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block irrigation
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     Xiangjiaba and Xiluodu hydroelectric power stations are located on the lower reaches and their installed capacities are 6 and 12 million kilowatts respectively. As Jinsha River's superior constructing condition and its lower costs, comprehensive benefits from flood proof, sand block, irrigation, shipping and aquatic products can be obtained.
     位于下游段的向家坝电站和溪洛渡电站 ,装机容量分别为 6 0 0万千瓦和 12 0 0万千瓦 ,建设条件优越 ,单位造价低 ,并有防洪、拦沙、灌溉、航运、水产综合效益 ,目前开发条件已趋成熟。
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  相似匹配句对
     irrigation;
     灌水、地下水位埋深;
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     Block and Z.
     B lock和Z.
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     Gypsum block
     石膏砌块
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     Discussion on Problem of Block-up in Drip Irrigation Underground and Its Treatment
     浅谈地下滴灌的堵塞问题及处理方法
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     Research on subsurface drip irrigation block-up protection and water saving system
     亚表层渗灌防堵节水系统研究
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  block irrigation
The mean absolute error in block irrigation CU values was 2.7%.
      
The corrector coefficients that best fit the simulated and in-field measured water distribution pattern at 350?kPa for block irrigation tests were: K1=1.85 and K2=0.15.
      
The variables below have been selected for the prediction model in block irrigation, according to the AIC criterion.
      
This could probably be attributed to the effect of block irrigation itself combined with the lower accuracy when measuring climatic parameters.
      
Representation of the measured Losses against the simulated losses with the general proposed model for block irrigation tests.
      
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The studies were carried out in Chidamu Basin.The results showed that:1.Puccinella chinampolensis was the best choice to set upsown-pasture on saline-alkali soil,itgrow well in the soil of mid-heavy salt content(between 0.5%and 1.47%)and could get 4500kg/hm ̄2 in third year.2.The yields were 3.91,4.29 and 1.42~6.2 times more than thatof check after the treatments of 2 years block,block +irrigation and block+irrigation+re-sowing,respectively.3。Hippophae rhamnoides, Salix microstachys...

The studies were carried out in Chidamu Basin.The results showed that:1.Puccinella chinampolensis was the best choice to set upsown-pasture on saline-alkali soil,itgrow well in the soil of mid-heavy salt content(between 0.5%and 1.47%)and could get 4500kg/hm ̄2 in third year.2.The yields were 3.91,4.29 and 1.42~6.2 times more than thatof check after the treatments of 2 years block,block +irrigation and block+irrigation+re-sowing,respectively.3。Hippophae rhamnoides, Salix microstachys and S.welhelm siana were used to establish the live fence,and their survival percentages were 76%,96.8%,and 94%,respectively.4.The optimum,harvest periodes for herbages were determined based on theiryeild of crude protein per unit area ,which was the August,for Adragalus adsurgend eraly flower for alfalfa,heading-anthesis for Puccinellia chinampoesis ,and bud-early flower forMelilotus albus.5.During herbge growing season,the lowest salt content occured in June,and the highest occured in spring and autumn. After the establishment of pasture,the saltcontents were reduced by 45.91%,71.72%and 86.26%in first,second and third year re-spectively.

课题在柴达木盆地实施,4年的研究结果表明:①碱茅是利用盐渍地建立人工草地的首选牧草,可在中一重度含盐量(0.5%~1.47%)的土壤上生长,种植第三年产青干草4500kg/hm ̄2;②在荒漠地区采用围栏封育2年后产草量比对照提高3.91倍,封育十灌溉提高4.29倍,灌溉十补播十封育提高1.42~6.2倍;③用沙棘、小红柳、绵柳建生物围栏5km,成活率分别为76%,96.8%和94%;④以单位面积粗蛋白产量作指标确定牧草最佳收获期:沙打旺为8月下旬,首稽花期一结荚期,草木樨现蕾一初花期,碱茅抽穗一扬花期;⑤牧草生长季节内耕层土壤盐分春秋两季高,夏季低,最低期为6月。人工草地建植三年后土壤耕层盐分含量分别比对照下降45.91%,71.72%和86.26%。

Based on some features of water resources in Jiangsu Province, such as small run off amount, uneven space time distribution, large amounts of water flowing through the region, serious demand supply conflict, low utilization rate of water resources, and serious water pollution, it is pointed out that water saving irrigation may help improve the rate of utilization of soil and water resources, mitigate the demand supply conflict of water resources, increase the income of villagers, and promote the development...

Based on some features of water resources in Jiangsu Province, such as small run off amount, uneven space time distribution, large amounts of water flowing through the region, serious demand supply conflict, low utilization rate of water resources, and serious water pollution, it is pointed out that water saving irrigation may help improve the rate of utilization of soil and water resources, mitigate the demand supply conflict of water resources, increase the income of villagers, and promote the development of related industries and the sustainable development of agriculture. Main approaches are also proposed to the development of agricultural water saving in Jiangsu Province, including strengthening seepage control from channels, popularizing high efficiency water saving rice irrigation technology and mulched cultivating technology, and developing furrow irrigation, block irrigation, spray irrigation, and micro irrigation. Besides, some measures are also put forward for accelerating agricultural water saving, such as law based water management, fund collection through various channels, reformation of the management system of water resources projects, increase of investment in science and technology, and regulation of water price.

分析了江苏省水资源的特点 ,指出发展节水灌溉可以提高水资源和土地利用率 ,缓解水资源供需矛盾 ,促进农业可持续发展。提出江苏省发展农业节水的主要途径为加强渠道防渗 ,推广水稻节水高效灌溉技术 ,发展沟灌、畦灌、喷灌、微灌地膜覆盖栽培技术。提出为加快节水农业的发展 ,必须依法治水 ,广泛筹集资金 ,改革水利工程管理体制 ,加大科技投入 ,理顺水费价格。

 
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