搜索结果: 16-30 共查到“知识库 农业资源利用”相关记录608条 . 查询时间(0.594 秒)
俄罗斯黄花草木樨生物活性成分资源的分布与开发利用
黄花草木樨 活性成分资源 分布特征 开发利用
2017/11/13
为了查明生物活性成分在黄花草木樨根、茎、叶、子中的含量与分布特征,本研究重点开展了黄花草木樨活性成分的检测及田间开发试验。分别采用凯式定氮法和高效气相色谱法测蛋白质；氨基酸自动分析仪法测氨基酸；气相色谱-质谱、分子蒸馏仪检测脂肪酸；重量法检测皂苷与生物碱；高效液相色谱仪检测香豆素；福林试剂比色法检测多酚；蒽铜-硫酸比色法检测多糖；亚硝酸钠-硝酸铝-氢氧化钠比色法检测黄酮。按产量测算后,得出每公顷牧...
巴丹吉林沙漠边缘地带植物区系及其资源利用
植物区系成分 植被资源 巴丹吉林沙漠
2016/12/23
分析巴丹吉林沙漠边缘地区植物区系及植被资源利用，为日后巴丹吉林沙漠区域的植被恢复、保护和利用提供理论依据和参考。[方法] 以植物地理学的原理和方法，结合实地调查情况，对巴丹吉林沙漠边缘特殊生境的植物区系组成、区系分布进行系统的讨论，划分该区植被资源类型并且提出保护措施和利用方法。[结果] 巴丹吉林沙漠边缘地区植被为典型的荒漠植被，共记录植物13科30属32种，其中裸子植物1科1属1种，被子植物12...
BENTHIC HABITAT MAPPING AND BIODIVERSITY ANALYSIS IN THE PRIMEIRAS AND SEGUNDAS ARCHIPELAGO RESERVE
Very high resolution remote sensing Object-based image classification
2015/5/7
The Primeiras and Segundas Archipelago Reserve is a recently established marine protected area, the largest in Africa, located in the waters of Northern Mozambique. This protected area is of signifi...
Computation method of the drainage retention capacity of soil layers with a subsurface pipe drainage system
agricultural areas groundwater reservoir hydrological extremes unsteady-state groundwater conditions
2015/3/13
Methodological procedure for determining the drainage retention capacity (DRC) of surface layers under conditions of unsteady-state groundwater flow was demonstrated. DRC of the drainage system can be...
Impact of water quality, cultivation, and cropping systems on infiltration and physical properties of an arid clay soil
aggregate stability crop cover infiltration tillage wastewater
2015/3/10
Irrigation with treated wastewater is essential for increasing crop production in arid and semi arid regions. Field experiments were conducted on rainfed clayey soil to investigate the impact of water...
Field performance evaluation of micro irrigation systems in Iran
emitter clogging emission uniformity statistical uniformity
2015/3/10
The efforts to introduce the micro irrigation system in Iran go back as far as the year 1990. The area under micro irrigation system in Iran covers about 400 000 ha and it is estimated to double (800 ...
Application of k-Nearest code to the improvement of class pedotransfer functions and countrywide Field Capacity and Wilting Point maps
field capacity k-Nearest neighbour technique pedotransfer functions wilting point
2015/3/10
The database of soil hydrophysical properties in the Czech Republic (HYPRESCZ) which contains the data needed for derivation of pedotransfer functions for soil water retention curves was used for the ...
Soil organic carbon dynamics and its influence on the soil erodibility factor
agrotechnical erosion control measures soil erodibility factor soil erosion soil organic carbon
2015/3/5
The effect of erosion and erosion control measures on changes in the amount of organic matter in soil was studied. We investigated the influence of organic matter inputs into the soil on surface runof...
Simulation of soil organic carbon changes in Slovak arable land and their environmental aspects
agricultural management long-term simulation RothC model soil organic carbon soil quality
2015/3/5
One of the key goals of the Thematic Strategy for Soil Protection is to maintain and improve soil organic carbon (SOC) stocks. A decline of SOC stocks is politically perceived as a serious threat to s...
Field evaluation of various mathematical models for furrow and border irrigation systems
border irrigation furrow irrigation mathematical models SIRMOD
2015/3/3
In this study, three mathematical models in the SIRMOD package including the hydrodynamic (HD), zero inertia (ZI), and kinematic wave (KW) models were tested using the data from several field experime...
Point irrigation design for experimental field in northern part of Gobi desert in Mongolia
bilateral project desert discharge distribution uniformity Excel HYBOZAM hydraulics PC program subsurface point irrigation surface point irrigation underground water
2015/3/3
The present paper focuses on the point irrigation design for crops and growing vegetables on an experimental area 2432 m2 at Buchel locality, Northern part of Gobi desert in Mongolia. An underground w...
Water use, growth, and yield of drip irrigated cassava in a humid tropical environment
cassava drip irrigation irrigation regimes soil-water regimes supplemental irrigation water use water use efficiency yields
2015/3/3
Field experiments were conducted at the Agricultural Engineering Experimental Farm of The Federal University of Technology, Akure, during 2006/2007 and 2007/2008 seasons to investigate the response of...
Impact of Arable Land to Grassland Conversion on the Vegetation-period Water Balance of a Small Agricultural Catchment (Němčicky Stream)
hydrological extremes hydrological modelling land use change water balance
2015/3/2
This paper presents results of decadal (10-day) water balance simulations for the vegetation periods (April to October) of 2001 (normal year), 2002 (wet year) and 2003 (dry year) in the Němčicky ...
Application of RothC model to predict soil organic carbon stock on agricultural soils of Slovakia
agricultural land RothC Slovakia soil organic carbon
2015/3/2
Soil organic matter (SOM) takes part in many environmental functions and, depending on the conditions, it can be a source or a sink of the greenhouse gases. Presently, the changes in soil organic carb...
Evaluation of soil temperatures at agroclimatological station Pohořelice
soil temperature agroclimatology soil characteristics
2015/2/4
Soil temperatures were analysed for the climatological station Pohořelice during the period of 1961–2000. According to the agroclimatic zoning, this region is a part of warm macroarea, mainly war...