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土壤肥力变化     
相关语句
  soil fertility change
     A Study on Soil Fertility Change with Different Reclamation Methods and Years of Subsiding Mined Land
     煤矿塌陷区不同复垦方法及年限土壤肥力变化研究
短句来源
     Soil Fertility Change and Fertility Improvement in Wheat/ Maize Strip Intercropping Ⅱ.Effects of Different Fertilizers on Contents of Soil Nutrients
     小麦/玉米带田土壤肥力变化及培肥*Ⅱ.不同肥料对土壤养分含量变化的影响
短句来源
     Study on the Soil Fertility Change and Long-Term Maintenance of Productivity in Chinese Fir Plantation
     杉木林土壤肥力变化和长期生产力维持研究
短句来源
     Soil Fertility Change and Fertility Improvement in Wheat/Maize Strip Intercropping I.Effects of Fertility Change and Different Fertilizer on Crop Yields
     小麦/玉米带田土壤肥力变化及培肥*Ⅰ.肥力变化及各种肥料对作物产量的影响
短句来源
     Studies on Soil Fertility Change in Acacia mangium Plantation in Nanning,Guangxi
     广西南宁马占相思人工林土壤肥力变化的研究
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  soil fertility changes
     Soil fertility changes and cultivate suggestions in Dezhou city
     德州市土壤肥力变化及培肥建议
短句来源
     Influence of Land Utilization on Soil Fertility Changes in Kenfu Demonstration Area of Environmental Immigrants, Northwest Guangxi
     桂西北肯福环境移民示范区土地利用对土壤肥力变化的影响
短句来源
     Soil fertility changes of cultivated land in Eastern China
     中国东部地区耕地土壤肥力变化趋势研究
短句来源
     A long-term field trial on fertilization and on use of recycled nutrients in farming systems Ⅳ.Soil fertility changes.
     辽西褐土施肥及养分循环再利用中长期试验Ⅳ.土壤肥力变化
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     Study on the Soil Fertility Changes in Planting Base to Develop the Special Fertilizer for Cultivation of Chrysanthemum morifolium
     药用菊花种植基地土壤肥力变化和菊花专用肥的研究
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  soil fertility dynamics
     Effective fertilization and soil fertility dynamics in deteriorate pasture of red-soil in Yunnan-Guizhou plateau of China
     云贵高原红壤退化人工草地土壤肥力变化与有效施肥技术研究
短句来源
  change of soil fertility
     This paper describes a preliminary study on the mineral cycling in a subtropical montane forest, the secondary vegetation succession and the change of soil fertility.
     本文是亚热带山地矿物质循环,植被演替与土壤肥力变化的初步研究。
短句来源
     Change of Soil Fertility of the Forest Land in Which Mixed Forest of Cunninghamia lanceolata and Broad-leaved Trees Was Constructed After Continuous Planting Cunninghamia lanceolata
     杉木多代连栽林地营造杉阔混交林后的土壤肥力变化
短句来源
     On the basis of data on soil acidification and heavy metals pollution in Nanjing city and Suzhou city, and the change of soil fertility in Pei county and Tongshan county, the thesis investigates and scurvies and socio-economic development of these regions.
     “对策分析”在南京和苏州的土壤酸化和重金属污染,沛县和铜山的土壤肥力变化等有关数据的基础上,对这些地区的经济和社会发展进行了调研。
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      soil fertility changes
    Soil fertility changes and response of maize and beans to green manures of leucaena, sesbania and pigeonpea
          
    Fodder grass productivity and soil fertility changes under four grass+tree associations in Kerala, India
          
    Fodder grass productivity and soil fertility changes under four grass+tree associations in Kerala, India
          


    The biocycling of nitrogen and mineral elements of wheat, barley, maize, sorghum and peanut grown on the calcareous cinnamon soil in Beijing was studied. The results are shown as follows:

    京郊耕地碳酸盐褐土小麦、大麦、玉米、高梁、花生五种农作物氮及灰分元素生物循环的研究结果表明。1.不同作物存留、归还、吸收不同元素数量的差别很大。豆科作物花生以对钙、镁吸收量大为其显著特征;禾本科作物吸收较高数量硅、铁、铝、锰、钠。在四种禾本科作物中,高粱吸收较高数量氮、磷、钾、钙、镁、硅,大麦吸收较高数量钠、硫和锰。2.不同作物以根、茬形式对11种元素和灰分向土壤中的归还有三种情况:1)低度归还类型:氮磷钾,归还比例一般低于10%;2)中度归还类型:镁钙硫硅钠和灰分,归还比例介于10—30%;3)高度归还类型:铁铝和锰,归还比例一般为30%。3.不同农作物生物循环特点对研究农田生态系统元素平衡、耕地土壤肥力变化和形成过程以及施肥、耕作制度改革,都有重要意义。

