灌溉

They stop the flow of rivers, block ponds in irrigation systems, interfere with fishing and spread diseases.

它们淤塞河道，阻塞灌溉系统中的水塘，妨碍养鱼作业，传播疾

Film hole irrigation is a new type of border irrigation technology and has double effects of water-saving and yield-increasing.

膜上灌是一种新型地面灌溉技术，具有节水和增产的双重效应。

Border irrigation is a new kind of surface irrigation technique derived from the irrigation practice in the irrigation district in northern China.

小畦灌是我国北方一些灌区从灌溉实践中摸索出来的一种新型地面灌水技术。

Numerical model of border or furrow irrigation flow movement is a necessary tool and approach to design and evaluate surface irrigation systems.

数值模拟畦灌水流运动过程可为地面灌溉系统设计与评价提供必要的工具和手段。

As the traditional furrow irrigation, border irrigation, such as mode of operation results in water, the waste of labor, crop quality, the reasons for higher output, agricultural efficiency closely the needs of modern drip irrigation, sprinkler irrigation, such as advanced water-saving irrigation techniques.

由于传统的沟灌、畦灌等模式造成水、劳力的浪费，作物品质、产量不高等原因，现代效益农业密切需要滴灌、喷灌等先进的节水灌溉技术。

Over-application of N fertilizer is 128 kgNha-1 for corn in bottom land where the irrigation could be done in north Shaaxi, 21 kgNha-1 for rice in south Shaanxi, 55 kgNha-1 for wheat and corn in Guanzhong.

结果表明，粮食作物生产中氮肥用量和变幅都很大，一季作物氮施用量范围为106-636 kgha-1；与试验结果和推荐量比较，过量施氮在陕北川道地灌溉玉米为128 kgha-1，陕南水稻21 kgha-1、关中小麦55 kgha-1、玉米56 kgha-1。

The strategies for restoring and rebuilding vegetation in study area were put forward that selecting local plant,harvesting rainwater to create spot distributed arbor and bush forest in following the ecosystem regulation that vegetation match with the local weather.

提出在遵从植被与气候耦合的生物地带性生态规律的基础上，以乡土植物，配合雨水集流等补充灌溉，创造斑块状乔灌木植被，是实现该地区的植被恢复、重建和稳定的重要途径。

The canal system was built in BC 250 years, have elapsed since the 2230 years of history, is the world's one of the oldest irrigation projects.

该渠系建于公元前250年，距今已有2230多年历史，是世界上最古老的水利灌溉工程之一。

The utilization coefficient of irrigation water contains the utilization coefficient of canal system water and field water.

灌溉水利用系数包括渠系水利用系数和田间水利用系数。

This research give a total guideline to celery production process, including seed and soil selection, sowing method, germination conditions, transplanting time, irrigation, fertilization, disease and pests control, harvesting and storage.

这项研究给出了芹菜生产的总的指导，包括种子和土壤的选择，播种方法，发芽条件，移栽时间，灌溉，施肥，病虫害及其防治，收割，贮存等。

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。