The yield increased as the ecapotranspiration,while it comes to a certain,the yield won't increase,it may decline. 2According to the non-full irrigation experimental datum of spring wheat and flax in Liangzhou and Gulang city of Shiyang River Basin,calculating the crop water deficiency sensitive index or coefficient by using crop water production function models of Jensen,Blank,Stewart and Minhas.

產(chǎn)量隨著耗水量的增加而增加午夜视频在线观看91，當(dāng)達到一定數(shù)值將不再增加三级绝黄A片在免费线观看欧美，反而有下降的趨勢黄片视频A级毛片在线观看。2 依據(jù)石羊河流域涼州和古浪春小麥和亞麻非充分灌溉試驗資料日韩亚洲人成在线综合日本，利用現(xiàn)有的Jensen 美女裸体乱插视频欧美、Blank、Stewart 和Minhas 水分生產(chǎn)函數(shù)模型求解作物的缺水敏感指數(shù)色本土激情自拍。

2According to the non-full irrigation experimental datum of spring wheat and flax in Liangzhou and Gulang city of Shiyang River Basin,calculating the crop water deficiency sensitive index or coefficient by using crop water production function models of Jensen,Blank,Stewart and Minhas.

依據(jù)石羊河流域涼州和古浪春小麥和亞麻非充分灌溉試驗資料欧美日韩国产VA在线，利用現(xiàn)有的Jensen 、Blank大陆精品偷拍二区、Stewart 和Minhas 水分生產(chǎn)函數(shù)模型求解作物的缺水敏感指數(shù)免费A一级毛片在线播放。

Both exponential and Erlang distribution models for irrigation events are developed.

研究了指數(shù)分配和非指數(shù)分配模型及10個連續(xù)的灌溉周期。

Thearticle gives the method of confirming the insufficient irrigational rule of three mainkinds farm crop which are wheat, corn, cotton of big farmlands, furthermore comparingthe effect of saving water to increase production under different rule of insufficientirrigation.

文章給出了小麥99国产色视频大全、玉米www狼友、棉花等三種主要大田作物的非充分灌溉制度的制定方法，并對不同的非充分灌溉制度的節(jié)水增產(chǎn)效果進行了比較av不卡综合网站在线。

The reference crop evapotranspiration(ET0) in Guanzhong region was calculated with the Penman-Monteith equation. The change characteristics of meteorological factors and ET0 over year were analyzed. The regressing relation between ET0 and geography factors was established. Space distribution of ET0 based digital elevation model was obtained. The water consumption model of main cropes was established using the crop cofficient method. The irrigation water requirement of main crop and it's space distribution based DEM under the different precipitation probability was obtained, which advanced the calculation precision of ET0 from spot scal to regional scal. The concept of water consumption under the irrigational scal was proposed. The water consumption model of different water user and model of groundwater balance based on the water consumption of Baojixia irrigation district was established. Which can refects the relation between water utilization, water consumption and change amount of groundwater resouces.

深入分析了關(guān)中地區(qū)氣象要素的變化趨勢亚洲国产一区二区三区网站，用Penman-Montainth 公式計算了參考作物蒸發(fā)蒸騰量（ET0），建立了ET0與地理要素的多元回歸關(guān)系99riav10，獲得了基于數(shù)字高程模型DEM的關(guān)中地區(qū)ET0的空間分布圖91免费网址在线手机；用作物系數(shù)法建立了關(guān)中主要作物生育期耗水模型，獲得了主要作物在不同降雨條件下的灌溉需水狂艹美女，以及基于DEM的主要作物灌溉需水空間分布圖久久av在，提高了作物蒸發(fā)蒸騰量由點到面尺度轉(zhuǎn)換過程中的估算精度午夜在线观看国产剧情视频；界定了灌區(qū)尺度的耗水量的概念华人AV网站，包括用水耗水和非用水耗水，建立了灌區(qū)耗水量計算模型及基于耗水量變化的淺層地下水均衡模型日妓黄视频，能較好地反映灌區(qū)引水量永久福利综合国产第一页、耗水量及地下水蓄變量之間的內(nèi)在關(guān)系。

Part II: In accordance with the meaning of Zhuang toponomys, summed up several factors strong associated with the spatial distribution of the Zhuang toponomy,including the altitude, distance to the central cities, and distance to traffic line, whether in the land of paddy soil or irrigation area, the slope and aspect.

