搜索结果: 16-30 共查到“Drip irrigation”相关记录31条 . 查询时间(0.086 秒)
Diurnal Changes in Mineral Composition of Xylem Sap and Bleeding Rate at Harvest Stage in Pepper and Melon Cultivated by Drip Irrigation under Desert Condition in Baja California, Mexico
Bleeding rate Capsium annuum L Cucumis melo L Desert Mexico Root Soil temperature Xylem sap
2009/7/15
A project to improve the crop production in arid area is underway in Guerrero Negro, Baja California, Mexico as a joint enterprise of Japanese and Mexican Government. The objective of this project is ...
Novel System for High Quality and Stable Fruit Production of Satsuma Mandarin using a Drip Irrigation and Liquid Fertilization System with Year-round Plastic Mulching
National Agricultural Research Center for Western Region
2009/7/13
Novel growing system using drip irrigation and liquid fertilization system combined with year-round plastic mulching was developed, expecting high quality and stable fruit production of satsuma mandar...
Effects of Drip Irrigation and Liquid Fertilization System with Year-round Plastic Mulching on Fruit Production of Satsuma Mandarin
Fruit Production Drip Irrigation Satsuma Mandarin
2009/7/13
New cultivation system using drip irrigation and liquid fertilization methods combined with year-round plastic mulching was developed, expecting high quality and stable fruit production of satsuma man...
基于CAD的滴灌系统水力自动计算模型（Hydraulic Analysis Model in a CAD System for the Design of Drip Irrigation）
滴灌 水力计算 计算机辅助设计
2009/5/22
针对滴灌CAD系统中水力计算与管网布置的耦合问题，研究了管网图形识别及有效性判定，并基于AutoCAD二次开发思想，应用步进法水力学解析原理，建立了滴灌系统计算机辅助设计水力计算模型，有效地将管网图形与水力计算耦合，使水力计算结果及时反馈到管网图形中，为实际工程管网水力性能的优化提供了技术手段。通过算例对该模型进行了验证，结果表明，应用该模型计算出的流量和水头偏差率均在允许范围内，管网识别及水力计...
土壤质地对地下滴灌灌水器水力要素的影响（Effect of Different Textural Soils on Hydraulic Characteristics of Emitters under Subsurface Drip Irrigation）
地下滴灌 灌水器 土壤质地
2009/5/19
为研究不同质地土壤中灌水器水力要素的变化规律及其差异，选取灌水器工作压力、土壤容重和土壤初始含水率为因素，分别在粘土、壤土和砂土中采用混合水平均匀设计安排试验。试验结果表明，不同土壤中的灌水器出流规律一致：即当工作压力不变时，灌水器流量在灌水初期略大，而后减小并趋于恒定，这个变化过程仅1～2min；在相同压力下，地下滴灌灌水器流量比地表滴灌小5%～20%，压力越大，二者越接近；灌水器流量随工作压力...
虚拟节点有限元法解析滴灌支管水力学计算（Finite Element Method for Hydraulic Design of Drip Irrigation Submain Units with Virtual Emitter System）
滴灌 支管单元 有限元法
2009/5/19
滴灌支管和毛管组成的支管单元的水力学计算是滴灌管网水力学设计的关键环节。运用虚拟节点有限元法和虚拟节点平均水头损失有限元法解析支管单元的水力学计算，可以计算出支管和每根毛管的水头损失，同时显著减少计算量，研究结果为包含几十万乃至上百万个滴头的滴灌系统水力学设计提供了新的方法。
Soil moisture distribution pattern in Amaranthus cruentus field under drip irrigation system
Irrigation moisture deficit hydraulic charge moisture storage root zone
2009/3/4
The status, availability and distribution of moisture distribution within a crop’s root zone depths affect the yield and growth of crops. An experiment was carried out to determine the influence of ...
Evaluation of Sorghum Density As Affected By Two Water Qualities Under Drip Irrigation System
leaf water potential osmotic stress saline water
2009/2/25
Pot experiment was conducted under glasshouse conditions during 2005 at the Arid Land Research Center, Tottori University in Tottori, Japan. The study presented here was aimed to evaluating the respon...
The Effects of Different Growing Media on Yield, Quality and Growth of Tomato（Lycopersicon esculentum Mill.）Grown and Irrigated by Drip Irrigation Method Under the Greenhoues Conditions
Different Growing Media Yield Quality Tomato
2009/1/23
This study was carried out to determine the effects of drip irrigation and different growing media on growth, yield and quality of tomato grown in greenhouse conditions. Peat, sand, perlite and volcan...
Effects of Different Irrigation Programs on the Growth of Cotton Under Drip Irrigation
Drip irrigation Growth of cotton plant Leaf area index (LAI)
2009/1/14
This study was conducted to determine of effects the cotton plant growth of different irrigation programs in a drip system. The amount of water applied was based on free surface evaporation from a scr...
Development of a Mathematical Model Using Dimensional Analysis for Predicting the Friction Losses in Drip Irrigation Laterals with Cylindrical Type In-Line Emitters
Drip irrigation emitters friction loss mathematical model dimensional analysis
2009/1/13
This paper presents a prediction model developed using dimensional analysis for friction losses in drip irrigation laterals. Drip irrigation laterals with cylindrical type in-line emitters placed at d...
Water Application Uniformity of a Subsurface Drip Irrigation System at Various Operating Pressures and Tape Lengths
Subsurface drip irrigation emitter discharge uniformity coefficient emitter performance
2009/1/9
Subsurface irrigation has been the focus of attention mainly because of its low evaporation rate and deep percolation losses. Uniformity of water applications and its stability, however, are still a m...
Management of Cotton Grown Under Overhead Sprinkle and Sub-surface Drip Irrigation
Management Cotton Grown Overhead Sprinkle Sub-surface Drip Irrigation
2008/12/15
Irrigation improves the consistency of cotton (Gossypium hirsutum L.) yield during seasons with inadequate or poor rainfall distribution, but comparisons of irrigation methods, including overhead spri...
Microbial transport in soil caused by surface and subsurface drip irrigation with treated wastewater
bacteriophage fecal coliforms irrigation soil wastewater
2008/11/26
The objective of this work was to compare and simulate transport and fate of microorganisms from wastewater for surface and subsurface irrigation methods. Adsorption isotherms and water-content depend...
Determination of the head losses in metal body disc filters used in drip irrigation systems
Drip irrigation disc filter filtration head loss
2010/1/11
The objective of this study was to determine the head losses in several type metal body disc filters manufactured by domestic companies. In order to meet the objective, three different filter designs ...