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甘肃省胡麻生态气候分析及种植区划 总被引：9，自引：2，他引：9
根据甘肃省各地胡麻生物和气候特性,运用统计学方法,分析了不同气象因子对胡麻产量的影响,确定了胡麻生态气候适生种植区划综合指标,依此对甘肃省胡麻进行适生区划,并分区评述,同时提出合理利用气候资源途径. 相似文献
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基于GIS的浙江省茶树栽培气候区划 总被引：17，自引：3，他引：14
根据茶树生长发育与气候条件的关系,确定了茶树栽培的气候生态区划指标。借助浙江省1∶25万地形数据,应用GIS技术,按种植茶树的气候适宜性把浙江省茶树栽培区划分为最适宜栽培区、适宜栽培区、次适宜栽培区和不适宜区。 相似文献
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为给云南大麦种植提供更为客观、科学的理论依据,根据云南干季(11月至4月)降雨量、气温(积温)和日照时数的时间、空间分布与大麦生长适应性之间的关系,利用统计分析软件SPSS中的主成分分析和动态逐步聚类方法与GIS技术结合,对云南大麦种植区进行气候生态类型区划和评价.结果表明,云南大麦气候生态类型可划分为中北部半干旱大麦种植区、中南部富热湿润大麦种植麦区、东部半湿润大麦种植区和西北部温暖湿润大麦种植区,其中中北部半干旱大麦种植区是云南大麦最适宜和优先发展种植区. 相似文献
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本文在系统分析咖啡的生物学特性和生态适宜性条件的基础上，选取了与咖啡种植关系密切的五个农业气候因子作为依据，应用模糊数学方法，确定了云南热区各地各气候因子以咖啡种植的气候适宜度（录属函数），以及可作为区划指标的清晰度，根据分析结果，得出云南热区咖啡种植气卢条件的适宜性区划，试图探讨一种适用于单项作物区划的新方法。 相似文献
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福建省莆田、 云霄等 4 市县枇杷 GIS 技术精细区划 总被引：2，自引：0，他引：2
在福建, 影响枇杷生产的关键气候条件是极端最低气温值（JDW）的高低。 文章围绕关键气候条件的分析,拟定该项精细区划的技术工作流程、 建立 JDW 的地理分布推算模式、 确定精细区划的地形气候指标, 结合土地利用现状等其它条件, 运用地理信息系统（GIS）技术进行精细区划。 根据区划结果, 进行当地枇杷布局的个例分析, 为进一步发展枇杷产业提供参考意见。 相似文献
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本文运用多元统计方法,将山西省种植大豆地区,划分为三大生态区八个亚区;同时研究了大豆生态类型在生态区中的分布。研究表明:山西省气候生态环境复杂,区划只能分块不能分带。大豆生态类型的分布具有明显的地域性,但一个区中可以种植若干个生态类型,且随着生态区由北向南的推移,各区所包括的类型渐趋复杂。分析表明:多元分析方法是大豆生态分类与分区的一种行之有效的方法,也可运用于其他作物。 相似文献
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云南河口地区龙眼生产气候区域探讨 总被引：1，自引：0，他引：1
根据龙眼生长发育的主要气候指标，对河口地区影响龙眼生长发育的主要气候因子作回归分析，提出了河口地区龙眼生产气候条件的适宜性区划，区划为最适宜，适宜，次适宜和不适宜区。 相似文献
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李友华 《中国油料作物学报》1986,(1)
我国南方春大豆产区,包括北纬32度(江苏可到33度,下同)以南的长江汉水中下游沿岸及其以南的广大地区和四川、贵州及云南省的部份地区。本区的地貌极为复杂,气候差异较大,种植制度多样,因而形成了多种生态条件,及其相适应的春大豆品种生态类型。鉴于本区春大豆品种生态特点、生态类型、生态分布及品种区划等的系统研究尚未开展,对指导本区春大豆育种和引种工作的研究未见专题报导。本文根据1975—1978年春大豆品种多点联 相似文献
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This study aimed to identify new sources of resistance to Verticillium wilt in olive. We evaluated various types of genotypes: wild olive trees (Olea europaea subsp. europaea var. sylvestris), genotypes belonging to related subspecie (Olea europaea subsp. guanchica) and genotypes coming from crosses between Picual cultivar and wild olive trees. Fifty-six genotypes were inoculated by dipping roots and then screened under controlled conditions to test their resistance to a highly virulent Defoliating isolate of Verticillium dahliae. Picual (susceptible) and Frantoio (resistant) were control cultivars. Wide variability and significant differences were obtained in the evaluated disease parameters. The Relative Susceptibility Index (RSI), summarizing the disease parameters, was used for final classification of genotypes. Thirteen genotypes were categorized as resistant: eight wild olives from different locations, two genotypes belonging to subsp. guanchica populations from Canary Islands and three genotypes obtained from one of the crosses Picual x wild. The identification of high levels of resistance to V. dahliae among wild olive genotypes may be helpful for the management of this disease. The resistant genotypes could be used as rootstocks for susceptible olive cultivars or parents in future breeding programs. 相似文献
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Imen Blibech Mohieddine KsantiniIkbal Chaieb Brahim JlassiAli Rhouma Samir JaouaSami Aifa 《Crop Protection》2012,31(1):72-77
