搜索结果: 1-15 共查到“农学 construction”相关记录24条 . 查询时间(0.116 秒)
白建江(2021)SLAF-Based linkage map construction and QTL mapping of nitrogen use efficiency in rice (Oryza sativa L.) (图)
氮素 水稻 Nipponbare OM052 氮肥利用率
2023/2/27
氮素是植物生长发育所需的大量元素之一,水稻是我国的主要粮食作物,水稻生产对氮的需求仅次于水,是构成水稻生长成本的主要部分。目前,水稻氮肥表观利用率只有39%,即施氮肥量的50%以上残留在环境中。因此,在保证产量不减的基础上如何提高氮肥的利用效率,减少氮肥的使用量是我国农业可持续发展亟待解决的重要问题。
CONSTRUCTION AND APPLICATION OF ENHANCED REMOTE SENSING ECOLOGICAL INDEX
Enhanced Remote Sensing Ecological Index Ecosystem Ecological Environment Quality
2018/5/15
In order to monitor the change of regional ecological environment quality, this paper use MODIS and DMSP / OLS remote sensing data, from the production capacity, external disturbance changes and human...
Predicting the earthwork width and determining the annual growth loss due to forest road construction using artificial neural network and ArcGIS
area of road earthwork hillside slope roadside rock share
2016/8/2
The area of forest destruction as well as the annual growth loss due to road construction before constructing a road was predicted. To do this, road cross sections of 88 points along the 10 km propose...
Determining an optimal path for forest road construction using Dijkstra’s algorithm
selecting path nodes links Nahar Khvoran forest
2016/7/6
From an economic point of view a well-designed road path with the minimum construction cost is an optimal path that can be found using Dijkstra’s algorithm. In this study Dijkstra’s algorithm that con...
Effects of the construction of a reservoir on the fish assemblage in an inflow river
riverine fish assemblage development Czech Republic reservoir tributary electrofishing
2015/6/5
The construction of the Římov Reservoir on the Malše River in 1978 significantly influenced the fish assemblage within the river, above the reservoir. Fish species that had successfully colo...
Economics of a hydraulic hammer for forest road construction in a mountainous area
hydraulic hammer rock disintegration cut slope productivity costs
2015/3/27
This research deals with productivity and cost of rock disintegration and side casting of materials with the use of a hydraulic hammer mounted on a PC 220 Komatsu crawler excavator, which is used on r...
Assessing the bending strength and modulus of elasticity in bending of exterior foiled plywoods in relation to their construction
plywood density surface density moisture thickness bending strength modulus of elasticity in bending veneer statistical analysis
2015/2/6
The paper summarizes results of an institutional research aimed at assessing the bending strength and modulus of elasticity in bending of exterior foiled combined and all-beech plywoods in relation to...
Data Build-up for the Construction of Korean Specific Greenhouse Gas Emission Inventory in Livestock Categories
Greenhouse Gases Livestock Manure Methane Nitrous Oxide
2016/5/16
Many studies on methane (CH4) and nitrous oxide (N2O) emissions from livestock industries have revealed that livestock production directly contributes to greenhouse gas (GHG) emissions through enteric...
Current status and prospects of new house construction materials from bamboo
Current status prospects
2014/5/6
Bamboo is widely recognized as one of the most important non-timber forest resources because of the high socio-economic benefits from bamboo based products. It is estimated that there are over 1200 sp...
Relationship between Dwarf-bamboo Growth and Small Rodents on Mt. Ohdaigahara,Central Japan,with Special Reference to Construction of Deer-proof Fences
deer-proof fence dwarf-bamboo Mt.Ohdaigahara sika deer small rodent
2009/8/28
We examined the relationship between dwarf-bamboo growth and small rodents on Mt. Ohdaigahara where the population density of sika deer (Cervus nippon) has been increasing and trunk debarking by the d...
Construction of a Volume Table for Evergreen Broad-leaved Trees with Pipe Model Theory and Relative Stem Curve: A Case Study in the Tokyo University Forest in Chiba,Japan
branch broad-leaved tree pipe model relative stem curve volume table
2009/8/28
In this paper we constructed a volume table for broad-leaved trees including a stem and branches using a relative stem curve, provided that the trees are subject to the pipe model theory. First we mea...
Application of the Local Yield Table Construction System to a Timber Self-Supply Production Strategy in Ise Shrine Forest with Special Focus on the Shikinen Sengu Ceremony
growth model Ise Shrine large-timber production Local Yield Table Construction System Shikinen Sengu Ceremony
2009/8/24
The Forestry Department of the Ise Shrine is planning to produce timbers in the Ise Shrine Forest to rebuild the temples for the Shikinen Sengu Ceremony held every 20 years. Thus, this study proposes ...
Construction of Crown and Definite Diameter Height Control Diagram of Young Cryptomeria japonica Stand
clear length crown control Cryptomeria japonica definite diameter height stand density
2009/8/21
A control diagram of crown and stem form was attempted to construct based on the analysis of relationships among several stand characteristics. The data was collected from 32 young even-aged stands of...
Construction of tea production system in conformity with the standardization of nitrate nitrogen concentration in the environment
tea production system conformity nitrate nitrogen concentration
2009/7/15
Construction of tea production system in conformity with the standardization of nitrate nitrogen concentration in the environment.
Construction and Use of Pedigree Analysis Web
Pedigree analysis Coefficient of parentage Coefficient of inbreeding Crossing record
2009/7/7
An online web service system for a pedigree analysis was constructed. In this service, coefficients of parentage, inbreeding coefficients, numbers of ancestors in the pedigree, etc., are calculated ...