树莓和黑莓品种的引种试验

以从美国引进的9个树莓和黑莓品种为研究材料,从物候期、经济性状和基生枝等方面分析了不同品种之间的差异,初步筛选出了红树莓32号、7号、27号和黑莓58号等几个优良品种,为树莓和黑莓品种在石家庄地区的推广提供理论依据。     

皖黑树莓1号等4个优良品种选育研究

2003年从中国林业科学研究院引种了10个树莓品种,经4年苗期试验和9年造林试验观察,从生物学性状、产量、抗逆性等调查和室内经济性状分析,选育出皖黑树莓1号、2号、3号、4号。它们在熟性、抗逆性、品质、产量上均优,适宜在合肥及江淮分水岭地区发展。     

5个树莓品种引种初报

通过4年的引种栽培观察,结果表明:夏红树莓9号、39号、38号3品种生长结果表现良好,产量高,4年生株丛产量达3.0~3.4 kg。夏红树莓6月下旬至7月上旬成熟,黑莓8月中旬成熟。夏红树莓10号、黑莓58号有待进一步观察。     

树莓在石家庄地区的引种试验

该文对引种的树莓品种的物候期、结果母枝数量、果实成熟情况、树势状况等生长习性进行了观察研究。经比较发现树莓 4、7、10、32号果个较大 ,酸甜可口 ,适合鲜食。 35号丰产性强但味道偏酸。 2 7号果个较大 ,丰产性强但籽硬 ,适合加工。 5 8号丰产 ,口感较好 ,果个中等。     

7个树莓品种哈尔滨地区生长节律研究

对7个树莓品种进行研究的结果表明：树莓5月中旬萌动,6月中旬至7月中旬不同品种树莓相继转入生殖生长期。7、8月份为一次果实成熟期;8、9月份是双季品种的二次果实成熟期。单品种树莓成果采摘期约为20天．生长期120天左右。不同品种树莓果实成熟期可从7月中旬持续到9月下旬。基生枝年平均生长量为136．5cm,生长旺盛期为7—8月份,且单季树莓高于双季品种。     

澳洲红等四个树莓品种引种试验结果初报

黑龙江带岭林业科学研究所从2000年开始经过三年多的不同品种引种栽培试验,美国22号、澳洲红、费尔杜德、黄树莓这4个树莓品种,通过防寒土能安全过冬,且生长表现良好,在伊春地区的高寒气候均有较强的适应性,较适合退耕还林推广栽培。4个品种味道俱佳,均可作为鲜食品种,经济价值较高,有良好的经济前景。     

栽培密度对不同品种树莓产量的影响

文章是以带岭所引进的多个树莓品种为研究对象,探讨栽培密度对不同品种树莓产量的影响,为小兴安岭地区树莓品种的选择与栽培密度提供理论依据。     

树莓育种研究进展

本文就树莓的种质资源 ,遗传结构 ,现代生物技术在树莓育种中的应用以及国内外树莓育种进展进行了述评 ;对国内外主栽品种及新育成的品种特性作了介绍 ,并对今后我国树莓的育种问题进行了探讨     

基于灰色系统的林木胸径生长模型研究

利用灰色系统GM(1,1)模型对某地广玉兰胸径生长数据建模,并与多项式模型、S曲线模型结果进行对比分析。结果表明,在观测数据较少的情况下,灰色系统模型比多项式拟合和S曲线模型更实用、更准确,灰色系统建立林木胸径生长模型是可行的。     

树莓育种研究进展

本文就树莓的种质资源，遗传结构，现代生物技术在树莓育种中的应用以及国内外树莓育种进展进行了述评；对国内外主栽品种及新育成的品种特性作了介绍，并对今后我国树莓的育种问题进行了探讨。     

树莓总多酚及其抗氧化功能研究

树莓中含有降低慢性疾病发生的抗氧化活性物质,研究用溶剂法提取悬钩子中生物活性物质,并测定总多酚及提取物的抗氧化活性。丙酮作为溶剂提取的树莓中总多酚,用福林酚法测定其含量为708．54mg／100g鲜果。通过测定树莓提取物清除DPPH自由基、ABTS自由基、羟自由基、超氧阴离子自由基的能力,评价其抗氧化活性。结果表明提取物具有较强的体外抗氧化能力,这可能与树莓中的多酚含量有关。因此,悬钩子具有良好的抗氧化活性,可作为一种潜在的用于抗癌活性物质的来源。     

皇甫山野果资源调查及开发利用

皇甫山自然保护区野果资源共计14科，60余种。其中，以山莓、蓬Lei、桑、山桃、橡子等品质较好，资源量较多，具有较大开发价值。在开发的同时，更注重保护野果资源，并利用科技手段，扩大野果资源量，提高野果品质，实现对野果资源的永续利用。     

