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1.
胡云楚 《中南林业科技大学学报(自然科学版)》1997,(4)
用质量分数为10％的六甲基磷酰三胺溶液（80℃）处理杉木15min，TG－DTG研究表明，样品的热解峰温由410℃降到290℃，残余炭量由17．2％增加到48．2％．垂直以燃烧试验表明，处理后的杉木试样，火焰延续时间不超过20S．将试样用蒸馏水浸泡2d后，其阻燃效果无显著损失． 相似文献
2.
杉木无性系采穗母株药剂处理促萌试验 总被引：4，自引：0，他引：4
为快速扩繁增殖杉木优良无性系，应用生长素、赤霉素、细胞分裂素和ＫＭｎＯ４等化学药剂处理杉木采穗母株根颈试验，探讨促萌机理。结果表明，０．２％ＫＭｎＯ４液，１０×１０－６２．４－Ｄ和５×１０－６三十烷醇三个处理有促萌效果，萌条数量分别比对照增加４６．２％，２５．８％和１４．０％。 相似文献
3.
结合贵州第一期世行贷款造林，在黎平县中潮长岭营建世行贷款国家造林项目杉木试验示范林８８ｈｍ＾２，推广面积８０００ｈｍ＾２，试验内容包括：杉木幼林施肥效果，杉木林地土壤肥力监测：杉木不同施肥时间效果，示范内容包括：杉木优良家系，杉木优良种源和杉木优良无性系示范林，试验示范结果表明，Ｉ．施肥效果以ＮＰＯ２Ｋ１处理的生长量最大，施肥后４年，树高生长量比无肥对照大４２．４％，胸径大３４．２％，ＮＰ１和Ｐ２ 相似文献
4.
为了解造林后杉木林地土壤肥力的变化情况及施肥对林地土壤肥力的影响，经对杉木中心产区土壤肥力中等的杉木林地设固定样地，进行了土壤肥力的监测研究。结果表明，杉木林地施肥后土壤的理化性质得到了改善。施肥后第２年，土壤的含Ｐ量，Ｐ２和Ｐ２Ｋ１处理分别比对照提高了１３％和２１％，而Ｐ２Ｋ１处理的速效和缓效Ｋ比对照提高２０％和１９．５％；施肥后第４年其含Ｐ量分别大２５％和２８％；而Ｐ２Ｋ１处理的速效和缓效Ｋ比 相似文献
5.
从生产力资源利用和养分循环综合评价杉松混交组合 总被引：1，自引：0，他引：1
杉木和松树混交试验，都是按６６％杉木加３４％松树（湿地松、加勒比松、热带松、火炬松、晚松）混交组合的，只有对照区是杉木纯林。试验林的密度为２５００株／ｈｍ￣２，其中杉木１６５０株１０．６６ｈｍ，松树８５０株／０，３４ｈｍ￣２。均是一年生实生苗于１９８３年春季造林，小区面积全是０．２ｈｍ￣２。１０年生时进行了生产力调查，并计算了生物能积累，辐射能利用，养分利用效率和归还串等。试验结果表明：杉木火炬松混交林生产力最高达到６．５５ｔ／ｈｎｔａ，养分利用效率好，每吨养分可生产生物量７３ｋｇ／ｈｎａ‘·ａ：杉木加勒比松混交林辐射能利用率最大达到３．９７％，生物能积累总计为１７３３６ｋＪＪｍ２·ａ，养分归还率最好达到４．８６％。从生产力、辐射能利用率、养分利用效率和养分归还率等综合比较，得分由大到小的顺序是：杉木晚松混交林）杉木加勒比松混交林杉木湿地松混交林杉木火炬松混交林杉木热带松混交林）杉木林。总之，经营杉松混交林经济效益优于杉木纯林。 相似文献
6.
对２０个杉木不同家系的苗木进行磷素营养要求试验，１年生苗木盆栽试验结果表明：杉木不同家系苗木对磷素营养反应敏感，２ｇ磷处理使苗高、地径分别增益３．７％—９６．５％、７．４％—６１．１％，４ｇ磷处理使苗高、地径分别增益２．１％—８３．１％、３．７％—５７．９％，杉木苗期需要磷素营养。三明３８、三明６７、三明４８、三明５８四个家系生长比较理想，在０ｇ磷处理下，１年生平均苗高１３．０—１５．９９ｃｍ，平均地径０．２３—０．２７ｃｍ，这４个家系具有更大的生长潜力，２０个家系间对磷素营养要求方面不存在显著的差异。 相似文献
7.
