岷江上游干旱河谷地区不同覆盖处理对几种苗木生长的影响

为了提高岷江干旱河谷地区造林成活率和保存率,开展了乡土树种岷江柏、刺槐、榆树以及引进树种辐射松等4个树种造林试验研究,对黑地膜、白地膜、石块覆盖以及不加覆盖物（对照）4种处理方式的成活情况与生长情况等进行观察分析.结果表明：从处理方式上看,表现为覆盖处理均较对照好.其中以白地膜处理下表现最好,成活率达83.25%,保存率达79.18%;黑地膜表现次之,成活率与保存率分别为80.75%和76.75%;石块处理下,分别为75.50%和71.05%;而对照仅为65.5%和54.27%.从不同树种的生长表现上看,岷江柏表现最好,成活率与保存率分别达到92.00%和88.00%;榆树较好,二者分别达到91.67%和85.67%;刺槐次之,二者分别为81.67%和74.67%;辐射松最差,成活率仅为54.20%,保持率仅为54.03%.     

Effects of climate factors on the height increment of poplar protection forest in the riverbank field

Based on the data of stand investigation and stem analysis, the effects of climate factors on the poplar protection forest increment in the riverbank field of the Dalinghe and Xiaolinghe rivers of Liaoning Province, China were studied by stepwise regression procedure and grey system theories and methods. A regression model reflecting the correlation between the height increment of poplar protection forest and climatic factor was developed. The order of grey relevance for the effect of climatic factors on the height increment of poplar protection forest is: light>water>heat, and it could be interpreted that the poplar increment was mainly influenced by light factor, water factor, and heat factor. This result will provide scientific basis for the intensive cultivation and regenration of the poplar protection forest in riverbank field in similar regions in China. Foundation item: This study was supported by the National Natural Science Foundation of China (No. 30270250), and a key direction project (No. C12MC-SCMS013) Biography: LI Hai-mei (1975-), female, Ph. D, department of Landscpe Architecture. Art. Laiyang Agricultural College, Shandong Qingdao 266109, P. R. China. Responsible editor: Song Funan     

小兴安岭引种杂种落叶松家系苗期生长量分析

1年生苗期数据表明,小兴安岭南部地区可以引种杂种落叶松.日本落叶松×兴安落叶松高生长表现突出,其次是兴安落叶松×日本落叶松,日本落叶松×长白落叶松高生长较差,长白落叶松家系、优良种源生长都差,兴安落叶松优良种源长势最弱.生长较快的5个家系同当地生产对照相比快25.1%,与兴安落叶松优良种源比快52.9%,所有的杂种落叶松家系高生长都大于对照和兴安落叶松优良种源,杂种落叶松适应性较好,播种当年未发现有冻害现象.     

一个大数据库中预测蛋白质二级结构

本文在1个大数据库中采用广义的2次判别法来预测蛋白质二级结构.在包含2640个蛋白的数据库中,先是定义4肽结构字,然后利用3种4肽结构字建立多样性源同时结合二次判别法来预测21残基片段中心残基的二级结构,最后在误差允许范围内对预测结果进行修正,自治检验和独立检验的三态预测精度均超过83％.在同样的数据库中,与其它预测软件相比较,显示了我们的方法是占优势的.     

安远县杉木、马尾松人工林生长规律的研究

本文用杉木、马尾松林分平均解析木资料,拟合树高、胸径及材积生长模型,分析其生长规律。研究表明,人工杉木林、马尾松林的速生阶段、生长峰值年龄、数量成熟龄与立地质量相关密切。根据林分生长规律,将林分生长过程划分4个生长发育阶段。     

