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   the black soil 在 农业基础科学 分类中 的翻译结果: 查询用时:0.54秒
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  东北黑土区
    Analysis of the Changing Characteristics of the Soil Fertilities in the Black Soil Area of Northeast China
    东北黑土区土壤肥力变化特征的分析
短句来源
    Characteristics of Soil Temperature Dynamics in the Black Soil Area of Northeast China
    东北黑土区土壤温度变化特征
短句来源
    Spatial distribution of particulate organic carbon and aggregate associated carbon in topsoil of a sloping farmland in the Black Soil region,Northeast China
    东北黑土区坡耕地表层土壤颗粒有机碳和团聚体结合碳的空间分布
短句来源
    Although there are some similarities in natural conditions in the three black soil regions,the black soil in China is prone to be eroded for its undula ting relief.
    通过比较分析认为:在自然条件上虽然三大黑土区具有一定的相似性,但我国东北黑土区由于地势起伏相对较大,更易遭受水土流失的危害;
短句来源
    The black soil region in northeast China has become one of the most important regions for cereal grain production, while soil degradation is increasingly serious with the gradual reclamation of black soil resource.
    东北黑土区是我国重要的商品粮生产基地,但随着黑土资源的不断开垦,土壤退化问题日益加剧。
短句来源
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  东北黑土区
    Analysis of the Changing Characteristics of the Soil Fertilities in the Black Soil Area of Northeast China
    东北黑土区土壤肥力变化特征的分析
短句来源
    Characteristics of Soil Temperature Dynamics in the Black Soil Area of Northeast China
    东北黑土区土壤温度变化特征
短句来源
    Spatial distribution of particulate organic carbon and aggregate associated carbon in topsoil of a sloping farmland in the Black Soil region,Northeast China
    东北黑土区坡耕地表层土壤颗粒有机碳和团聚体结合碳的空间分布
短句来源
    Although there are some similarities in natural conditions in the three black soil regions,the black soil in China is prone to be eroded for its undula ting relief.
    通过比较分析认为:在自然条件上虽然三大黑土区具有一定的相似性,但我国东北黑土区由于地势起伏相对较大,更易遭受水土流失的危害;
短句来源
    The black soil region in northeast China has become one of the most important regions for cereal grain production, while soil degradation is increasingly serious with the gradual reclamation of black soil resource.
    东北黑土区是我国重要的商品粮生产基地,但随着黑土资源的不断开垦,土壤退化问题日益加剧。
短句来源
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  the black soil
Responses of photosynthetic rates and yield/quality of main crops to irrigation and manure application in the black soil area of
      
Plant residue on the soil surface increased the reflected light over the black soil and decreased it over the light-colored soils.
      
Flooding treatment enhanced the uptake of all these fission products by rice plants in the laterite soil whereas this effect was observed only for125Sb and137Cs in the black soil.
      
In contrast, the uptake of144Ce and137Cs was greater in the laterite than in the black soil.
      
Results indicated greater uptake of106Ru and125Sb from the black soil than from the laterite.
      
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Pot culture experiments were carried out on the black soil from Harbin and the paichiang soil from Hwachuan Hsien,both of Heilungkiang Province.Application of superphosphate alone increased the yield of wheat in the paichiang soil but not in the black soil.Combined application of nitrogenous and phosphatic fertilizers increased the yield of wheat in both soils. Uptakes of phosphorus by wheat at various stages of plant growth were examined by tracing technique.In the black soil,addition...

Pot culture experiments were carried out on the black soil from Harbin and the paichiang soil from Hwachuan Hsien,both of Heilungkiang Province.Application of superphosphate alone increased the yield of wheat in the paichiang soil but not in the black soil.Combined application of nitrogenous and phosphatic fertilizers increased the yield of wheat in both soils. Uptakes of phosphorus by wheat at various stages of plant growth were examined by tracing technique.In the black soil,addition of ammonium sulphate encouraged the uptake of soil phosphorus by plant,while in the paichiang soil the main supply of phos- phorus to plant was from superphosphate.

1.盆栽条件下黑土单施磷肥使小麦减产8.69—15.51%。磷肥和氮肥配合施用可提高磷肥肥效,小麦产量增加了184.44—314.58%。单施氮肥增产224.37—289.54%。白浆土单施磷肥可使小麦增产7.95—38.25%。单施氮肥增产149.83—160.26%,而磷肥与氮肥配合施用增产达176.85—429.91%。2.小麦产量的提高与植株总磷量,特别是与吸收肥料磷量占全磷的比例有密切关系,植株中肥料磷增加,产量亦相应提高。黑土中有效磷合量为7.83—13.11毫克/100克土;白浆土为1.46—4.99毫克/100克土。因此,黑土上小麦吸收土壤磷素较多,肥料磷较少;白浆土上则相反。3.小麦植株含氮量随着含磷量而相应提高。黑土氮磷配合施用,可使小麦对肥料磷利用率提高4.45—21.48%,土壤磷利用率提高1.61—4.99%。白浆土氮磷配合施用,肥料磷利用率提高17.69—28.89%,土壤磷利用率提高0.74—1.02%。

The water regime in cultivated black soils are not only influenced by the climatic factors, but also by the crops. In the black soils under different crops, there were obvious difference in the levels of soil humidity and the residual water in soils after harvest of crops. In wheat fields, an high evapotranspiration intensity with a peak which happened earlier and a maximum annual rate of evapotranspiration were found. But in fields of intertilled crops such as soybean and corn,...

