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effect of soil water
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  土壤水文效应
     A study on the effect of soil water on vegetation rehabilitation in watershed of loess hilly area
     黄土丘陵区小流域植被建设的土壤水文效应
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  “effect of soil water”译为未确定词的双语例句
     Effect of Soil Water Stress on CO_2/H_2O Exchange Parameters in Wheat Leaves.
     水分胁迫对冬小麦叶片CO_2/H_2O交换参数的影响
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     EFFECT OF SOIL WATER REGIME AND SOIL TEXTURE ON N_2O EMISSION FROM RICE PADDY FIELD
     土壤水分状况和质地对稻田N_2O排放的影响
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     Effect of soil water on the photochemical reaction of PCP
     土壤水分在PCP光化学反应中的作用
     Taking "L402" as the test material, the effect of soil water content on tomato growth, yield and quality was studied.
     以“L402”为试验材料,研究了土壤水分对番茄生长发育及产量品质的影响。
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     Effect of soil water regime and chemical N fertilizers application on N 2O emission from
     土壤水分状况和氮肥施用及品种对稻田N_2O排放的影响
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  effect of soil water
Effect of soil water tension and harvest time on levels of infestation byPhoma foveata Foister in soil and on tubers and stems o
      
Three kinds of soils were used to study the effect of soil water and soil properties.
      
The effect of soil water content, soil temperature, soil pH-value and the root mass on soil CO2 efflux - A modified model
      
In this study, a root water extraction model was developed to incorporate the effect of soil water deficit and plant root distributions on plant transpiration of annual crops.
      
Effect of soil water content on the gravitropic behavior of nodal roots in maize
      
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Barrenness is physiological response of plants to competition among species and within a species. There is a close relationship between competition and ecological factors, such as soil fertility, water content, light and plant density. The response varies with the genotypes of varieties, the cytoplasmic-genetic male sterility and the practice of removing tassel by hand. The barrenness-resistance of a genotype also determines the optimum density under all environmental conditions. Through improve- ment of hybrids,...

Barrenness is physiological response of plants to competition among species and within a species. There is a close relationship between competition and ecological factors, such as soil fertility, water content, light and plant density. The response varies with the genotypes of varieties, the cytoplasmic-genetic male sterility and the practice of removing tassel by hand. The barrenness-resistance of a genotype also determines the optimum density under all environmental conditions. Through improve- ment of hybrids, addition of nitrogen fertilizer and increase in density per unit area, the yield of maize has been increased considerably, Therefore, selection and breeding of corn hybrid with multi-ears, resistant to disease and lodging, tolerant of close planting and fertility is the ideal breeding goal. Barrenness, i. e. a condition which deprives a corn plant of normal ears, is the main limiting factor of effective conversion of light energy to corn grains under close planting. The cause of barrenness is a complex one. Barrenness is relative to whether the source and the sink coordinate, and whether the flow is free. Besides, the effect of disease, pests and natural calamities is also conducive to barrenness. Therefore, only practical solution to the problem is through intergrate control and managemet. Barrenness is a plant characteristic most closely correlated with yield, the investigation of which many researchers were involved in the last 40 years. In this paper the author, based on his studies, made a comprehensive analysis of such issues as the effect of plant density and competition for light within a population upon barrenness of corn, the sugar content and activity of nitro-reductase in leaves, the effect of soil water and mineral nutrients on barrenness of corn, and the genetic cause of barrenness. This summary may be serve as a guidance for further studies on barrenness.

