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水分生产力    
相关语句
  water productivity
    Simulation of Water Productivity and Soil Desiccation Effects of Artificial Grassland on Loess Plateau
    黄土高原人工草地水分生产力和土壤干燥化效应模拟研究
短句来源
    The water productivity of all the six cultivars was over 0.566 kg·m -3,increased by 59.89%~116.38%.
    种植旱稻的水分生产力达到 0 5 6 6kg·m-3 以上 ,比种植水稻提高了5 9 89%~ 116 38% .
短句来源
    It is important for theory significance and production application to study water potential productivity and soil water using characteristic on the artificial pastures quantificationally, to explore the grass productivity change and the law of soil desicctation on artificial pasture, and to evaluate the stability of water productivity on different type artificial pasture on loess plateau.
    定量研究黄土高原人工草地水分生产力和土壤水分利用特征,摸清不同类型人工牧草地的生产力变化和草地下土壤干燥化规律,评价不同类型人工牧草地水分生产力的稳定性,为制订黄土高原植被建设规划与种植人工牧草技术方案提供科学决策依据,具有重大的理论意义与生产应用价值。
短句来源
  water productivity
    Simulation of Water Productivity and Soil Desiccation Effects of Artificial Grassland on Loess Plateau
    黄土高原人工草地水分生产力和土壤干燥化效应模拟研究
短句来源
    The water productivity of all the six cultivars was over 0.566 kg·m -3,increased by 59.89%~116.38%.
    种植旱稻的水分生产力达到 0 5 6 6kg·m-3 以上 ,比种植水稻提高了5 9 89%~ 116 38% .
短句来源
    It is important for theory significance and production application to study water potential productivity and soil water using characteristic on the artificial pastures quantificationally, to explore the grass productivity change and the law of soil desicctation on artificial pasture, and to evaluate the stability of water productivity on different type artificial pasture on loess plateau.
    定量研究黄土高原人工草地水分生产力和土壤水分利用特征,摸清不同类型人工牧草地的生产力变化和草地下土壤干燥化规律,评价不同类型人工牧草地水分生产力的稳定性,为制订黄土高原植被建设规划与种植人工牧草技术方案提供科学决策依据,具有重大的理论意义与生产应用价值。
短句来源
  water productivity
    Simulation of Water Productivity and Soil Desiccation Effects of Artificial Grassland on Loess Plateau
    黄土高原人工草地水分生产力和土壤干燥化效应模拟研究
短句来源
    The water productivity of all the six cultivars was over 0.566 kg·m -3,increased by 59.89%~116.38%.
    种植旱稻的水分生产力达到 0 5 6 6kg·m-3 以上 ,比种植水稻提高了5 9 89%~ 116 38% .
短句来源
    It is important for theory significance and production application to study water potential productivity and soil water using characteristic on the artificial pastures quantificationally, to explore the grass productivity change and the law of soil desicctation on artificial pasture, and to evaluate the stability of water productivity on different type artificial pasture on loess plateau.
    定量研究黄土高原人工草地水分生产力和土壤水分利用特征,摸清不同类型人工牧草地的生产力变化和草地下土壤干燥化规律,评价不同类型人工牧草地水分生产力的稳定性,为制订黄土高原植被建设规划与种植人工牧草技术方案提供科学决策依据,具有重大的理论意义与生产应用价值。
短句来源
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  water productivity
The distribution of these assemblages is controlled by environmental factors that are determined by bathymetric and latitudinal zonality, currents, upwellings, continental runoff, and water productivity.
      
Relationship between heavy metal pollution and water productivity in Xiamen estuarine harbor
      
Use of simulation models to evaluate irrigation performance including water productivity, risk and system analyses
      
From the water productivity point of view, however, the water productivity of grapes appeared to be maximal without any irrigation; while for the cotton, irrigation at 600?mm maximizes water productivity.
      
Water productivity (WP) in the GCIS oscillated between 0.72?€/m3 and 1.99?€/m3 during the 4?years and averaged 1.42?€/m3 of water supplied for irrigation, while the irrigation water productivity (IWP) averaged 0.63?€/m3 for the period studied.
      
更多          
  water productivity
The distribution of these assemblages is controlled by environmental factors that are determined by bathymetric and latitudinal zonality, currents, upwellings, continental runoff, and water productivity.
      
Relationship between heavy metal pollution and water productivity in Xiamen estuarine harbor
      
Use of simulation models to evaluate irrigation performance including water productivity, risk and system analyses
      
From the water productivity point of view, however, the water productivity of grapes appeared to be maximal without any irrigation; while for the cotton, irrigation at 600?mm maximizes water productivity.
      
