reserve is located in the border areaof Qiqihaer City, Fuyu County, Lindian County andTailai County of Heilongjiang Province. The area ofthe reserve is 210 000 ha. The reserve is the firstnature reserve for protecting wetland and crane inChina. There were more than 300 red-crownedcranes here at the very most. Zhalong Nature Reserveis situated at the Songnen Plain, the lower stream ofthe Wuyuer River. It is the biggest nature reserve inChina that takes crane and wetland …     

常绿阔叶林迹地炼山营造杉木林群落演替趋向调查初报

据样地调查，该２５年生杉木人工林群落的植物有４１科８４属１２０种，群落的外貌特征以包括藤本在内的高位芽占绝对优势，叶特征以革质，单叶，中小型叶为主，由于该群落的幼树层以米储和木荷等占优势，若让其自然发展或杉木林采伐后不炼山，并排除其它人为干扰，该群落将向与常绿阔叶林采伐前的群落类型相似的方向演替。     

Pyrolytic characteristics of burning residue of fire-retardant wood

In order to investigate the pyrolytic characteristics of the burning residue of fire-retardant wood, a multifunctional fire-resistance test oven aimed at simulating the course of a fire was used to burn fire-retardant wood and untreated wood. Samples at different distances from the combustion surface were obtained and a thermogravimetric analysis (TG) was applied to test the prrolytic process of the burning residue in an atmosphere of nitrogen. The results showed that: 1) there was little difference between fire-retardant wood and its residue in the initial temperature of thermal degradation. The initial temperature of thermal degradation of the combustion layer in untreated wood was higher than that in the no burning wood sample; 2) the temperature of the flame retardant in fire-retardant wood was 200°C in the differential thermogravimetry (DTG). The peak belonging to the flame retardant tended to dissipate during the time of burning; 3) for the burning residue of fire-retardant wood, the peak belonging to hemicellulose near 230°C in the DTG disappeared and there was a gentle shoulder from 210 to 240°C; 4) the temperature of the main peaks of the fire-retardant wood and its burning residue in DTG was 100°C lower than that of the untreated wood and its burning residue. The rate of weight loss also decreased sharply; 5) the residual weight of fire-retardant wood at 600°C clearly increased compared with that of untreated wood. Residual weight of the burning residue increased markedly as the heating temperature increased when burning; 6) there was a considerable difference with respect to the thermal degradation temperature of the no burning sample and the burning residue between fire-retardant wood and untreated wood. __________ Translated from Journal of Beijing Forestry University, 2006, 28(3): 133–138 [译自: 北京林业大学学报]     

Differential responses of Bolivian timber species to prescribed fire and other gap treatments

We followed the establishment and growth response of 13 commercial tree species to canopy opening, above-ground biomass removal, and experimental burns of low and high intensities in a lowland dry forest in Bolivia. Three patterns of response to treatments were observed among the most abundant commercial tree species. (1) Shade-intolerant species regenerated mostly from seed and had the highest survival and growth rates following high-intensity burns. (2) Shade-tolerant species were abundant in gap control and plant removal treatments. Treatments had little effect on the height growth of these species. (3) Individuals of root sprouting species were most abundant following plant removal and low-intensity burn treatments. Treatments had little effect on the height growth of these species. The wide variation in species responses to gap treatments found in this study not only reinforces the concept that species are distributed along a continuum of shade-tolerance levels, but that other aspects of species biology, such as seed dispersal type or sprouting behavior, further differentiate regeneration strategies. The variety of regeneration strategies found among the species at this forest site will require a flexible management scheme that mixes more intensive silvicultural treatments such as prescribed burning with less intensive treatments.     

杉木人工林地力维持及更新技术研究

通过对土壤和杉木幼林调查分析结果表明 ,炼山、全垦初期表层土壤水分物理状况得到一定的改善 ,速效性养分大量增加 ;1年后 ,土壤表层水分物理性能变差 ,速效养分流失 ,土壤肥力逐渐下降。不同营林措施组合处理的杉木幼林生长 ,在树高、胸径、单株材积平均生长量上有差异 ,经方差分析 ,胸径、单株材积生长量有显著性差异 ,而树高生长量差异不显著