助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   土壤肥力评价 的翻译结果: 查询用时:0.012秒
图标索引 在分类学科中查询
所有学科
农业基础科学
农艺学
林业
更多类别查询

图标索引 历史查询
 

土壤肥力评价
相关语句
  soil fertility evaluation
     Soil fertility evaluation based on geographic information system and gray relative analysis
     基于GIS与关联分析的土壤肥力评价
短句来源
     Soil Fertility Evaluation Based on GIS at Town and Township Level
     GIS支持下乡镇域土壤肥力评价与分析
短句来源
     The“integrated soil enzyme factor”may be taken as an index for soil fertility evaluation.
     “综合土壤酶因子”可作为土壤肥力评价的一个指标
短句来源
     To set a typical township in red soil (Ultisols) hills of Hubei province as an example, the methods and process of soil fertility evaluation were studied at township level based on GIS (Geographical Information System), and the reason why soil fertility changed was also discussed.
     在地理信息系统支持下,以鄂南典型红壤丘陵区为例,研究了乡镇域土壤肥力评价的方法和过程,分析了土壤肥力变化原因。
短句来源
     Soil fertility evaluation of planted forest land on the hilly-gullied Loess Plateau
     黄土丘陵区人工林地土壤肥力评价
短句来源
更多       
  “土壤肥力评价”译为未确定词的双语例句
     Evaluation of the Planting Tobacco Soil Fertility and Study on the Tobacco Fertilizing Technologies in Xuan-en
     宣恩植烟土壤肥力评价及烤烟施肥技术研究
短句来源
     Evaluation of Soil Fertility in Pinus taiwanensis Seed Orchard and Improvement Measures in Tiantai of Zhejiang
     天台黄山松种子园土壤肥力评价与改良措施
短句来源
     Research on evaluation norm and method of soil fertility
     论土壤肥力评价指标和方法
短句来源
     Studies on the fertility of mountain soil in the west of Sichuanbasin,Sichuan province
     四川盆地西缘山地土壤肥力评价
短句来源
     It is suggested that the status of soil nutrients and their equilibrium, structure and soil environmental conditions be considered in fertility evaluation.
     划分了四种土壤肥力类型,并认为湖州市土壤肥力评价的原则应是土壤养分因子、土壤结构因子与环境因子的协调程度。
短句来源
更多       
  相似匹配句对
     soil fertility;
     土壤肥力
短句来源
     3 The integrated evaluation of soil fertilityPrincipal component and gray theory analysis showed that soil fertility sampled form twenty-four sunlight greenhouses could plot four ranks.
     3、土壤肥力的综合评价
短句来源
     Preliminary studies on the integrated evaluation of soil nutrient fertility
     土壤肥力综合评价初步研究
短句来源
     Evaluation and analysis on Chuangye farm's soil fertility
     创业农场农田土壤肥力评价
短句来源
     Research on evaluation norm and method of soil fertility
     论土壤肥力评价指标和方法
短句来源
查询“土壤肥力评价”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
没有找到相关例句


In this paper the soil considered as an open irreversible nonequilibrium systems, substances may be added or removed from it,that might be necessary to have energy flowing through the systems during substances conversion process is occured.The concept of entropy produced in systems which is the site of these irreversible processes plays an important role in nonequilibrium thermodynamics.However, the dissipative fraction of the energy during per unit substance conversion in fertility processes may be recognized...

In this paper the soil considered as an open irreversible nonequilibrium systems, substances may be added or removed from it,that might be necessary to have energy flowing through the systems during substances conversion process is occured.The concept of entropy produced in systems which is the site of these irreversible processes plays an important role in nonequilibrium thermodynamics.However, the dissipative fraction of the energy during per unit substance conversion in fertility processes may be recognized as the entropy of the soil systems.Consider,for example, organic matter or humus is an important energy source material in the soil and the nitrogen content in it which varies in a given range is the characteristic property of the energy soarce material.Decomposition of a given material would result in mineralization of a given available nitrogen content which is absorbed by green plants to formed a given crop yield, in humus decomposition processes, energy released, we may look this process as the energy flowing through the systems.A fraction of the total energy is supposedly available for converting to useful work it should be noted that it is the free energy which forms the energy amount of the crop yield, another fraction of the total energy would become a state of dissipation which was dissipaed by "friction".If the total energy comes from the organic matter decompostion minus the free energy that forms the crop yield energy, then it is divided by the released available nitrogen content per unit area, the result of this caculation may be recognized as the iutial entropy of he soil systems. As the chemical nitrgen fertilizer was added into the soil systems, the soil systems state would be changed and would produce a change in entropy.we could caculate the change of the entropy.The total entropy of the whole systems may be defined as the sum of the intial entropy and the change of the entropy,it is a complex index which measure the degree of order or the fertility of the soil systems.The high yield of soils and the the high chemical fertilizer conversion rate leads to a decrease of soil systems entropy.