The occurrence of Bacillus entomopathogenic bacteria on a Tunisian biodynamic farm was determined by examining 75 samples from olive tree (Olea europaea L.) habitats. A total of 40 Bacillus isolates were characterized according to their phenotypic, physiological and biochemical parameters. Isolates of the species Bacillus subtilis, Bacillus mycoides, Brevibacillus brevis, Paenibacillus polymyxa, Bacillus licheniformis, Bacillus sp. (1), Bacillus sp. (2) and a standard strain Btk HD-1 were used separately in feeding bioassays on fresh artificial diet against larvae of lepidopterans Prays oleae (Bernard) and Palpita unionalis (Hübner) and coleopterans Hylesinus oleiperda (F.) and Phloeotribus scarabaeoides (Bernard), which are olive tree pests. Larvae were successfully reared on an artificial diet with 25 g powdered olive tree leaves. Compared to the control data, only Btk and the isolates of B. licheniformis, P. polymyxa and B. brevis were entomopathogenic. Larval mortality assessed 7 days post-treatment showed high mortality rates with Btk to lepidopteran larvae (86.6% for P. oleae and 80.9% for P. unionalis) and low mortality against coleopteran pests. B. brevis isolates showed high mortality rates against P. oleae (up to 67.9%). B. licheniformis isolates caused up to 59.2% larval mortality for P. oleae and 43.6% for P. unionalis. Highest coleopteran mortality was achieved by P. polymyxa isolates (up to 55%). According to the 16S rDNA results, isolates of each of the three entomopathogenic strains were similar. Proteins in the strain supernatants were toxic to P. oleae larvae with LC50 values of 10.0 (B. brevis), 12.5 (B. licheniformis) and 37.6 μg/ml (P. polymyxa). Also, P. polymyxa showed an LC50 of 12.4 mg/l against P. scarabaeoides. Our results suggest that entomopathogenic Bacillus present locally in the biodynamic farm could be used in biological control programmes of olive tree pests. 相似文献
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Fares R Bazzi S Baydoun SE Abdel-Massih RM 《Plant foods for human nutrition (Dordrecht, Netherlands)》2011,66(1):58-63
It is becoming increasingly evident that certain phytochemicals possess cancer chemopreventive properties. In this study,
the anti-proliferative activity of plant extracts from olive (Olea europaea L.) leaves was tested on human leukemic cell line (Jurkat). Cytotoxicity of various concentrations of plant extracts was examined
and the IC50 was determined. Olive leaf extracts showed concentration-dependent anti-proliferative effect as determined by the WST-1 proliferation
kit and [3H]-thymidine incorporation method. To study whether cell death was due to apoptosis, cells were stained with Annexin V-FITC
and PI and the expression of important regulatory proteins (Bcl-2, Bax, and p53) involved in apoptosis were examined by Western
blot. The antioxidant activity of olive leaves (SC50 = 0.1 mg dry weight) was studied using the DPPH scavenging method. Present findings suggest that olive leaves extracts exhibit
anti-proliferative effect on leukemic cells by inducing apoptosis. 相似文献
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《Industrial Crops and Products》2007,25(2):160-168