新疆伊犁白杨引种种质资源的生长量

对新疆伊犁引种的白杨派26个品种进行了生长量、形态特征、病虫害的比较分析。研究表明:白杨派26个品种生长量各不相同。方差分析表明,不同品种间树高和胸径均差异极显著(p<0.01);树高和胸径以及冠幅高和冠幅直径之间呈极显著正相关(p<0.01),胸径和冠幅高间呈显著正相关(p<0.05)。这说明在白杨派各品种间存在差异,优良品种的选择性很大。各个品种干形较好、树皮光滑;主要灾害是冻害,但都可愈合,没有虫害。26个品种中优势品种为84K、银×新12#、银×新4#、84-I-101、银白杨,可大面积推广。     

蜜环菌培养影响因子的多因素分析

[目的]探讨蜜环菌人工培养方法。[方法]研究菌材营养和pH、光照、温度等环境条件下蜜环菌生长形态变化规律和生长量。[结果]pH 5.0浸泡液浸泡菌材、黑暗条件有利于蜜环菌生长;温度较高有利于气生菌丝生长,温度较低有利于菌索生长;用带有栎树、棉秸秆的混合材料作菌材培养蜜环菌,可实现发菌快、菌索多的目的。[结论]试验结果为提高蜜环菌人工培养技术水平提供了理论依据。     

The impact of forest fertilization on growth of mature Norway spruce affected by Sirococcus shoot blight

The effects of forest fertilization and Sirococcus shoot blight on growth of mature Norway spruce (Picea abies (L.) Karst.) were studied in a field experiment. The single tree fertilization experiment was established with 144 sample trees in the year 2000. These trees were selected among the dominant and co-dominant trees of the stand in a way that half of the trees exhibited symptoms of Sirococcus shoot blight and the other half did not. One-third of the sample trees were fertilized with dolomitic lime, one-third with kieserite and gypsum and one-third were left unfertilized as control. The treatments were randomly assigned to the sample trees. As the experimental design became unbalanced due to tree mortality caused by bark beetle infestation final analyses were performed with the volume growth data of 125 sample trees only. An analysis of covariance was used to evaluate the effect of fertilization and Sirococcus shoot blight on volume growth. The average volume increment of the period 1977–1980 was used as a covariate attribute, assuming that during this period growth was not yet affected by Sirococcus shoot blight. Indeed an effect of Sirococcus shoot blight on growth turned out to start after 1980 and the analysis revealed that over the whole period 1981–2006 trees with shoot blight symptoms had a significantly lower increment. The increment reduction of the nonfertilized trees by Sirococcus   was 7.46±2.90$7.46\pm 2.90$% in 1981 and was continuously increasing with time to 37±3.78$37\pm 3.78$% by the year 2000. A significant positive effect of fertilization was only found for the kieserite+gypsum$\text{kieserite}+\text{gypsum}$ variant from 2002 to 2006, with the highest surplus increment in 2004 with 31.6±15.2$31.6\pm 15.2$%, calculated as average over the diseased and healthy group. However, a mitigation of the Sirococcus-caused increment loss via fertilization with kieserite and gypsum was statistically significant only for the year 2003. A moderate relationship between basal area increment and disease severity was found, indicating decreasing basal area increment with increasing disease severity.     

应用气候因素对中山柏的生长量进行灰色预测

本文根据灰色系统理论,选用与中山柏的生态适应性和生长潜力有关的气候因素资料,采用关联序分析法,以关联度来作为气候生态适应性的一种度量,并结合数理统计原理,根据气候生态适应性关联度值的线性回归模型对中山柏的生长量进行灰色预测.结果表明,预测精度较高,而且计算简便,实用性好,为林木生长量的预测提供了一种新方法.     

VAM真菌对茶树营养生长和茶叶品质的影响

本文用盆栽法研究两种ＶＡＭ真菌对茶树营养生长和茶叶品质的影响。结果表明，由于菌根真菌侵染，使土壤磷酸酸酶和寄主根系脱氢酶活性明显增强，促进了茶树对Ｐ、Ｃｕ、Ｍｎ的吸收，同时茶树生长量和生长率显著提高，叶绿素和咖啡碱含量增加，而过氧化物酶活性降低，Ｆｅ和儿茶素含量减少。