1.The validity of this model and the model of predicting random uncertainty are verified by field test data for the measurement of an irrigation canal in Imperial Irrigation District in California,USA.
利用在美国加利福尼亚州Imperial Irrigation District灌渠试验得到的数据验证了最大相对误差和随机不确定度预测模型的有效性。
2.Corn Growth as Affected by Plastic Cover Under Drip Irrigation Condition in the Desert
Corn Growth as Affected by Plastic Cover Under Drip Irrigation Condition in the Desert
3.The irrigation system and pure irrigation amount,based on the evaporation in the whole growing year,conform to 10687.5 m3/hm2 for 7 times. The irrigation amounts,different from plants,are 1687.5 m3/hm2 in each time except special irrigation to pear with 562.5 m3/hm2.
在全年生长期蒸散量的基础上,香梨幼园整合了的灌溉制度应是全年的净灌溉量10687.5 m3/hm2,灌溉7次,除5月20日对香梨专门灌水562.5 m3/hm2外,其余皆1687.5 m3/hm2。
4.An experiment has been conducted for investigating the rule of water consumption with three species of turfgrasses: kentucky bluegrass (Poa pratensis), perennial ryegrass (Lolium perenne), and tall fescue (Festuca arundinacea); two kinds of irrigation water resources: tap water and sewage effluent; and two kinds of irrigation methods: subsurface dripping irrigation and subsurface leaky pipe irrigation.
本研究以三种典型的冷季型草坪草草地早熟禾、多年生黑麦草、高羊茅为供试草种，以自来水和经过砂过滤和沉淀处理的城市居民社区的生活污水为灌溉水源，采用地下滴灌和渗灌两种灌水方法，通过田间对比试验，探讨了污水灌溉条件下草坪草的耗水规律。
5.Hydraulic structures,velometers,weirs,and flumes are used to gauge water in many irrigation districts.The fundamental principles and suitable conditions of these water metering methods are introduced in this paper.The main problems in the development of water metering instruments and facilities as well as main causes of difficulty in popularization of the methods in irrigation districts are analysed.It is suggested that selection and construction of water metering facilities should be combined with canal lining in irrigation districts.It is also pointed out that for realization of automation of water metering it is necessary to develop and popularize portable and stationary water metering instruments step by step based on economic development levels in irrigation districts.
介绍利用水工建筑物、流速仪、堰、槽进行量水的基本原理及各自适用条件.从量水仪器、设施的性能、价格及灌区经济发展水平等方面，分析目前在灌区量水仪器、设施的开发研制方面存在的主要问题，以及灌区量水难以普及的主要原因.提出应结合灌区渠道防渗工程建设，合理选择和建设量水设施，并根据灌区经济发展水平，分步骤研制和推广便携式或固定式量水仪器，最终实现灌区量水自动化的灌区量水实施方案.
6.The experiments were performed in Huibei water resources science experimental station in Kaifeng, Henan province in 2004. The main treatment was irrigation regimes (W1: water-saving irrigation (Flushing irrigation at -30 kPa), W2: Rainfed with survival irrigation). The sub-treatment is N-fertilizer application rate (N1: 225 kgN/hm2; N2: 300 kgN/hm2).
主处理为水处理(W1:间歇灌(土水势低于-30kPa时灌水)、W2:雨养),副处理为氮肥处理(N1:225 kgN/hm~2、N2:300 kgN/hm~2),副副处理为密度处理(D1:行间距为30 cm、D2:行间距为24 cm)。
7.Throug the study on irrigation quota and irrigation times for licorice root planted in arid sandy land of middle Ningxia, the result shows: by increasing irrigation frequency and irrigation fixed quantity properly, it can play a positive role in the conserving and increasing water-holding capacity in arid-belt sandy area.
摘要通过对宁夏中部干旱带沙地种植甘草的不同灌水定额及次数的研究，结果表明，适当的增加灌水次数和灌水定额对于保持和增加干旱带沙壤土持水率具有积极的作用，有利于植物的生长发育。
8.The results showed: free water/binding water of the all treatments of alternate partial root-zone drip irrigation less than conventional drip irrigation, and contents of chlorophyll, soluble protein and malondialdehyde (MDA) is higher than conventional drip irrigation, the treatments with low limits of alternate partial root-zone drip irrigation of 85% and 75% field water capacity saved water by 30.33% and 34.98 % respectively, and water use efficiency increased by 40.32% and 47.11% respectively, yield only decreased by 2.71% and 4.34%.
研究表明，交替滴灌各处理叶片自由水与束缚水的比值都小于常规滴灌，叶片叶绿素、可溶性蛋白和丙二醛含量均高于常规滴灌；交替滴灌灌水下限为最大田间持水量的85%和75%的处理分别比常规滴灌节约用水30.33%和34.98%，水分利用效率则比常规滴灌增加40.32%和47.11%，而产量仅下降2.71%和4.34%。
9.The use of water-saving irrigation methods and dry land farming are encouraged. Also by 2030, the area irrigated by water-saving irrigation methods will be increased to more than 40 million ha from the present 13 million ha and the effective utilization rate of irrigation water will be increased to more than 60 percent from 40 percent. In addition, the effective utilization rate of natural precipitation will be raised to upwards of 30 percent.
大力发展节水灌溉和旱作农业，到2030年，使节水灌溉面积由目前的1300万公顷提高到4000万公顷以上，灌溉水有效利用率由40％提高到60%以上，自然降水的有效利用率提高到30%以上。
10.(four billion m~3)The irrigation water of Ningxia province mainly comes from Yellow River, while the water resource of Yellow River decreased gradually, since 2000, the water can be used in irrigation was far more lower than the quota (4 billion m~3) , in 2030, water demon in this area will increase 26.0 亿 m~3, among this, about 10.5 亿 m~3 will be used in irrigation.
黄河为宁夏主要灌溉水源,现在宁夏引黄分配份额为40亿m~3,当地水资源总量为2.8亿m~3。 并且,在宁夏引黄灌区现有水利用强度下,到2030年,需水量将较2000年增加26亿m~3,其中农业需水将增加10.5m~3。
