灌溉面积

Taking the overall crop yields or overall net profits on the whole planned area to be maximum as the targets respectively, the paper gives calculating formulae of rational irrigation quota in accordance with that the constant term of Y=f is smaller or greater than zero and the water use coefficient of irriga...

分别以整个灌区上的总净收益和总产量最大为目标，在假定仅种植单一作物，且地力及其它因素一致的条件下，给出了与Y＝Y中的常数项a大于或小于零以及灌溉水利用系数随灌溉面积变化与否相对应的作物合理灌溉定额的计算式。

The result shows that: The variation rhythm of the sensitivity index changed unanimously for Jensen,Blank and Stewart water production functions of spring wheat in Liangzhou city,the volume is small in the former stage,then become large at the middle stage,and less at the last stage. Jensen and Stewart water production functions are better of spring wheat in Gulang County in 1987-1989. The Variation rhythm of water deficiency sensitive index is unanimous: the volume are small at first,then large at middle,and diminish at last. The Variation rhythm of water deficiency sensitive index is unanimous in Jensen,Blank and Minhas of flax in Liangzhou county in 1987-1989. The water deficiency sensitive index in Gulang district in 1987-1989 models bad,are too many minus. 3 Establishing the non-linear model to definitive the irrigation quota and dimension of single crop,according the three prototype Precipitation,allocating the limited water optimally according to full water supply,95 percent,75 percent and 50 percent. Economy benefit is the biggest aim function,so getting three groups for irrigation quota,irrigation dimension and benefit,the biggest benefit is the most optimal result.

结果表明：1985-1986 年凉州春小麦Jensen 模型、Bl(来源：10a1ABC论文网www.abclunwen.com)ank 模型和Stewart 模型的敏感指数变化规律接近一致，在前期较小，中期增大，最后再减小。1987-1989 年古浪春小麦水分生产函数以Jensen 模型和Stewart 模型拟合较好，其敏感指数变化规律比较一致，敏感指标值前期较小，中期增大，后期又减小。1983-1985 年凉州亚麻水分生产函数以Jensen 模型、Blank 模型和Minhas 模型敏感指标值变化规律比较一致：先减小，后增大，最后再减小。1987-1989 古浪亚麻敏感指数出现负值较多，模型拟合较差。3 建立单作物种植条件下灌溉定额与灌溉面积的确定的非线性规划模型，将有限的水量按照充分供水，95%、75%和50%供水来分配水资源，以经济效益最大为目标函数，得出三组灌区灌溉面积和效益结果，其中以效益最大为最优解。

Using the infrared images of China′s statellite and infrared airphotos,we have investigated the irrigation arear,analysed and evaluated the irrigation environment and conditions in Zhong Ning Country,Ning Xia.

本文利用我国国土普查卫星的假彩色红外遥感图象，结合假彩色红外航片，在宁夏河套卫—宁灌区的中宁县进行了灌溉面积调查、灌溉环境及水利条件分析评价试验研究。

Potted plants of Impatiens balsamina were selected for irrigation treatments with municipal domestic sewage effluents.

我国自1957年污水回用于灌溉在全国试验推广以来，污水灌溉面积已达8.806×105hm2[1]，主要用于农业灌溉等。

The coaxal coherent chart of irrigation water puts allfactors into one chart:channel transport capacity, field water consumption strength ,benefit area and irrigation time.

灌溉用水合轴相关图把渠道供水能力，田间耗水强度，效益面积、灌水时间等因素融于一体，按照一定的关系以曲线或直线组绘成合轴相关图，通过该图即可初步设计渠道流量，选定灌溉面积，也可确定轮灌周期、轮灌面积等。

Given its "irrigation farming in oases,"Xinjiang has built a number of large modern water conservancy projects, such as the Kizil Reservoir in Aksu and the Ulug Ata Reservoir in Hotan, in addition to canals, ditches and seepage control projects, which have greatly increased the amount of water diverted, reservoir storage capacity and effectively irrigated areas.

新疆根据&绿洲生态、灌溉农业&的特点，建成了以阿克苏克孜尔水库、和田乌鲁瓦提水利枢纽等为代表的一批现代大型水利工程和大批干支渠及其防渗工程，全区的引水量、水库库容和有效灌溉面积迅速增加。

Grain yield per hectare is the most important factor in the method of the gray system analysis. There was significant correlation between effective irrigated area, the amount of fertilizer applied, mechanical power and the grain yield. The area of grain and the population of agriculture are factors that affect grain production. The correlation coefficient of natural resources and grain production changes unstably.

单产与粮食产量始终保持很高的关联度；有效灌溉面积、实际机耕面积、化肥施用量、农村用电量和农机总动力等农业投入对粮食产量提高影响重大；耕地面积和劳动力对粮食产量具有一定的制约；自然条件与粮食产量的关联度剧烈变动。

The practices of efficient use of water were studied and popularized at the same period.

在扩大灌溉面积的同时，研究和推广了以节水为中心的灌溉新技术。

This article has selected from 1995 - 2007 13 year data, since has been our country stable agricultural policy data, reliable, obtains the grain yield and the farm investments, the crops sown area, the farm price, the primary industry working population, the countryside electricity consumption, the agricultural chemical fertilizer employment quantity, the disaster area, the yield per unit of area, the effective irrigated area finally through the empirical analysis, based on this and gives the comment and the measure.

本文选取了从1995年—2007年13年的数据，都是我国稳定农业政策以来的数据，可靠性强，最后通过实证分析得出粮食产量与农业投资、农作物播种面积、农产品价格、第一产业从业人口、农村用电量、农业化肥施用量、成灾面积、单位面积产量、有效灌溉面积，并在此基础上提出意见和措施。

This project mainly Yuzui watershed embankment, Feisha spillway weir, three-bottle most of the intake and Baizhang embankment, were the words ancillary works on a dike, scientific solution to automatically divert the river (Yuzui watershed embankment 40 6 watershed), the automatic flushing (Yuzui watershed sand embankment on February 8 points), control water flow and other issues, eliminate the flooding, the West Sichuan Plain to become a "people from the flood and drought""Land of Abundance."

这项工程主要有鱼嘴分水堤、飞沙堰溢洪道、宝瓶口进水口三大部分和百丈堤、人字堤等附属工程构成，科学地解决了江水自动分流、自动排沙、控制进水流量等问题，消除了水患，使川西平原成为&水旱从人&的&天府之国&。1998年灌溉面积达到到66.87万公顷，灌溉面积已达40余县。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了