查询词典 subsurface irrigation

Suitable conditions for subsurface irrigation most often occur on glacial outwash plains, terraces, or deltas in humid or sub-humid areas.

适宜于地下灌溉的条件最常出现在冰川冲积平原、梯田或湿润、半湿润地区的三角洲地带。

The steady-state principle of constant-head well permeameter, which was used to calculate the field-saturated hydraulic conductivity, was applied to quantify the suitable emitter discharge rate for indirect subsurface drip irrigation under different water-conducting device specification conditions in this text. Using the calculated emitter discharge rate to supply water, characteristic parameters of wetted soil volume were studied during the water movement process.

该文将恒定水头钻孔积水入渗求解土壤饱和导水率的稳态原理用于定量化求解间接地下滴灌技术中与任意导水装置尺寸相匹配的滴头流量，并以计算的技术参数为基础，研究了间接地下滴灌水分运移过程中的土壤湿润体特征参数。

Using uniform 25-point sampling method, soil water distribution of subsurface drip irrigation in cotton fields was evaluated.

采用均匀25点取样，对大田棉花地下滴灌的土壤水分分布状况进行了评价。

Subsurface irrigation is limited in its adaptation.

地下灌溉的适用性是有限制的。

Subsurface drip irrigation is one of effective irrigation methods. But it is easy to clog.

地下滴灌是一种高效的节水灌溉技术，但系统易于堵塞，堵塞问题成为影响地下滴灌成败的关键。

Subsurface irrigation, also called sub-irrigation, can be considered as a controlled drainage system.

地下灌溉可以看作是一个有控制的排水系统。

During the infiltration process of indirect subsurface drip irrigation, the ponded water depth changed from zero to a constant and accelerated the water movement in the vertical direction, which reduced the discrepancy of wetted distance in lateral direction and vertical direction, while the changed water depth had small influence on the wetting front movement in vertical direction to upward and downward. The shape of wetted soil zone was spheroid, and its symmetry axis lied near the bottom of the water conducting device.

间接地下滴灌灌水过程中，从零开始逐渐增大并趋于稳定的积水深度加速了水分在垂直方向的运移，缩小了横向湿润距离和垂向湿润距离之间的差异，但变化的积水深度对湿润锋在垂直方向向上和向下的运移速率影响不大，使湿润体形状表现为扁率不断减小的椭球体，且椭球体对称轴分布在靠近导水装置底部的位置。

From analyzing the drip irrigation emitter types and choosing in experiment, the main conclusions are as follows: The best type of subsurface drip irrigation emitter is drip pipe. Under lower water press the stabilization discharge of orifice emitter in soil is three fifth of that in air, which can meet the request of subsurface drip irrigation.

通过对现有滴灌灌水器类型的分析及试验筛选，结果表明，内镶式滴灌管最适宜应用于地下滴灌，在低压运行时，孔口式滴头在土壤中稳定出流量为空气中的 3/ 5 ，基本可以满足地下滴灌的要求；在较高供水压力时，所选取的几种滴头基本上都可以用于地下滴灌。

The water quantity of furrow irrigation was half of subsurface irrigation and drip irrigation\'s every time; tomato was cultivated in annual spring, fertilization amount was same in different plots, annual test scheme and test methods were exactly same.

长期定位灌溉试验于1998年开始，灌溉控制上限和下限分别设定为土壤水吸力6.3KPa和40KPa，其中渗灌和滴灌处理一次灌水量为沟灌一次灌水量的1/2；每年春季栽培一茬番茄，各小区施肥量一致，每年的试验方案、试验方法完全相同。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。