玉米“空秆”,即一株不能结一个正常果穗的玉米植株,是密植生长光能有效转换到王米籽粒的一种主要限制因素,是玉米植株对种间和种内竞争的一种生理反应。“空秆”形成的原因比较复杂。作者结合自己的研究工作,对四十余年来国内外对空秆形成的研究,从环境生态因子和遗传方面的原因,进行了综合论述和分析,为有关方面的科学工作者和农业技术人员进一步研究和排除这一产量限制因子,提供理论和实践经验方面的依据和资料。

The effects of soil water deficit in different stages of reporductive growth on the photosythetic organs, photosynthetic rate and photosynthetic products of faba bean (Vicia faba), cultivar 'Xichang Dabai' were investigated in a pot experiment. The experiment was conducted with six treatments of irrigation (Control) and drought at bud to initial bloom, initial bloom to full bloom, full bloom to initial pod, initial pod to full pod and full pod to plump pod stage.The results indicated that total...

The effects of soil water deficit in different stages of reporductive growth on the photosythetic organs, photosynthetic rate and photosynthetic products of faba bean (Vicia faba), cultivar 'Xichang Dabai' were investigated in a pot experiment. The experiment was conducted with six treatments of irrigation (Control) and drought at bud to initial bloom, initial bloom to full bloom, full bloom to initial pod, initial pod to full pod and full pod to plump pod stage.The results indicated that total photosynthesis, net photosynthesis. Chlorophyll content, leaf area, stomatal width, biomass and grain yield were decreased by all the soil drought treatments, but stomatal density and respiratory rate were increased. The light saturation point of droughty leaves was decreased from 50kLx to 30kLx, and the stomatal open of droughty leaves was 9—10 hour. The plant response at different growth stages to soil drought treatment was different. The plant of soil drought at the bud appearance to initial bloom stage was less affected, but the plant at initial pod to full pod stage was most sensitive to soil drought treatment. When the faba bean was dried at the stage, the biomass and grain yield per plant were reduced by 32.0% and 44.9%, respectively.The decreased level of the photosynthetic characteristic at different growth stages by soil drought treatment agrees with the level of biomass and grain yield. These results suggest that the initial pod to full pod stage is the critical moisture point of faba bean.

本文报道了蚕豆现蕾至饱荚期不同时间土壤水分亏缺情况下的光合特性、光合产量及蚕豆水分亏缺敏感期。蚕豆现蕾后给予土壤干旱处理。光合速率、叶绿素含量、叶面积、气孔开度、生物产量及籽粒产量下降,但气孔密度和呼吸速率增加。水分亏缺使叶片光饱和点由60kLx降至30kLx,气孔开度日变化呈单峰(9—11时)曲线。始荚至盛荚朋对土壤干旱最敏感,此期是蚕豆灌水的关键时期。

The effect of soil water on the development of cotton seeds was studiedunder the condition of pot culture in the years of 1986~1989. The results showed thatthe shortage of soil water during the flowering and boll period led to the harmful effecton seed numbers per boll. seed bulk, accumulation of dry matter. seed weight as well asaccumulation of oil and protein contents. The most serious effect was in the case ofshortage of water during the blooming stage. If less water was...

The effect of soil water on the development of cotton seeds was studiedunder the condition of pot culture in the years of 1986~1989. The results showed thatthe shortage of soil water during the flowering and boll period led to the harmful effecton seed numbers per boll. seed bulk, accumulation of dry matter. seed weight as well asaccumulation of oil and protein contents. The most serious effect was in the case ofshortage of water during the blooming stage. If less water was given in the first bloom-ing period. the vegetative growing could be controlled properly thereby to reduce wateruse. which is favourable for seed development and decreasing the ratio of kernel to bulkof cotten seeds and increasing the protein contents. Droughts can affect the developmentof cotten seeds more serious that that of fibers.

1986~1989年在盆栽条件下,研究了土壤水分对棉籽发育的影响。结果表明:整个花铃期缺水对单铃种子数、棉籽体积、干物质重量以及种子中脂肪和蛋白质的积累均有不良影响。但盛花期缺水对其影响最大;初花期轻度缺水,能适当控制营养生长,减少用水量,有利于棉籽的发育,降低棉籽壳仁比,增加蛋白质积累。干旱对棉籽发育的影响大于对纤维发育的影响。

 
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