日本落叶松、杂种落叶松嫩枝全光喷雾扦插的研究

利用日本落叶松优树子代2.5年生的幼树、50.5年生优树及9.5年生杂种落叶松优良个体做为采条母树,以河沙、锯末、蛭石为基质,借用长臂旋转扫描喷雾装置,在全光喷雾条件下,扦插半木质化的嫩枝获得成功。2.5年生幼树条扦插生根率达95％以上(6月20日扦插),17个9.5年生杂种落叶松优株条扦插(7月20日),平均生根率,河沙基质为74.31％,锯末基质为68.60％,蛭石基质为51.90％,生根率最高的系达到96.20％,生根率超过70％以上的系占41.18％。扦插基质对生根的影响作用,以河沙为最好。50.5年生的成龄母树条扦插,幼化的干萌条和嫁接后的幼树条扦插,都比没有经过幼化处理的插穗提高生根率。生根素IBA、ABT处理2.5年生幼树条,7月20日扦插,对生根速度有作用,生根素浓度,50ppm比100ppm好,处理50.5年生成龄母树条100ppm比50ppm好。     

Sorption of Cr(VI) on the wood of Japanese larch treated with concentrated sulfuric acid

A carbonaceous sorbent was prepared from the wood of Japanese larch (Larix leptolepis) by dehydration with concentrated sulfuric acid in a 69% yield. The abilities of the sorbent to remove Cr(VI) from aqueous solutions were investigated. Research parameters included the initial solution pH, temperature, and initial concentration of Cr(VI) in solution. The removal of Cr(VI) was highly solution pH dependent and was mainly governed by physicochemical sorption under weak acidic conditions. The equilibrium data fit well in the Langmuir isotherm model. The Langmuir constants were calculated at different temperatures, and the sorption capacity increased with rising temperature, indicating the endothermic nature of the Cr(VI) sorption onto the sorbent. The desorption experiments suggest that the Cr(VI) sorption is generally irreversible, owing to strong interaction of HCrO ₄ ⁻ with the active sites of the sorbent.     

Quantitative dynamics on stimulating regeneration and sowing seedlings of Larix gmelinii in Daxing''''an Mountains

Introduction4LarixgmeliniiisoneofmajortimberspeciesinthenortheastDaxing'anMountainsinChina.Itplaysanimportantroleinprovidinglumber,maintainingthenaturalenvironmentinthisregionandadjustingecologicalequilibrium.Alargenumberofburnedareasandcut-overareasneedtoregenerateeveryyear.Larixgmeliniihasgreatnaturalregenerationcapabilityandenoughseedsources,andalmostmeetsabumperharvestyeareverythreeyears(Xuetal.1992;Shan1990;Xuetal.1993).Someburnedandloggedareaswouldberapidlyrestoredthroughafewofassista…     

汉语“着”的日译浅析

汉语中的“着”字，是一个常见的多音、多词性、多义的词，出现频率高，使用范围广，因此，把汉语“着”字译成日语时，也就出现了多种不同的译法。本文按照“着”字的汉语读音、词性、词义的顺序，通过实例就它的日译问题进行一番分析。     

落叶松播种苗使用钼酸铵根外追肥试验报告

通过对落叶松播种苗根外追施钼酸铵液，促进苗高，地径生长，较明显地提高了苗木整体质量，对苗木木质化和提高苗木对不良环境的抵抗力有着积极的促进作用。     

落叶松KP浆碱抽提段强化漂白研究

重点研究了落叶松KP浆CEH三段漂白碱抽提段用H2O2强化的工艺，并对添加螯合剂EDTA的效果进行了研究。     

Research Progress on Rapid Serological Assays for Diagnosis of Japanese Encephalitis B

Japanese encephalitis B (JE) is a zoonosis caused by Japanese encephalitis virus which invades the central nervous system,infected by mosquito.Various animals could be the sower and reservoir of JE including swine,horse,cattle and avian.JE could cause a major public health trouble and a horrible crisis of the farm all in Asia and the Western Pacific region.Therefore,it is necessary to diagnose it rapidly and accurately.This review article made a sketch of approaches for the rapid serological assays of JE,including traditional method,emerging technologies and specific improvements of the assay,so as to provide references for the study of rapid,simple and accurate JE diagnose methods.     

落叶松刨切薄木及其深加工工艺研究

对长白落叶松刨切用材的加工工艺进行了初步研究，结果表明：长白落叶松是一种比较理想的刨切用材，蒸煮工艺虽能较好地浸渍出树脂和软化活节，但对落叶松的死节处理尚属难题．采用此薄木贴面的刨花板，经检测各项性能指标均达到ＧＢ／Ｔ１５１０４—９４要求，用其制造的家具各项性能均达到ＧＢ４８９３—８５、ＧＢ３３２４—８２、ＧＢ１０３５７—８９要求．     

杂种二代落叶松增产能力的研究

利用杂种一代自由授粉的种子造林，所产生的杂种二代具有明显的增产能力。７年生的落叶松高生长比对照平均增加３９．６％，其保存率也普遍高于对照。杂种二代与杂种一代一样具有较强的抗寒能力和适应性。充分利用杂种一代，可节省大量的人力、物力，促进营林生产的发展。     

系统动力学方法在林分断面积生长模型中的应用

由于辽宁东部地区日本落叶松长期处于自然生长状态下,缺乏科学的经营管理,因而年平均生长量较低,亟待进行人为经营,加快其生长,增加后备资源。将系统动力学方法应用于日本落叶松断面积生长研究中,旨在对日本落叶松的生长进行准确的预测,从而为森林经理者合理经营提供理论指导。分别用传统方法和系统动力学的方法对断面积生长进行建模,并进行比较择优,同时用同一地区的30块样地模型进行了精度检验。结果表明,用系统动力学方法来模拟断面积生长规律简便易行,突破了以往传统模型的局限性,同时克服了传统模型繁琐复杂和参数较多的缺点,拟合效果理想。