The objective of this work was to study the feasibility of using phosphoric acid to hydrolyze the hemicellulosic fraction of olive tree pruning, as a step in the bioconversion process to produce ethanol. Milled olive tree pruning was submitted to hydrolysis at 90 °C by phosphoric acid in a concentration range 0.3–8N for 240 min. The hydrolysates were then fermented by Pachysolen tannophilus. The hydrolysis stage was evaluated by the evolution of glucose and reducing sugars generated and by the conversion of hemicellulose fraction. The main parameters determined in the fermentation were: maximum specific growth rate, specific substrate consumption rate, specific ethanol production rate and ethanol yield. The maximum ethanol yield (0.38 kg/kg, equivalent to 74.5% of the theoretical yield) was obtained when hydrolysing with 0.5N phosphoric acid. Hemicellulose conversion is however incomplete at these operational conditions. Higher acid concentrations lead to higher hydrolysis of hemicellulose, but the ethanol yields resulting from the fermentation are lower. 相似文献
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The purpose of this study was to analyze the propriety of establishing riparian greenspace for watersheds of four major rivers in South Korea and suggest strategies for improving the analyzed problems. Growth environments, vegetation structures, planting techniques, and tree growth and management conditions were analyzed targeting 45 sites. Soils at the sites had organic matter of 1.3 % and cation exchange capacity of 4.4 cmol+/kg, which are poor conditions for tree growth. A tree diameter at breast height of <7 cm accounted for 77 % of all trees planted, and mean tree cover was only 28 % due to planting of mainly small trees. Planting techniques were represented by single-layered planting (84 %) consisting of a single species or a few species in similar size. Approximately 11 % of all planted trees withered, and many trees had poor growth. The growth ratios for shoot and leaf length in planted trees compared with normally growing trees were 57 and 77 %, respectively. Oppression by invasion of herbaceous and climbing plants associated with negligent maintenance hindered normal tree growth at some sites. Strategies to improve these problems and promote the function of riparian greenspaces suggest securing a minimum width and connectivity of greenspace, analyzing growth ground prior to planting, improving the soil environment, woodchip mulching on ground surfaces, middle/high density plantings mixed with fast-growing trees, edge planting to protect internal growth environment, and multilayered and grouped ecological planting reflecting natural riparian forest structures. 相似文献
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G. J. A. Ryle 《Grass and Forage Science》1970,25(1):20-29
Two contrasting levels of N were applied in natrient solution to dense stands of cocksfoot plants grown in tins in controlled-environment cabinets. During a 12-week period of growth in a constant environment a full growth analysis was carried out. High N caused a three- or four-fold increase in total dry weight per unit area by doubling shoot number and increasing shoot weight by approximately 60%. The increase in shoot weight arose mainly from a large Increase in leaf and sheath weight per shoot; root weight per shoot was for the most part negatively affected by high N. The large positive effect of N on leaf weight resulted from the development of slightly wider and much longer leaves, which had a similar or greater weight per unit area of leaf than equivalent leaves from the low-N treatment. The effect of high N on total dry weight was the consequence of a superior NAR and, in the first half of the experiment, a superior LAR. The physiological implications of the effects of high levels of applied N on DM production in the field are discussed. ice and analyses. 相似文献