１９９１￣１９９５年试验结果表明，在江西分宜花岗岩残积物发育的黄红壤上，杉木幼林施Ｎ、Ｐ、Ｋ及配合处理，使树高、胸径、蓄积总生长量指标分别达到５．６７￣６．５９ｍ、８．３５￣９．２８ｃｍ、６７．９２２￣９６．４１ｍ＾３／ｈｍ＾２，较对照增长５．６％￣２０．２％、７．４％￣１７．５％、２１．６％￣５６．２％。在各种施肥处理中，以５０ｋｇ／ｈｍ＾２Ｐ２Ｏ５的效果最佳，其连年生长量效应显著持续到第５年； 相似文献
8.
氮对杉木不同家系苗木生长影响试验研究 总被引：5，自引：1，他引：4
采用１９个杉木不同家系的苗木进行氮素营养要求试验，１年生苗木盆栽试验结果表明：杉木不同家系对氮素营养的要求差异较大；有些家系生长好，对氮素要求也高，２ｇ氮处理可使家系三明５４苗高、地径生长增益分别达３９．８％、４１．７％，三明５６苗高、地径生长增益分别达４５．５％、３９．７％；有些家系生长不良，对氮素营养的要求高，２ｇ氮处理可使家系三明４２苗高、地径生长增益分别达３１６．２％、１０３．６％，Ａ１苗高、地径生长增益分别达１３２．５％、１３８．０％；有些家系生长不良，对氮素营养的要求不高。 相似文献
9.
杉木幼林施肥时间效应研究 总被引：1，自引：0，他引：1
４年试验结果表明，花岗岩发育的黄红壤上杉木幼林单施钙镁磷肥、尿素、氯化钾对生长促进作用与施肥时间有关，氮肥或钾肥被分次追入的生长效应高于一次性追肥；磷肥作基肥当年造林时一次性施入效果优于１年以后１次性追肥或分次追肥效果，到第４年底时，造林时施１００ｋｇＰ２Ｏ５／ｈｍ２，其蓄积量显著大于钾肥与氮肥处理，所有处理中，钙镁磷肥一次性施入１００ｋｇＰ２Ｏ５／ｈｍ２的处理生长量最大，其胸径和蓄积与无肥对照相比第３年分别提高２０．０％和６４．４％，第４年分别提高１６．２％和４２．１％ 相似文献
10.
１５年来，浙江省临安县共推广杉木良种造林１．８４万ｈｍ２，占同期杉木造林的５２．９％，１５年生种子园混系子代遗传增益１８．１１％，累计增加产值２７５６．７万元，预计到轮伐期满的第２０年可增产值９８１０．６万元． 相似文献
11.
酚类阻燃剂处理杉木热解过程的热动力学研究 总被引：8，自引：0，他引：8
抗流失阻燃剂是当前阻燃剂研究开发的一个重要方向。采用TG DTA热分析技术研究了酚类阻燃剂处理杉木热解过程各阶段的木炭产量和热动力学参数。结果表明 ,酚类阻燃剂阻燃处理杉木的产炭量因苯环上取代基不同而不同 ,其阻燃作用的大小顺序为 :氨基 >溴 >硝基。同时具有氮元素和溴元素的二溴硝基苯酚和二溴氨基苯酚的产炭量都大于相应的单取代苯酚衍生物。浸泡实验后 ,磷酸氢二铵的产炭损失率是二溴硝基苯酚的 5倍。阻燃处理后产炭量的增大总是对应于炭化阶段热解反应峰温降低、反应速率常数增大 ,但产炭量的增大程度与这些热动力学参数的改变是负相关的。因此 ,氮和溴的苯酚衍生物不仅对木材具有很强的阻燃作用 ,而且具有很强的抗浸泡能力 ,氮元素的阻燃作用与其在阻燃剂中的氧化态关系极大 ,氮和溴在木材阻燃中存在协同增效作用 ,阻燃处理对木材的吸湿性也有影响。 相似文献
12.
13.