本文根据耗散结构理论提出表征土壤肥力的土壤系统熵的概念,其定义是土壤系统中单位物质转化过程中的势能耗损。对应Schrodinger的负熵理论,土壤系统熵越低,土壤肥力越高。土壤系统熵可分为两部分,一是表征土壤基础肥力的,命名为起始熵(S_0)。另一是表征土壤人工肥力的,指因化学氮素投入所引起系统状态的变化,称为熵变(S_1),土壤系统熵(S_E)是两部分之和:S_E=S_0+S_1是土壤生产力和系统转换效率的综合指标。土壤系统熵值有稳定性,可作为土壤分类的依据。因为熵值计算排除了空间条件和不同作物种类与其它偶然因素对评价土壤肥力的影响,因而可供比较应用。土壤系统熵既反映了系统的结构状态,也反映了输入能量的可用程度,因此是土壤做为一个耗散结构的基本性质指标,从而实现了土壤肥力评价中的生态效率和经济效益的结合,并且为系统论土壤学的研究对象提供了认识的基础。土壤系统熵和土壤信息量有同等意义,是对土壤系统进行最优化反馈控制的依据。文中列举了土壤系统熵的计算方法,并讨论了它的实际应用。

In this paper, we try to grade soil fertility by mathematical methods of analsis of principal components and judgement of diseriminant functions. The classification involves the first and the second principal components as these two represent 60 per cent of all original information about twelve aspects of soil characteristics. We divided 25 soil profiles into five grades by setting up discrminant function formulas and secured satisfactory results. The results show that it is effective and feasible to use this...

In this paper, we try to grade soil fertility by mathematical methods of analsis of principal components and judgement of diseriminant functions. The classification involves the first and the second principal components as these two represent 60 per cent of all original information about twelve aspects of soil characteristics. We divided 25 soil profiles into five grades by setting up discrminant function formulas and secured satisfactory results. The results show that it is effective and feasible to use this method in appraisaing and grading soil fertility.

本文应用主组元分析和判别函数式判别的数学方法对土壤肥力的分级作了尝试,分级按第1、第2主组元进行,第1、第2主组元表达所用12项土壤性质原始数据信息量的60%;通过建立判函数式判别将25个供试土壤剖面分为5个级组,收到了较好的效果。结果表明这类数学方法在土壤肥力评价分级方面使用是有效和可行的。

This paper probes into the application of Statistical methods (principle component analysis and cluster analysis ) for soil fertility evaluation. The results point out that there are five comprehensive factors in soil fertility evaluation, in which the nutrient factor and structure factor affect soil fertility more strongly than any other factors. All plots may be divided into four types according to soil fertility. It is suggested that the status of soil nutrients and their equilibrium, structure and soil environmental...

This paper probes into the application of Statistical methods (principle component analysis and cluster analysis ) for soil fertility evaluation. The results point out that there are five comprehensive factors in soil fertility evaluation, in which the nutrient factor and structure factor affect soil fertility more strongly than any other factors. All plots may be divided into four types according to soil fertility. It is suggested that the status of soil nutrients and their equilibrium, structure and soil environmental conditions be considered in fertility evaluation.

本文应用主组元分析和聚类分析等统计方法评价了湖州市稻田土壤肥力状况。分析结果提出了五个综合性的土壤肥力评价因子。其中最主要的是养分因子和结构因子;划分了四种土壤肥力类型,并认为湖州市土壤肥力评价的原则应是土壤养分因子、土壤结构因子与环境因子的协调程度。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关土壤肥力评价的内容
在知识搜索中查有关土壤肥力评价的内容
在数字搜索中查有关土壤肥力评价的内容
在概念知识元中查有关土壤肥力评价的内容
在学术趋势中查有关土壤肥力评价的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社