早熟禾锈病的研究

人工接种实验结果证明，哈尔滨市早熟禾锈病是由冠锈菌引起的，其转主寄主为：小叶鼠李、金刚鼠李和东北鼠李。该病菌主要以冬孢子越冬，也有少量夏孢子可以越冬。用夏孢子人工接种潜育期为９￣１４ｄ，用锈孢子人工接种在２０℃时潜育期为８￣１２ｄ。早熟禾锈病的发病高峰期一般在８月上旬￣９月上旬，病情的轻重与降雨量关系较大。防治试验结果表明：用火烧去草坪上的干枯叶能推迟和降低发病率１０％；定期合理修剪草坪，茬高８ｃ     

油松优树子代测定及遗传增益的初步研究

通过对５３０株油松优树子代林内８２９个家系（次）生长疸的测定，初步选出了较为优良的油松家系，并对不同来源的优树家系和单株的树高及地径的遗传率进行了估算。     

The Preliminary Study on Juvenile-Mature Correlation of Pinus Koraiensis

IntroductionWoodisveryimportantfinaIproductinforestman-agement,andimprovingwoodproductandquaIityarecommongoaIinmostbreedingsystems.EarlyselectionfortreegrowthnotonIyprovideexceIIentnurserystorematerialforplantinghighyieIdforest,butaIsopossibIyimproveselec…     

The preliminary study on juvenile-mature correlation ofPinus koraiensis

Through studying seven analytic trees from two stands ofPinus koraiensis artificial forests, the results show that the individual variation coefficient of tree heigh, dbh and volume decreases with age increasing after age of 25. Age of 25 is the age that difference of individual growth is from acute difference to comparatively stability. The optimum selection age is 25a forPinus koraiensis’s artificial forests according to the analysis of juvenile-mature correlation, and early selection efficiency. (Responsible Editor: Zhu Hong)     

The carbon budget of an adult <Emphasis Type="Italic">Pinus cembra</Emphasis> tree at the alpine timberline in the Central Austrian Alps

We investigated carbon (C) uptake and respiratory losses of an adult Pinus cembra tree at the alpine timberline throughout an entire year by means of an automated, multiplexing gas exchange system. These chamber measurements were then combined with biomass data for scaling up the C budget to the tree level. Integrated over an entire year, the cumulative C gain of the tree under study was 23.5 kg of C in 2002. The daily C balance was negative for 5 months and the estimated total wintertime respiratory losses were 9% of the amount of C fixed during the growing season. The total annual C loss of the tree consumed 55% of the annual net C gain and the remaining surplus was stored in new tissues (36%) and used for fine root growth (9%). Thus, the overall C budget of P. cembra at the upper timberline is balanced fairly well, although the C sink strength in fine roots is strongly limited owing to low root zone temperatures when compared to conifers at lower elevation sites.     

滇西北高山针叶林区主要林型下外生菌根真菌的分布

1985年和1986年,我们在云南西北部高山针叶林内,采用标准地调查和路线踏查相结合的方法,在杜鹃-冷杉林等7个主要林型中进行了外生菌根真菌调查。经对采集标本的鉴定,计有33个属约140余种外生菌根真菌。它们在各种林型下的分布有着一定的规律。其种类组成和分布的多度与林木的组成、土壤和地形条件,如海拔高度、坡向、坡度等有密切的关系。     

太行山石灰岩山地油松人工林育林目标的确定

根据太行山中南地段油松人工林生长预测、投入产出分析、生态功能分析,提出了该区域油松人工林适宜培育以防护林为主的多育林目标,即以培育油松人工用材林、油松人工水源涵养林、油松人工水土保持林为育林目标,以发挥油松人工林三大效益为目的。     

广东省马尾松经济成熟龄的初探

为探讨在市场经济条件下，使森林利用达到最大经济效益，搜集了广东省东部、西部、北部马尾松用材林的有关资料和数据，采用土地纯收益法、内部收益率模型、净现值一般模型3种方法，计算马尾松用材林的经济成熟年龄为17～20年，     

沙地樟子松树坨移栽技术研究

为提高沙地大树移栽成活率 ,尽快成林 ,本文论述了沙地移栽大树坨成败因素、方法 ,提出樟子松树坨以 6～ 8年生为最佳 ,超过 10a不宜移栽。同时提出沙地树坨移栽的 2种新方法     

Research on the heredity and variation of the peruxidase isoenzyme of needles ofpinus koraiensis

Through the polyacrylamide gel electrophoresis analysis of thirty-two needle samples of ninty-years oldpinus koraiensis in Harbin, seven typies of zone and distribution of the zone frequency, and some objective fact of heredity and variation were determined. These informations can be used as reference materials in the research of heredity and variation ofpinus koraiensis.