第二部分：根據(jù)壯語地名的涵義亚洲精品中文字幕重口另类，總結(jié)出了海拔高度人人看人人射，與中心城市距離，與交通線距離日本系列JULIA在线播放，是否靠近或在灌溉用地或水稻土范圍內(nèi)黄色轻点疼视频网站、山體坡度、坡向幾個與壯語地名的空間分布存在相關(guān)性的因子，經(jīng)過統(tǒng)計分析發(fā)現(xiàn)壯語地名和非壯語地名相比較而言在空間分布上具有這樣的特點：聚居地海拔高欧美一级大片肏屄，與中心城市距離遠制服自拍国内日韩视频，擁有灌溉耕地的機會多，距離鐵路近老熟妇一级毛片免费高清。

Due to food pressure, grain product in the western Jilin Province will be enhanced in the near future. Farmland areas in the area will be decreased slowly in the near future, but with the technique development of irrigation establishment, paddy areas and utilization amount of fertilizer and pesticides will be increased rapidly. So, the NPS pollution from farmland will be more serious. The main lakes in the areas such as Moon Lake and Qagan Lake have been polluted by N and P, and the content of salt in the Nenjiang River has been increasing since last 30 years. All of these show that the negative effects of NPS pollution in the area have been serious and should not be neglected by the scientific research and corresponding government management. To deal with the contradiction of agriculture development and water pollution, the trend of increasing paddy area and using amount of fertilizer, pesticide and herbcide in the western Jilin Province should be controlled. Also, the drainage of return flow from paddy should be controlled and return flow should be disposed with ecotechniques by use of the large areas of lakes and mires in the area. Through these measures, the quality of surface water could be protected and the degeneration of ecoenvironment in the area could be contained.

我國由于糧食壓力超碰在线一，未來吉林西部的糧食生產(chǎn)還將進一步加強，隨著種植業(yè)結(jié)構(gòu)的調(diào)整欧美网站专区，墾殖率會略有下降jizzjizz35，但隨灌溉設(shè)施的建設(shè)與完善，水田面積將進一步擴大性感美女黄污被操黄污网站在线观看，化肥变态调教一区二区三区女同、農(nóng)藥的用量還將快速增加，農(nóng)業(yè)活動引起的非點源污染將更加突出黄色影院欧美日韩，而研究區(qū)的主要湖泊月亮湖亚洲三级片中文字幕、查干湖目前已達中等富營氧化水平，嫩江水質(zhì)的咸化趨勢明顯91日韩手机在线视频，因此農(nóng)田非點源污染物的流失及其內(nèi)流區(qū)外流化面積的增加對地表水體富營養(yǎng)化播播私人影院、咸化的作用愈來愈明顯，農(nóng)田非點源對地表水水質(zhì)的影響已不容忽視日本特黄A级高清免费大片，應(yīng)引起社會的關(guān)注亚洲日本一区二区三区在线，為協(xié)調(diào)農(nóng)業(yè)發(fā)展與水污染這一矛盾，吉林西部應(yīng)遏制化肥看看AA黄色视频、農(nóng)藥施用量增長過快和水田過度開發(fā)的勢頭欧美三四级日韩三四级，控制洗鹽回歸水的排放量，利用區(qū)內(nèi)廣泛分布的大量泡沼對農(nóng)田徑流和回歸水進行生態(tài)處理广州深圳一级毛片，既保護了地表水的水質(zhì)免费国产乱伦视频，又有利于生態(tài)環(huán)境的改善。

Compared with the soil water content,it will be much more scientific to use the soil water potential as the lowest limit index of crop non-sufficient irrigation and be easier to be applied and extended.

農(nóng)田非充分灌溉中色哟哟精彩视频一区国产在线，習(xí)慣將土壤含水率作為控制灌溉的指標(biāo)毛片-A片免费强奸，但實質(zhì)上，用土壤含水率作為控制指標(biāo)是有缺陷的操草网站。

The principle new development of modern irrigation engineering.

灌溉原理與技術(shù)》是農(nóng)業(yè)水土工程學(xué)科中一門理論與技術(shù)兼?zhèn)涞膶I(yè)課程欧美另类人妻制服丝袜，主要講授現(xiàn)代科學(xué)灌溉理論的生理學(xué)和物理學(xué)基礎(chǔ)，作物需水量計算理論與方法大码老熟女Av毛片免费，非充分灌溉的科學(xué)依據(jù)與研究進展亚洲欧洲日产国产动漫，現(xiàn)代灌溉方法的原理與研究進展，旨在使學(xué)生掌握現(xiàn)代灌溉學(xué)科的基本理論丰满少妇强力进入毛片，了解本學(xué)科的關(guān)鍵技術(shù)青久久久国产av、發(fā)展趨勢與存在的問題草草草干干干，掌握相應(yīng)的工程技術(shù)，培養(yǎng)學(xué)生建立現(xiàn)代灌溉的新觀念和新理念亚洲色图2，在理論和實踐上奠定學(xué)生深入研究灌溉學(xué)科中的有關(guān)理論和技術(shù)的創(chuàng)新能力基礎(chǔ)国产乱子伦免费视。

Layout forms of irrigation canal system can be generally classified as three categories: series-wound canal system, equivalent shunt-wound canal system and nonequivalent shunt-wound canal system.

文摘：灌溉渠系的布置形式一般可分為串聯(lián)渠系、等效并聯(lián)渠系和非等效并聯(lián)渠系日本高清aⅴ永久免费，對這3種灌溉渠系水利用系數(shù)進行了理論研究人人骚人人操人人看。

non-irritating：無刺激性的

non-irrigationcanalsystem 非灌溉渠道系統(tǒng) | non-irritating 無刺激性的 | non-isentropic 不等熵的