The water regime in cultivated black soils are not only influenced by the climatic factors, but also by the crops. In the black soils under different crops, there were obvious difference in the levels of soil humidity and the residual water in soils after harvest of crops. In wheat fields, an high evapotranspiration intensity with a peak which happened earlier and a maximum annual rate of evapotranspiration were found. But in fields of intertilled crops such as soybean and corn, the evapotranspiration intensity was lower, the evapotranspiration peak came later and the annual rate of evapotranspiration was smaller. In the same year, soil humidity in wheat fields was lower than that in soybean and corn fields, and the residual soil water in wheat field after harvest was the smallest.

田间观测比较证实:耕地黑土的水分状况和农田水分循环过程不仅受气候因素所控制,同时也明显受作物种类不同所影响。因此,不同作物下黑土农田的水分状况,表现在土壤湿度水平、各水分时期出现时间、作物收获后残留土壤中的水量等方面均有明显区别。小麦地蒸发强度大,蒸发高峰出现早且具有最大的年总蒸发量;大豆、玉米等中耕作物蒸发强度弱,蒸发高峰出现晚且具有较小的年总蒸发量。因此,在同一年里小麦地土壤湿度通常要比大豆、玉米地低,残留在土壤中的水分因而也最少。

As a part of the study of Keshan disease and kaschin-Beck' s disease are associated with geographical environment, We have collected 236 soil samples from various natural zones in China and analysed their selenium content by fluorence spectropotometry.The frequency of se-content in the soils mainly shows a logarithmicnormal distributions, so geometric average is adopted in this research work. The results obtained are as follows.1. The average Se-content in the soils in China is 0.16 ppm, that...

As a part of the study of Keshan disease and kaschin-Beck' s disease are associated with geographical environment, We have collected 236 soil samples from various natural zones in China and analysed their selenium content by fluorence spectropotometry.The frequency of se-content in the soils mainly shows a logarithmicnormal distributions, so geometric average is adopted in this research work. The results obtained are as follows.1. The average Se-content in the soils in China is 0.16 ppm, that is, lower than the mean Se leve in the soil of the world.2. The geographical distribution of the Se content in the soils shows a beltformal regional differentiation. The belt, that consists of dark-brown forest soil, black soil, drab soil, dark Loessial Soil, purple soil, Alpine-and Sub-alpine meadowsoil ,is a low selenium zone of soil running from northeast to southwest in China .The average Se contents in the soils in this belt range from 0.06 to 0.12PPm. So there are other two belts in the Northwest and the Southeast on both sides of the low selenium zone, and their average Se contents in the soils range from 0.11 PPm to 0.32 PPm. This situation of the soil Se geographical distribution is similar to that for the grains and also for the human hairs.3. In the Northwest belt with arid and semiarid features, the Se contentsof soils in the eluvial landscape in the mountains are lower than that in the subordinate landscape in the basins and the flood-fan deltas. It indicates that the activity of selenium in alkaline environment is higher. In the red-Yellow soil zone in the Southeast, on the contrary, the Se contents of soils on mountains and hills are higher than in the fluvial plains. It indicates the Se-accumulation in the re-yellow soil.4. Within the low selenium zone, the Se contents in the Black soil and Dark-brown forest soil are higher than in the drab soil, dark loessial soil and purple soil. The Se contents in the soils on the mountains, hills and high plains are lower than the Se contents in the cultivated fluviogenic soil on the plains and fluvial terraces.5. The low selenium soil zone corresponds to the regionswh ere the keshan disease and Kaschin-Beck's disease in man and white Muscle disease in animal occur. The difference of the soil Se contents between the disease region and the nondisease region is significant statistically. It Shows that the low selenium content in the soils is the one of the basic factors leading to low Se content in the grains and therefore the occurrence of the disease in low selenium regions.Finally, the paper also discussed the factors, which influence the distribution of Se in soils, and the possibility of increasing the Se content in the grain by improving the soil to prevent the disease.

本文根据采自全国各地的236个土壤剖面表层样品的硒测定数据,讨论了我国土壤表层总硒的统计分布和地理分布特点及其与人畜硒反应病的关系。从土壤角度进一步论证了以棕褐土系列为中轴的低硒生态地理环境是我国克山病、大骨节病和动物白肌病的共同致病环境,而低硒土壤则是这一生态地理环境的基础。

 
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