搜索结果: 1-15 共查到“农学总论 parameters”相关记录47条 . 查询时间(0.14 秒)
The effects of borax on milk yield and selected metabolic parameters in Austrian Simmental (Fleckvieh) cows
boron Austrian Simmental (Fleckvieh) lipid profile milk yield
2015/4/30
This study was conducted to determine the effects of orally administered borax on milk yield and on several blood variables related to metabolism in early lactation in Austrian Simmental cows (Fleckvi...
Impact of water temperature and structural parameters on the hydraulic labyrinth-channel emitter performance
manufacturer’s coefficient of variation emission uniformity
2014/10/28
The effects of water temperature and structural parameters of a labyrinth emitter on drip irrigation hydraulic performance were investigated. The inside structural parameters of the trapezoidal labyri...
Improving performance parameters of combustion engine for racing purposes
engine performance parameters turbocharger roller dynamometer
2014/9/22
Mechanical parts of stock engine have a performance reserve which could be utilized when the engine is used under the race conditions. Especially normal turbocharged engines have their performance par...
Bio-Organic Farming of Grain Sorghum and its Effect on Growth, Physiological and Yield Parameters and Antioxidant Enzymes Activity
Bio-organic farming grain sorghum yield antioxidant enzymes activity
2010/11/15
The effect of interaction between sorghum cultivars and bio-fertilizer showed a significant
effect on all parameters under study except specific leaf weight, it is obvious from the results that Dorad...
INFLUENCE OF METEOROLOGICAL PARAMETERS IN HOURLY PATTERNS OF GRASS (POACEAE) POLLEN CONCENTRATIONS
aerobiology Poaceae pollination meteorology pollen allergy hourly patterns
2010/12/22
Hourly grass pollen concentrations were recorded over a 10-year study period at an aerobiological station of Badajoz (SW Spain). The record was carried out by means of a Burkard spore trap.
Parameters Governing Sexuality in Two Aspergillus Species
Fatty acids secondary metabolites RAPD-PCR cleistothecia
2010/11/15
Random amplification of polymorphic DNA (RAPD), Fatty acid and secondary metabolite
profiles were performed for four Aspergillus isolates; two cleistothecia producing isolates (Emercilla nidulans and...
Quality parameters and total phenolic content in tomato fruits regarding cultivar and microclimatic conditions
Color cultivars firmness growing conditions tomato total phenols
2011/3/29
The aim of this research was to evaluate the color, firmness, and total phenolic (TP) content in tomatoes
according to cultivar and growing conditions. Cultivars with oval, elongated, round, and cher...
根系吸水模型参数的混合遗传算法估算方法（Inverse Method Estimating Root Water Uptake Model Parameters Using Hybrid Genetic Algorithms）
根系吸水模型 参数优化 混合遗传算法
2009/9/11
构建了遗传算法与Levenberg-Marquardt算法相结合的混合遗传算法，用于求解根系吸水模型参数。分别进行数值试验和棉花根系吸水试验对混合遗传算法求解精度进行验证。数值试验表明，采用混合遗传算法优化求解根系吸水模型参数的优化值具有较高的精度，含水率资料的时间步长和空间步长对根系吸水模型参数的优化精度有较大影响，在实际中时间步长可取值5～10d，空间步长取值5～10cm。对室内棉花根系吸水进...
热激法修饰瑞士乳杆菌的参数优化与特性研究（Parameters Optimization and Properties for Lactobacillus helveticus by Heat-shock Treatment）
瑞士乳杆菌 热激处理 特性
2009/9/11
采用不同热处理温度(67、70℃)与时间(10、15、20s)对瑞士乳杆菌（Lactobacillus helveticus）进行热激修饰，研究处理前后与干酪加工相关的菌体特性，同时对热激修饰条件参数进行优化。研究结果表明，菌体经70℃、10?s热激处理后，菌体存活率、动态产酸能力、蛋白水解能力等指标符合热激要求，经修饰后的菌株适宜作为干酪促熟酶源。采用扫描电镜对细菌表面微观结构的观察结果表明，热...
Transient Expression of Green Fluorescent Protein in Rice Calluses:Optimization of Parameters for Helios Gene Gun Device
Helios gene gun Particle bombardment Rice Synthetic green fluorescent protein Transient expression
2009/7/21
An optimized condition for particle bombardment is necessary for efficient genetic transformation. Parameters for Helios gene gun, the new system for nucleic acid delivery which is mainly consists of...
Assessment of Infiltration Rate Parameters for Water Management in Reclaimed Area
infiltration parameters infiltration rate water management Kriging techniques
2010/11/12
The rapid progress and development of agriculture in Egypt aim towards the expansion of
agricultural land, the utilization of all water sources and the increase in crop production to meet the needs o...
THE DETERMINATION OF PARAMETERS OF MULTI-STEP ADSORPTION ISOTHERM BY SEQUENTIAL SIMPLEX OPTIMIZATION
Regression model adsorption pesticide soil
2010/3/26
The nutrient and toxic compounds can be adsorbed on the surface of soil colloids. Investigating the adsorption of some pesticide compounds, instead of the simply asymptotic Langmuir isotherm multistep...
GENETIC PARAMETERS FOR GROWTH TRAITS OF THE HUNGARIAN MERINO AND MEAT SHEEP BREEDS IN HUNGARY
weaning weight average daily gain heritability genetic correlation sheep
2010/3/25
Heritabilities and genetic correlations between weaning weight (WW) and average daily gain
(ADG) for the Hungarian Merino, Ile de France, Charollais, German Mutton Merino, German
Blackheaded, Texel,...
Accessibility of most frequently used physical parameters of soil structure, reliability of measured values, lack of replicates andways out of this dilemma
bulk density saturated hydraulic conductivity limited data-sets outflanking techniques
2008/11/26
Assessment of soil structure and still more its changes is impeded by peculiarities of sampling and measurement. Unavoidable local destructions tend to advance use of small numbers of replicates, samp...
Assessment of the influence of selected operating parameters of S071/B KRUK seederon seeding Sida hermaphrodita Rusby seeds**
precision seeder Sida hermaphrodita Rusby
2008/11/26
This paper presents the results of research on the
quality of seeding Sida hermaphrodita Rusby (Virginia fanpetals)
seeds with the S071 KRUK precision seeder in field conditions. It
was observed th...