农田水量平衡,field water balance
1)field water balance农田水量平衡
1.Afield water balance model has been developed in this paper.建立了一个农田水量平衡模型。
2.Based on the cropping pattern in ,the regionalfield water balance was evaluated too.本文利用FAO56灌溉分册推荐的作物系数法计算了京郊地区20个站点近46年10种主要农作物的需水量,并计算了需水量与亏水量的变化趋势,并以北京种植结构为基础,对自然状态下的农田水量平衡状况进行了分析。
英文短句/例句
1.Water Balance, Transition and Crop Productivity in Red Soil Farmland;红壤农田水量平衡和水分转换及作物的生产力
2.Field Water Balance in Dryland of North Weihe and Regulating Technologies;渭北旱原农田水量平衡及其调控技术研究
3.Characters of Water Requirement for Main Crops and Field Water Balance in Beijing Region京郊地区主要农作物需水特征与农田水量平衡分析
4.Evaluation of Different Cotton Irrigation Scheduling by Using Field Water Balance Model利用农田水量平衡模型评价棉田不同的灌溉制度
5.Based on the principle of water balance on farmland, a simulation model for agricultural drought under condition of irrigation is proposed.根据农田水量平衡原理,建立了灌溉条件下的干旱模拟模型。
parison of Water Balance and Crop Response between Plain and Terrace in the Hill-Gully Region of Loess Plateau;黄土丘陵沟壑区两种立地条件下农田水量平衡及作物反应的比较研究
7.Spatio-temporal Variability of Soil Water and Water Balance Analysis in Field;农田土壤水分时空变异特征及水量平衡分析
8.Quantitative Evaluation of Water and Nitrogen under Winter Wheat-Summer Maize Cropping System in Irrigative Field;冬小麦—夏玉米轮作下灌溉农田水氮平衡的定量评价
9.Effects of nitrogen fertilization and irrigation rate on grain yield,nitrate accumulation and nitrogen balance on sandy farmland in the marginal oasis in the middle of Heihe River basin水氮配合对绿洲沙地农田玉米产量、土壤硝态氮和氮平衡的影响
10.Study on Water-salt Balance and Water Requirement of Salt-leaching of Drip Irrigation under Mulching for Cotton Field膜下滴灌棉田水盐平衡及淋盐需水量研究
11.The Characteristics and Simulation of Energy Balance and Micrometeorological Variables and Surface Radiation;农田冠层能量平衡和小气候要素的特征与模拟
12.The effects of long-term fertilization on crop yields and farmland nutrient equilibrium长期施肥对华北平原潮土作物产量及农田养分平衡的影响
13.Water and Heat Balance and Water Use of Shrub Grassland and Crop Fields in Lhasa River Valley拉萨河谷灌丛草原与农田水热平衡及植被水分利用特征
14.Heat Balance of Cold Type Wheat under Drought Conditions and Microclimate Characteristics干旱条件下冷型小麦的农田热量平衡及小气候特征
15.acres of level farmland.好几亩水平的农田。
16.Calculation for Equilibrium Silt Concentration,Equilibrium Depth and Seabed Evolution平衡含沙量、平衡水深与海床冲淤计算
17.Living Standard Measurement Study Programme生活水平衡量研究方案
18.Analysis of Energy Balance Closure of Shouxian Wheat Field寿县地区麦田能量平衡闭合状况分析
相关短句/例句
field water budget农田水量平衡
1.Based on the field observing data, afield water budget model was developed in this paper,and its sensibility to the water extraction function by roots and evapotranspiration form were studied.以田间试验资料为基础，建立了一个农田水量平衡模型，探讨了它对作物根系吸水函数和蒸散公式的敏感性。
3)farmland water balance model农田水量平衡模型
4)field water balance农田水分平衡
1.Ningxia Plain lies in droughty area and facing crisis of water lack, this paper study thefield water balance under natural regulation namedfield water balance using field water resource balance equation, the research estimated monthlyfield water balance of 8 major crops for all of the12 counties in Ningxia Plain for a period of 1960-2001.本文以宁夏平原为案例,对天然状态下的农田水分平衡状况进行了深入的定量研究,采用长系列(1961～2001年)、短时段(月)和多种作物类型(8种)相匹配的操作方法,建立农田水量平衡模型,计算得到了宁夏平原各个县域单元、各种作物、逐年、逐月的有效降水、盈水量、亏水量值。
2.Researches on thefield water balance in Gansu province have been carried out with an accurate soil-water balance model,taking land use and the precipitation into account along with comparisons of water demand and deficits of different crops.采用农田水量平衡模型,以县域为基本单元,对甘肃省1961～2001年10种作物逐月天然状态下农田水分平衡时空分布规律进行了研究。
5)field water balance田间水量平衡
1.Application of water stress coefficient from FAO56 to thefield water balance analysis;FAO56计算水分胁迫系数的方法在田间水量平衡分析中的应用
6)water balance of paddy field稻田水量平衡
延伸阅读
农田水量平衡计算农田水量平衡计算estimate of water balance in farmlandnongtian shuijiang Pjngheng jisuan农田水量平衡计算(estimate of waterbalanee in farmland)一定时段内农[H来水量和去水量之间的平衡计算。可用如下方程表示: △环厂二艺风一艺1私〕式中△环为农田盈亏水量;艺下仁为农田各项来水量之和;艺讯为农田各项去水量之和。应用水量平衡方程，可以分析农田水分状况，找出农田水分盈亏的原因，确定灌溉排水措施。不同类型的农田，或不同的研究目的，可以针对不同的时段和不同的农田空间部位进行分析。水稻田的水量平衡用水量平衡方程研究水稻田水分状况时，可以针对一定时段‘t)建立田面上的水量一平衡方程式: △环兰hZ一hl二M+尸.‘t一st一C式中h，、hZ分别为时段初和时段末田面水层深度;M为时段内灌溉水量;尸为时段内降雨量;e为时段内平均田间需水强度(单位时间需水量);s为时段平均渗漏强度(单位时间渗漏量);t为时段长;C为时段内排水量。几么尸是来水量，et.st和C是去水量，利用这个水量平衡方程式，根据各项参数的观测和预报，可以确定水稻田的灌溉制度、排水时间及排水量。泡田期，hl为泡田开始田面原有水层深度，扬是泡田末即栽秧时要求的田面水层深度，e为稻田水面蒸发强度。当降雨量及各项去水量已知时，可计算出泡田定额观。在栽秧后的生长期内，不同生长阶段对水分的要求不同，每一阶段有一个适宜水层深度上限hmax和下限hmin，降雨时可以将上限提高到允许最大蓄水深度h*以便充分利用雨水。用水量平衡法拟定水稻灌溉制度时，首先将水稻生长期划分为若干时段，并对每一时段进行水量平衡分析。如某时段h，、尸、et及St已知，若介，+尸一(，t一st
