查询词典 irrigation engineer

In this paper,established the functions of irrigation application efficiency,irrigationdistribution efficiency and water store efficiency according to the parameters of water flowadvance and infiltration for furrow and border irrigation with tailor water condition.

本文提出根据膜孔沟灌的水量平衡原理，由水流行进方程和有关参数，确定入渗方程，并根据灌水均匀度、灌溉效率和储水效率的定义，推导出长沟畦灌溉有排水条件下由行进方程和入渗方程的参数确定的灌水均匀度方程，与沟畦长分段求解方法相比，其误差小于2%。

For example, the irrigation water should reach the end of the rows in two hours out of an eight hour irrigation period or three hours out of a twelve-hour period.

总灌水时间为8小时，灌溉水流应在2小时内到达尾沟；总灌溉时间为12小时，灌溉水流应在3小时内流到尾沟。

Under conventional N fertilization and irrigation condition, N2O emissions during 2001-2002 and 2002-2003 in winter wheat and summer maize rotation system were 1959 g N hm-2 and 1250 g N hm'2, respectively; and 68%-86% of N2O emission occurred in summer maize growth season, the emissions mainly occurred in 2 weeks after N fertilization and irrigation. The highest flux rates were 5.06 mg m-2 d-1 and 5.60 mg m-2 d-1 in the rotation period of 2001-2002 and 2002-2003, which were happened at the ten-extended leaf stage in summer maize season when top-dressing N fertilizer was applied.

在冬小麦／夏玉米轮作体系农民传统的水肥管理处理中，2001-2002和2002-2003两个轮作周期内测得的N_2O的排放量分别为1959 gN hm~(-2)和1250 gN hm~(-2)，N_2O的排放主要集中在每次施肥和灌水之后的两周内，其中夏玉米十展叶期追肥后两周内N_2O的排放速率最高，2002年和2003年分别达到5.06 mg m~(-2)d~(-1)和5.60 mg m~(-2)d~(-1)。

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。

Compared with conventional irrigation, APRI treatment during different growth stages of tobacco saved irrigation water by 10.6% under lower fertilization and 7.1% under higher fertilization, respectively.

与常规灌溉相比，不同生育期APRI处理低肥时平均节水10.6%，高肥时平均节水6.1%，低肥时烟叶WUE平均提高2.3%。

The results showed that partial root-zone drying and alternate partial root-zone irrigation treatments reduced tobacco water consumption and tobacco yield, but tobacco water use efficiency increased with 7.5% and 11.2%, N and K contents of middle leaves treated with N 0.20 g/kg soil enhanced 23.1% and 25.2%, 33.6% and 59.8%, respectively when compared to the conventional irrigation treatment.

结果表明，在不同施N水平下，与常规灌溉相比，部分根干燥灌溉和分根区交替灌溉的烤烟耗水量下降，产量有所减少，而水分利用效率提高7.5%和11.2%；施用N 0.20 g/kg土时，PRD和APRI中部叶N含量分别提高23.1%和25.2%，K含量分别提高33.6%和59.8%。

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.

在天津市静海县重壤质浅位厚层夹粘土上，布置了连续多年灌溉浅层地下微咸水(矿化度4.7 g·L-1)的模拟试验，对土壤渗透特性、土壤团粒结构等物理性状以及全盐、分盐等化学性状的影响进行了研究。

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 overriding lesson from history is that most irrigation-based civilizations fail," writes Sandra Postel in her compelling survey of the global water crisis, Pillar of Sand: Can the Irrigation Miracle Last?"

桑德拉波斯特尔在其有名的全球水危机调查报告《沙之柱：灌溉奇迹还能维持吗？》中说：&最重要的历史教训是，大多数以灌溉为基础的文明已经衰落。&

It was carried out to optimize combination scheme experiment of three factors among level-border specifications, irrigation quota and fertilizer methods under the condition of level-border + plastic film irrigation for corn in the sand of soil by cross experiment methods.

为了研究玉米水平畦灌与膜上灌复合节水节肥的效果，采用正交试验法，在沙性土壤上，对复合灌水条件下的水平畦田规格、灌水定额和施肥方式3因素的最优组合方案进行了试验研究。

The two-acre Dunbar Community Garden in Little Rock has served as a model for several years.

几年来，坐落于小石城，占地两英亩的邓巴社区菜园树立了一个标杆。

Jerry points to the jacket hanging in the bathroom. It's ruined, and unwearable What?

杰瑞指着洗手间里挂着的夹克，毁了，不能穿了）什么？