Xiaoqian Wang Fang Wang Zhiming Yu Yang Zhang Chusheng Qi Lanxing Du 《Journal of Wood Science》2017,63(3):271-280
The use of multifunctional wood for decorative purpose has grown increasingly popular in recent years. In this study, fast-growing poplar wood was treated with dye (0.5%) and flame retardant (0, 10, 20, and 30%) simultaneously to enhance its visual characteristic and safety. The dynamic wettability and surface free energy of wood samples were studied using S-D wetting model and van Oss–Chaudhury–Good (vOCG) method, respectively. Dye uptake, drug load, color difference, and combustion performance were determined. The treated wood was also characterized by infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The results indicated that the proposed treatment yields favorable adhesive spreading and penetration ability at the wood surface. The surface free energy of treated wood was higher than that of untreated wood, and the dye uptake, drug load, color difference, and limited oxygen index all increased after the proposed combination treatment compared to dye-only treated wood. The results also indicated that the flame retardant reacted chemically with the wood as the dye and flame retardant molecules diffused into the cell cavity, wood vessel, and aperture. 相似文献
14.
Wood polymer nanocomposites (WPNCs) based on simul wood (Bombex ceiba, L.) were prepared by impregnation of styrene acrylonitrile copolymer, γ-methacryloyloxy trimethyl silane-modified TiO2, SiO2 nanoparticles and nanoclay intercalating mixture through vacuum impregnation. The impact of nanofillers on the physical properties, flame retardancy, water resistance, anti-swelling efficiency and biodegradability of the resultant WPNCs was investigated. Remarkable enhancement in wood properties such as flame retardancy, water resistance and anti-swelling efficiency was achieved with the treatment. The results showed that all the properties were maximum for wood samples treated with SAN/TiO2 (0.5 %)/SiO2 (0.5 %)/nanoclay (0.5 %). The presence of TiO2 nanoparticles in WPNC exhibited antibacterial activity. The resistance to biodegradation was observed by incorporation of nanofillers into wood. 相似文献
15.
Guangjie Zhao Wensheng Luo T. Furuno Qiang Ren Erni Ma 《Frontiers of Forestry in China》2007,2(2):231-236
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.
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Translated from Journal of Beijing Forestry University, 2006, 28(3): 133–138 [译自: 北京林业大学学报] 相似文献
16.
In order to improve wood properties of triploid clones of Populus tomentosa, urea-formaldehyde (UF) resin was compounded with nano-SiO2, coupling agents and flame retardants in different ways to prepare five kinds of modifiers. The poplar wood samples were
impregnated with the modifiers and heated to prepare UF-SiO2-wood composites. The antiswelling efficiency, resistance of water absorption, oxygen index and hardness of the composites
were measured. Results show that all of the modifiers reduced water absorption of poplar wood and enhanced flame resistance
and hardness. Nano-SiO2 showed a marked effect in improving the hardness of wood. In addition, all of the modifiers, except UF-C-SiO2-polymer, improved the dimensional stability of poplar wood. The UF resin and nano-SiO2 compound improved general properties of poplar wood.
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Translated from Journal of Beijing Forestry University, 2006, 28(2): 123–128 [译自: 北京林业大学学报] 相似文献
17.
采用锥形量热仪(CONE)研究可膨胀石墨(EG)与聚磷酸铵(APP)对木粉/聚丙烯复合材料的协同阻燃作用。CONE测试结果表明:EG和APP均可降低木粉/聚丙烯复合体系的热释放速率(HRR)、总热释放(THR)和烟释放速率(RSR),提高成炭率;与APP相比,EG表现出更好的抑烟效果。当EG与APP的总添加量为15%、复配比例为2∶1时,能形成稳定致密的膨胀炭层,阻燃协同效应显著。力学性能测试结果表明:即使在马来酸酐接枝聚丙烯相容剂(MAPP)的存在下,EG和APP阻燃剂的添加对复合材料的冲击强度和弯曲强度仍有不利影响,但EG的添加可提高复合材料的弯曲模量。 相似文献
18.
通过处理三组不同密度的水曲柳,对比研究了BL-环保阻燃剂和市场上两种木材阻燃剂的渗透性及阻燃性等。结果表明,BL-环保阻燃剂在阻燃性、抑烟性方面优于另外两种阻燃剂;在渗透性和吸湿性方面居中;而在对木材力学性能的影响方面不如其他两种阻燃剂。 相似文献
19.
INTRoDUCTIoNThechemicalscommonlyusedforflameretardantstowoodincludeammoniumphosphate,phosphoricacid,boricacid,borax,hydratedalumna,am-moniasulfate,zincchlorideandmagne--siumcNoridetl'2j.Thesechemicalsareimpregnatedasaqueoussolutionsintothewoodwheretheyaredepositedwithintheporesandcapillariesofthewoodwhenthesolutionevaporates.Butthesechemicalsarenotsuitableforexteriorandunder-groundconstructionwheretheflameretardantsareleachedeasily[3:.Nowanimportantdevelopmentorientationofstudyingonflamere… 相似文献