Water productivity (WP) in the GCIS oscillated between 0.72?€/m3 and 1.99?€/m3 during the 4?years and averaged 1.42?€/m3 of water supplied for irrigation, while the irrigation water productivity (IWP) averaged 0.63?€/m3 for the period studied.
      
更多          
  water productivity
The distribution of these assemblages is controlled by environmental factors that are determined by bathymetric and latitudinal zonality, currents, upwellings, continental runoff, and water productivity.
      
Relationship between heavy metal pollution and water productivity in Xiamen estuarine harbor
      
Use of simulation models to evaluate irrigation performance including water productivity, risk and system analyses
      
From the water productivity point of view, however, the water productivity of grapes appeared to be maximal without any irrigation; while for the cotton, irrigation at 600?mm maximizes water productivity.
      
Water productivity (WP) in the GCIS oscillated between 0.72?€/m3 and 1.99?€/m3 during the 4?years and averaged 1.42?€/m3 of water supplied for irrigation, while the irrigation water productivity (IWP) averaged 0.63?€/m3 for the period studied.
      
更多          
  crop water productivity
The results of this study suggest that inducing stress is not a good strategy for increasing crop water productivity (yield per unit ETd) for corn and point out the need to minimize irrigation water losses and improve irrigation scheduling.
      
Modeling the role of irrigation in winter wheat yield, crop water productivity, and production in China
      
The impact of irrigation on crop yield (Y), crop water productivity (CWP), and production has not been quantified systematically across regions covering the whole country.
      
Long-term trends in intersectoral water allocation and crop water productivity in Zhanghe and Kaifeng, China
      
A systems approach to the analysis of crop water productivity.
      
更多          


Based on pot experiment ,Proso yield response to different droughts in five growing periods was analysed,thewater deficits index( ri )and the drop productivity index(Ri)and the preductivity response index(Kyi)were ob-tained. The results show that:grain-filling stage was the most sensitive stage response to drought.When drought oc-cured in the stage,the daily drop product was the highest and the water use efficiency was the lowest. It is also inthis stage that irrigation is the most effective. In shooting and...

Based on pot experiment ,Proso yield response to different droughts in five growing periods was analysed,thewater deficits index( ri )and the drop productivity index(Ri)and the preductivity response index(Kyi)were ob-tained. The results show that:grain-filling stage was the most sensitive stage response to drought.When drought oc-cured in the stage,the daily drop product was the highest and the water use efficiency was the lowest. It is also inthis stage that irrigation is the most effective. In shooting and anthesis stage,the reaction between yield and droughtis very little,The evaptranspiration(ET)in tilling stage is the highest,about 28.6%of total ET. The normal evap-transpration in pot experiment was up to 185mm and in droughts was 167mm,and mean WUE was 0.5Kg/mm inthe experiment of drought treatment.ri,Ri,Kyi were used to foretell the proso yield.The estimated result was veryclose to the real yield, also the biomass response to drought was anslysed in the paper.

该文利用盆栽试验结果,通过分析糜子在不同生育阶段受不同强度干旱的产量反应,得出:糜子各生育期的受旱缺水指数r_i,减产指数Ri,及产量反应系数Kyi。认为糜子在灌浆期对干旱敏感性最强,此阶段受旱,日减产率最大,水分生产力最低,灌水效果最佳。拔节+扬花期产量和干旱之间的反应最弱。糜子生育期耗水以分蘖期最多,占总量的28.6%,正常供水盆栽全生育期耗水185mm,不同干旱强度下为167mm。水分生产力平均约0.5kg/mm。并用ri、Ri、Kyi对生产中的估产模式、及产量进行了检验,结果良好。同时还对生物产量反应进行了分析。

An experiment for analysing water transformation and productive forces in paddy fields has been carried out simulating water management patterns fields with different water sources.The results show that①there are obvious differences in water transformation in paddy fields with different treatments and water distribution in the paddy fields with normal management shows that transpiration accounts for 1/2,land ploughing and preparetion 1/6, plant constitution 1/21,field seepage 1/14 and other environmental...

