农田灌溉节水水平,the level of water-saving agricultural irrigation
1)the level of water-saving agricultural irrigation农田灌溉节水水平
2)irrigation water农田灌溉水
1.A new method was developed for determination of tracing NO2-inirrigation water by ion chromatography with conductivity detection in this paper.本文建立了离子色谱法结合电导检测农田灌溉水中NO2-离子的新方法。
英文短句/例句
1.Method for calculating safe baseline of regional farmland irrigation water and its application;区域农田灌溉水数量安全底线测算方法及应用
2.Determination of Nitrite in Irrigation Water by Ion Chromatography离子色谱法测定农田灌溉水中亚硝酸盐
3.A new reservoir has been built to water 80 percent of the farmland.新建了一座水库，使80％的农田得以灌溉。
4.Study on Some Characteristics about Sewage Irrigation Farmland of Beijing Region;北京地区污水灌溉农田若干特征研究
5.Discussion on the Application Prospect of Irrigated Farmland with Reclaimed Water in Shanxi Province试论山西省再生水灌溉农田应用前景
6.Farmland Water-efficient Irrigation System Based on the ZigBee Technology基于ZigBee技术的农田节水灌溉系统
7.Changing of Water and Soil Environment before and after Water-saving Irrigation in Hetao Irrigation and the Simulation of Water and Fertilizer Efficiency in Farmland河套灌区节水溉灌溉前后水土环境变化及农田水肥效率模拟
8.Analysis of soil water characteristics of farmland under different winter storage irrigation in Hexi Region of Gansu Province甘肃河西地区不同储水灌溉和生育期灌溉农田水分特征分析
9.Irrigation Water Right Compensable Transfer and Countermeasures of Farmer s Benefits Protection;农田灌溉用水权有偿转让机制与农民受益研究
10.Investigation of Irrigated Water Qualities in Xinjiang Farmland and Discussion of Treatment Methods with It;新疆农田灌溉排水水质调查和其处理方法探讨
11.Analysis of Soil Water Characteristics of Farmland under Different Storage Irrigation in Hexi Region of Gansu Province甘肃河西地区不同储水灌溉农田水分特征分析
12.Impact of irrigating farmland increase production with water save on groundwater exploitation in the plain of Hutuo River basin灌溉农田节水增产对地下水开采量影响研究
13.Research on the Water Entitlement and Irrigation Organizational Institute;农田水利产权制度与灌溉组织制度探析
14.Research on the Water Entitlement and Irrigation Organization Institute;农田水利产权制度与灌溉组织制度研究
15.Study on Characteristics of Soil Phosphorus Transport and Transformation in the Farmland with Swine Wastewater Irrigation猪场废水灌溉农田土壤磷素迁移转化特征研究
16.Accumulation and Spatial Variability of Mn in Farmland Soil of Swine Waste-water Application猪场废水灌溉农田土壤Mn空间变异及积累分析
17.Problem of agricultural water conservation and irrigation in Liangqing district and countermeasure浅谈良庆区农田水利灌溉存在问题及对策
18.By , all the farmland and fruit gardens will be irrigated by water-saving equipment and the water for farm use should have a sharp decrease.农田、果林全部实现节水灌溉，农业用水明显减少；
相关短句/例句
irrigation water农田灌溉水
1.A new method was developed for determination of tracing NO2-inirrigation water by ion chromatography with conductivity detection in this paper.本文建立了离子色谱法结合电导检测农田灌溉水中NO2-离子的新方法。
3)return water of farmland irrigation农田灌溉退水
4)Agriculture irrigating water农田灌溉用水
5)sewage irrigation in farmland农田污水灌溉
6)Sewage irrigation farmland污水灌溉农田
延伸阅读
农田灌溉预报农田灌溉预报field irrigation forecastnongtian gua咆ai yubao农田灌溉预报(field irrigation foreeast)根据气象条件推算最适宜的农田灌溉时间和灌溉量的农业气象条件预报。它是农田科学管理的重要依据，是调节土壤水分，为农作物在各生育时期创造适宜水分条件、合理利用水分资源的基础工作。估算灌溉量应考虑灌溉期内能保证作物正常生长发育的需水量。需水量一般指在相应天气条件下能满足农田蒸散量达到最大值所需要的水量。计算灌水数量时，灌水量(d)，以毫米水深表示，指作物在当地土壤和气候条件下，土壤水分提高到田间持水量所需要灌的水量。任何作物可取用的水分，只是土壤最大有效水分(Sa)的一部分，即P·Sa，这里，力是作物最大可能蒸散量所耗去的水分占S。的百分数。P的大小视作物而异，有的作物能取用较多的水分，如棉花等;有的作物则较少，如马铃薯。很多作物的P值随生育阶段而异，且与作物蒸散强弱有关(见附表13)。p值在作物蒸散量(ETm)弱(蕊3毫米/日)时比蒸散量强()8毫米/日)时要大。这种情况，细密土壤比粗疏一壤更明显。灌水量等于整个根深D(米)的可取用水量。由于田间灌水的不均匀性，还需乘以灌溉效率系数Ea。(P。_(P·Sa)·D‘__、以一舀、11且11且z 乃aD的数值可参见附表12。表中的数值适用于ETm为5一6毫米/日的情况，其他情况下需作修正。根深a需根据作物的不同生育阶段而定。灌溉期(t)即水分能保证ETa一E‘m的时期，应根据作物需要和生产阶段来确定。在考虑灌溉方法作灌溉计划时，可用下式计算:(PSa)r-(勿昆小D od) ETm一上述方法，是从农田灌足水后开始计算的。如果从某一天实际土壤水分为S毫米时开始计算，则应以田间持水量减去S替换两式中的Sa。在附表中所列各参考数值是根据国际许多研究结果综合而成的，必要时，可根据其它资料和实验结果加以更换。计算中未包括可能出现的雨量，可用预报雨量作修正(见农田土壤水分预报)。(张宏名)
