灌溉的

The water delivery scheduling problems of multilevel optimal irrigation canal system can be solved, which meet the requirement of irrigation management.

2针对多级灌溉渠系配水的问题，基于大系统分解协调的思想，建立了一种解决多级灌溉渠系配水优化编组问题的模型。

The forecast of irrigation water volume playa an important role in the irrigation management.

灌溉用水量的预测对灌区的灌溉管理起着重要的作用。

It is favorable on the increase of leaf chlorophyll content,accumulation of day matter and WUE of cucumber under the proper irrigation frequency under drip irrigation manner and irrigation frequency six day.

适宜的灌溉频率也即是在滴灌条件下灌溉频率为6天对于增加叶片的叶绿素含量、干物质积累和水分利用率是有利的。

The experiment comprised of twelve non-pressure subirrigation treatments and one furrow irrigation as the control.

为了制定合理的番茄无压地下灌溉制度，指导大田生产实践，利用2 a温室大棚无压地下灌溉技术的番茄种植试验，研究了番茄根系分布特性和地上部分生物量的调控效应。

In order to assess the impacts of wastewater on regional groundwater system,swage water,groundwater samples were taken and analyzed in typical croplands in the North China Plain where urban wastewater or groundwater have been used for irrigation for several dec.

本文作者通过对石家庄市近郊具有几十年污水灌溉历史的典型灌区的地下水进行了采样分析，评价了华北平原区农业污水灌溉对区域地下水环境的影响。

The key of water-saving irrigation in orchard is that water should be distributed to every fruit trees evenly. Avoid waterlog and drought, make the trees absorb the water fulty, keep and natural environment in good condition.

果园节水灌溉技术的关键是使灌溉水量尽量均匀分配给每棵果树，避免过饱和极欠缺等不均现象的发生，发挥果树吸水能力，保持水土的良好状态。

Thus APRI at the root extending stage was an efficient irrigation method for tobacco production with water saving and quality regulating under lower fertilization in this study.

本研究结果表明，低肥时在烤烟伸根期进行分根区交替灌溉是烟叶生产中一种较好的节水调质的烟田灌溉方式。

In order to investigate the theoretical foundation of irrigation method for tobacco production with water saving and quality regulating, the effect of alternate partial root-zone irrigation on leaf physiological characteristics, water use and main quality indices of flue-cured tobacco during different growth stages under two fertilization levels was studied in a pot experiment.

为寻找烟田节水调质灌溉方式的理论依据，本文通过盆栽试验研究了两种施肥条件下，不同生育时期分根区交替灌溉对烤烟生理特性、水分利用以及主要品质指标的影响。

Based on the continuously irrigating model test of brackish water(4.7g·L-1)on the shallow thick-bedded clay parting heavy loamy soil with treatments of different amendments,such as zeolite,phospho-gypsm and so on,the effects of long term brackish water irrigation on the physical and chemical characters of soil and the effects of amendments on the soil of long term brackish water irrigation were all discussed.

结果表明，长期灌溉微咸水有恶化土壤化学性状、物理性状的趋势，土壤表层聚盐、氯钠离子比例提高、土壤初始入渗率逐年降低，短期灌溉还能破坏土壤水稳性团聚体，但施用沸石、磷石膏等适宜土壤改良剂能够起到缓解的效果。

The increase has been especially dramatic during the past two decades in the U.S, particularly for sprinkler and drip irrigated systems.

近20年中，美国的灌溉施肥，尤其是通过喷灌和滴灌系统的灌溉施肥，增加极其迅速。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