查询词典 irrigation

Impacts on flow of water and transport of solute of factors such as soil texture and structure, discharge rate of emitters, depth of laterals and time lasted in a single irrigation are simulated.

利用建立的地埋点源土壤水运动和溶质运移数学模型描述地下滴灌条件下土壤水、肥运动的分布规律，将土壤质地结构、滴头出流量、滴头埋深和单次灌水历时等因素对土壤水分布的影响进行模拟分析。

A new designing method for sprinkle-irrigation laterals, in which the spacing of sprinklers can be changed with the outflow of sprinklers along the lateral, is developed.

在传统的喷灌支管设计中，支管上各喷头等间距布置，但是沿支管灌水量不相等。为此提出一种实现沿支管灌水量相等，但允许喷头间距变化的支管设计方法。

Lateral 4 rows and 2 laterals 4 rows increase the amount of nitrogen application and reduce the volume of water will help improve cotton WUE, 2 laterals 6 rows volume control nitrogen and reduction water improve irrigation WUE.

棉花产量效应表明，1带4行和2带4行增加施氮量和灌水量有利于提高产量，2带6行则增加灌水量和控制施肥量有利于提高产量。

By lucubrating balance of the overall volume of water resources in Shuangta Irrigation area of Hexi aisle,it supplies a sufficient basis for establishing scientific management mechanism and reasonable exploitation and utilization of water resources.

通过河西走廊双塔灌区水资源总量均衡的深入研究，提出了为建立科学的管理机制和合理开发利用水资源的建议。

In recent years, due to the discharge of industrial wastes, irrigation with pol- luted water and the use of fertilizer and pesticide, more and more Cd entered and accumulated gradually in the black soil (Guo and Zhou, 2004), which has imposed potential effect on the environment of black soil.

在近年来，由于排放工业废料，灌溉的Pol - luted水和使用肥料和杀虫剂，更裁谈会和更多的进入和积累，逐步在黑土（郭和周， 2004年），已施加的潜在影响，对环境的黑土。

Due to food pressure, grain product in the western Jilin Province will be enhanced in the near future. Farmland areas in the area will be decreased slowly in the near future, but with the technique development of irrigation establishment, paddy areas and utilization amount of fertilizer and pesticides will be increased rapidly. So, the NPS pollution from farmland will be more serious. The main lakes in the areas such as Moon Lake and Qagan Lake have been polluted by N and P, and the content of salt in the Nenjiang River has been increasing since last 30 years. All of these show that the negative effects of NPS pollution in the area have been serious and should not be neglected by the scientific research and corresponding government management. To deal with the contradiction of agriculture development and water pollution, the trend of increasing paddy area and using amount of fertilizer, pesticide and herbcide in the western Jilin Province should be controlled. Also, the drainage of return flow from paddy should be controlled and return flow should be disposed with ecotechniques by use of the large areas of lakes and mires in the area. Through these measures, the quality of surface water could be protected and the degeneration of ecoenvironment in the area could be contained.

我国由于粮食压力，未来吉林西部的粮食生产还将进一步加强，随着种植业结构的调整，垦殖率会略有下降，但随灌溉设施的建设与完善，水田面积将进一步扩大，化肥、农药的用量还将快速增加，农业活动引起的非点源污染将更加突出，而研究区的主要湖泊月亮湖、查干湖目前已达中等富营氧化水平，嫩江水质的咸化趋势明显，因此农田非点源污染物的流失及其内流区外流化面积的增加对地表水体富营养化、咸化的作用愈来愈明显，农田非点源对地表水水质的影响已不容忽视，应引起社会的关注，为协调农业发展与水污染这一矛盾，吉林西部应遏制化肥、农药施用量增长过快和水田过度开发的势头，控制洗盐回归水的排放量，利用区内广泛分布的大量泡沼对农田径流和回归水进行生态处理，既保护了地表水的水质，又有利于生态环境的改善。

The soil moister dynamics of winter wheat with irrigation at different stages were studied.

为高效利用水分资源以及给冬小麦灌水制度的合理制定提供依据，采用水量平衡法，系统研究了不同时期单次灌水和两次灌水的冬小麦土壤水分变化动态。

Winter wheat ; Irrigation ; Soil moister ; Dynamics

冬小麦；灌溉；土壤水分；变化动态

The results will be useful to cotton production under mulched drip irrigation in high salinity soil and to efficient use of water resource.

试验结论将为棉花膜下滴灌改良利用盐碱地和合理利用水资源提供理论依据。

The simulation results of the model shows that it is able to express correctly the relationship between the yield and water use of cotton and the BP neural network is a new method suitable to simulate the crop response to water under mulched drip irrigation.

本文依据人工神经网络的基本原理在充分吸收其最新理论研究成果的基础上，以膜下滴灌试验得到的实测棉花产量和各生育阶段水分资料为样本建立了基于BP神经网络的棉花作物水分响应模型。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。