An experiment for analysing water transformation and productive forces in paddy fields has been carried out simulating water management patterns fields with different water sources.The results show that①there are obvious differences in water transformation in paddy fields with different treatments and water distribution in the paddy fields with normal management shows that transpiration accounts for 1/2,land ploughing and preparetion 1/6, plant constitution 1/21,field seepage 1/14 and other environmental consumption(maintenance)1/5;②transpiration from water layer irrigation in paddy fields and environmental water consumption for maintenance all the year round is a little too hogh and the proportion of ploughing irrigation and rain maintaining management and land ploughing and preparation to field seepage is too large;③for water productive forces and rice yield,the water layer irrigation all the year round agrees wath normal water management,being 6.65kg/mm.hm 2.a and the ploughing irriagtion and rain maintaining treatment is lower,being 6.13kg/mm.hm 2.a;④for colony photosynthetic accumulating effect,differences among treatments and yield difference are the same,less for early rice and obvious for late rice and;⑤water layer irrigation treatment gives the highest water productive efficiency of leaves for early rice,normal management gives the highest for late rice,while ploughing irrigation and rain maintaing treatment gives less for both early rice and late rice and the relations are changeable at different growing periods.The effect of water condifions in fields on photosynthesis,transpiration,temperature at crown layer and leaf area of rice in varying degrees.

模拟不同水源条件的稻田水管理模式 ,试验解析田间水量转换及其水分生产力。结果表明 :处理间田间水量转换有明显差异 ,常规管理田间水分分配为 :蒸散占 1/2 ,翻耕整地占 1/6 ,植物构成占 1/2 1,田间渗漏占 1/14 ,其他环境耗水 (维持 )占 1/5。长年水层灌溉田间蒸散和维持性环境耗水偏大 ;耕灌雨养管理翻耕整地和田间渗漏比例过高。水分生产力 ,长年水层灌溉与常规管水的稻谷产量的表现一致 ,为 6 .6 5 kg/mm· hm2 · a,耕灌雨养处理较低 ,为 6 .13kg/mm· hm2 · a。群体光合累积效应处理间差异表现与产量差异表现相同 ,早稻差异很小 ,晚稻差异显著。叶片水分生产效率 ,早稻以水层灌溉最高 ,晚稻是常规管理最高 ,耕灌雨养处理早晚稻都较低。不同生育期这种大小关系有变化。田间水分条件对水稻光合、蒸腾、冠层温度和叶面积有不同程度的影响。

Developing water-saving rice cultivation is one important strategy for food security in China.This paper reported the experimental results of introducing six upland rice cultivars to eastern Keerqin sandy land.The filed experiment results showed that under the condition of 60% water-saving,the yield of cultivars XH 95-13 and XH 95-13-6 was 10.2% and 5.5% higher than the control,respectively,while other four cultivars decreased by 6.7%~18.6%.Economically,all the cultivars except JP 121 had a higher income than...

Developing water-saving rice cultivation is one important strategy for food security in China.This paper reported the experimental results of introducing six upland rice cultivars to eastern Keerqin sandy land.The filed experiment results showed that under the condition of 60% water-saving,the yield of cultivars XH 95-13 and XH 95-13-6 was 10.2% and 5.5% higher than the control,respectively,while other four cultivars decreased by 6.7%~18.6%.Economically,all the cultivars except JP 121 had a higher income than the control,and the profitability of cultivars XH 95-13 and XH 95-13-6 reached 24.0% and 19.3%,respectively.The water productivity of all the six cultivars was over 0.566 kg·m -3,increased by 59.89%~116.38%.Pot experiment showed that 12.1%~16.3% of soil moisture in 0~15 cm layer was beneficial to the growth of upland rice.In eastern Keerqin sandy land,effective tillers occurred before July 18.In brief,upland rice production could be extensively applicable in eastern Keerqin sandy land to gradually alternate the traditional lowland rice cultivation with continuous flooding,and save much underground water.

开发节水的稻作农业是确保我国粮食安全的一个非常重要的战略问题 .本文报导了科尔沁沙地东部地区 6个旱稻品种的引种试验结果 .田间引种试验表明 ,灌溉用水减少 6 0 %的情况下 ,西旱 95 13和西旱 95 13 6分别比对照增产 10 2 %和 5 5 % ;其它 4个旱稻品种产量减少 6 7%~ 18 6 % .从经济效益考虑 ,除吉品 12 1外 ,其它 5个旱稻品种的经济收入比对照都有增加 ,增收最大的两个品种西旱 95 13和西旱 95 13 6达到 2 4 0 %和 19 3% .种植旱稻的水分生产力达到 0 5 6 6kg·m-3 以上 ,比种植水稻提高了5 9 89%~ 116 38% .盆栽试验表明 ,含水量 12 1%~ 16 3%土壤环境有利于旱稻生长 ,7月 18日以前分蘖为有效分蘖 .可以认为 ,在科尔沁沙地东部推广旱稻种植具有广阔的前景 ,可以逐步替代传统的水稻栽植模式 ,节省大量地下水资源 .

 
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