树莓的栽培利用及发展前景

结合有关文献对树莓的栽培历史、植物学分类、生物学特性、营养价值、栽培技术及开发利用前景进行了综述。     

尤溪县野生天然食用色素植物资源及开发利用

通过对尤溪县野生天然食用色素植物资源的调查,结果表明,该区共有野生天然食用色素植物21科24属37种。其中木本植物25种,草本植物12种。优势科有蔷薇科、杜鹃花科、葡萄科,优势属有悬钩子属、越桔属、葡萄属。可利用的部位有根、根茎、茎、叶、树皮、花、花瓣、果实、果皮、果汁及全草,以果实可利用的种类最多。染液的颜色有红色、紫红、橙红、黄色、橙黄、绿色、黑色、褐色、茶褐色、紫色、蓝色等多种,以红色素最多,其次为黄色素。黄栀子、龙葵、荩草、虎杖、姜黄、金樱子、商陆以及悬钩子属、葡萄属、越桔属、荚蒾属的种类在该区分布广、贮量大、利用价值高,值得进一步研发利用。     

Radical scavenging activity and composition of raspberry (Rubus idaeus) leaves from different locations in Lithuania

Raspberry (Rubus idaeus) leaves, collected in different locations of Lithuania were extracted with ethanol and the extracts were tested for their antioxidant activity (AA) by using ABTS(.)(+) decolourisation and DPPH(.) scavenging methods. All extracts were active, with radical scavenging capacity at the used concentrations from 20.5 to 82.5% in DPPH(.) reaction system and from 8.0 to 42.7% in ABTS(.)(+) reaction. The total amount of phenolic compounds in the leaves varied from 4.8 to 12.0 mg of gallic acid equivalents (GAE) in 1 g of plant extract. Quercetin glucuronide, quercetin-3-O-glucoside and rutin were identified in the extracts.     

Median-based regression methods in wood science applications

Summary Regression analyses using the traditional, mean-based, least squares (LS) and the median-based, least absolute deviations method (LAD) were performed on twenty-five sets of bending strength and stiffness data. Comparisons of regression models were made to determine the effect of mathematical technique. In all cases, model coefficients demonstrated some degree of sensitivity to regression method. In cases where the residual data appeared to approximate a normal distribution, the models produced fairly similar results. However, the LS technique was found to be highly influenced by even a single extreme residual value. LAD regression proved to be far more stable in the presence of extreme residual values due to its more rational distance function.This material is based upon work supported by the Cooperative State Research Service, U.S. Department of Agriculture, under Agreement No. 90-37291-5748     

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     

Leaf biomass determination on woody shrub species in semiarid zones

Leaf biomass over 20 native species from thornscrub canopies was evaluated by five non-destructive allometric methods and compared in order to determine the most accurate estimating procedure. Indirect relationships between leaf biomass and some ecological characteristics of the plants may be found by using regression models. Ecological and morphological characteristics of these species were determined using a structural analysis. No single standard method estimated leaf biomass for all species on site due to the diversity of geometric shapes in these species. However, Adelaide, double sampling and the dimensional methods were the most precise, practical and simplest methods for measuring the forage leaf biomass of many shrub species. The linear models gave a better estimate of tree biomass than the logarithmic functions. The regression equations showed a close relationship between foliar biomass and growth parameters.     

Response of giant sequoia canopy foliage to elevated concentrations of atmospheric ozone

We examined the physiological response of foliage in the upper third of the canopy of 125-year-old giant sequoia (Sequoiadendron giganteum Buchholz.) trees to a 61-day exposure to 0.25x, 1x, 2x or 3x ambient ozone concentration. Four branch exposure chambers, one per ozone treatment, were installed on 1-m long secondary branches of each tree at a height of 34 m. No visible symptoms of foliar ozone damage were apparent throughout the 61-day exposure period and none of the ozone treatments affected branch growth. Despite the similarity in ozone concentrations in the branch chambers within a treatment, the trees exhibited different physiological responses to increasing ozone uptake. Differences in diurnal and seasonal patterns of g(s) among the trees led to a 2-fold greater ozone uptake in tree No. 2 compared with trees Nos. 1 and 3. Tree No. 3 had significantly higher CER and g(s) at 0.25x ambient ozone than trees Nos. 1 and 2, and g(s) and CER of tree No. 3 declined with increasing ozone uptake. The y-intercept of the regression for dark respiration versus ozone uptake was significantly lower for tree No. 2 than for trees Nos. 1 and 3. In the 0.25x and 1x ozone treatments, the chlorophyll concentration of current-year foliage of trees Nos. 1 and 2 was significantly higher than that of current-year foliage of tree No. 3. Chlorophyll concentration of current-year foliage on tree No. 1 did not decline with increasing ozone uptake. In all trees, total needle water potential decreased with increasing ozone uptake, but turgor was constant. Although tree No. 2 had the greatest ozone uptake, g(s) was highest and foliar chlorophyll concentration was lowest in tree No. 3 in the 0.25x and 1x ambient atmospheric ozone treatments.     

Effects of nutritional factors on frost hardening in Larix leptolepis (Sieb & Zucc.) Gord.

A method for estimating frost hardiness in seedlings of Larix leptolepis in their first stage of acclimation is demonstrated. Cuttings of the shoot tip were frozen linearly from +2°C to ‐36°C. The viability was determined by TTC‐assay. Data were fitted to a logistic regression model, and hardiness was calculated from the fitting parameters. It was shown that hardiness is influenced by the duration of the fertilizer application period. No effect of the nutrient status of N, P or K in the shoots was found.