    According to the dissipative structure theory conceived by the Belgum Brussells school led by Prigogine, the soil treated as an open irreversible non-equilbrium systems, it might necessary to have energy flows into or out of the soil systems during fertility process so that we could write for the differential change in entropy: Ds=Dis +Des where Dis is due to changes within the system and Des is due to flow of energy into the system from the exterior. The soil systems is an open system, substances and energy...

    According to the dissipative structure theory conceived by the Belgum Brussells school led by Prigogine, the soil treated as an open irreversible non-equilbrium systems, it might necessary to have energy flows into or out of the soil systems during fertility process so that we could write for the differential change in entropy: Ds=Dis +Des where Dis is due to changes within the system and Des is due to flow of energy into the system from the exterior. The soil systems is an open system, substances and energy may be added or removed from it, we can see the phenomenon of soil fertility as the Benard effect in the hy- drodyuamics of a heated fluid, there dissipative structure appears only when the system is reacting far from equilibrium. Considerable flow of energy along the input gradient in the systems provides the possibility for a dissipative process to occur, which maintains the interior of the system is the form of energy and mass flow that is far moved from equi(?)brim or even from the steady form of energy transformation. Soil fertility is a dynamic process which includes nonlinear steps, the value of soil fertility would not become synonymous of soil physical and chemical properties but depends on the forms of soil management varies with different crops and climats, it is a total function of the whole solum-plant-environment system the concepts of which are different from the classical concepts of pedology; in author's opinion, the classical pedology is not true soil science but solum science. According to the theory of dissipative structure, the change of soil fertility may be mathematically defined as follows: (dx)/(dt)=F x+Gu where dx/dt denotes the change of soil fertility, F→ denotes the structure states of the systems and G→ denotes the input of energy, if maintain the systems structure constant the soil fertility only depends on the input of energy, it means that the spaitial distribution of agricultural soil fertilty is not randomized but depends on the local position and energy sources, men are energy sources, so the fertility of agricultrual soils was related to the density of population, this may be reconized as a population soil fertility law. Soil systems are dissipative structures either in spatial distribution or in time sequence, and the electrode electric current could use as an index of vibration of soil—fertilizing factors. The concept of soil entropy was proposed out in this paper. The concept of entropy production in soil systems which is the site of irreversible process and plays an important role in non-equilibrium systems. The increase in entropy means decrease in order or increase in disorder, it is possible to obtain a quantitative relation between entropy and soil fertility.More concepts such as soil automatic control function and the law of yield worth feedback of soil fertility which were also proposed out, the disscusion of these definitions has been given in detail in this paper. All of these new concepts are used to develop a new science so-called system pedology and the dissipative structure theory which is the theoretical basis of this new science. If we want to apply soil science to prat(?)tive better, we shall need to formulate this new science.

    本文应用Prigogine提出的耗散结构理论于土壤肥力研究,指出土壤乃是一个开放的、非均匀和非平衡的、以不可逆热力学过程为特征的系统。它不仅在空间上是一个耗散结构,而且在时间上和功能上都是一个耗散结构。作者提出了土壤肥力的人口定律,指出农业土壤肥力是人口密度的函数。人口密度在空间上的不均匀分布,决定了农业土壤肥力的不均匀但有规则的分布。在时间上做为一个耗散结构,则可用植物—土体系统电极电流随时间的振荡做为一个说明。文中提出了土壤熵的概念,指出土壤中物质能量的聚散同结构有序度的联系。提出了简化的土壤肥力系统分析的数学模型,说明土壤肥力的变化被决定于系统的结构状态和能量的输入。作者区别了土体肥力性质和土壤肥力的概念,认为土壤肥力不是各种土体肥力性质的线性叠加,而是土体一植物一环境系统整体功能的表现。文中讨论了土壤肥力自动调节的概念,土壤对外界环境条件变化之适应,被认为是土壤系统自组织化或自动调节功能之本质。文中还提出了土壤肥力产值反馈的概念,并讨论了耗散结构理论应用于土壤肥力研究对发展土壤科学和服务于生产的实际意义。

    Simon-Kumada's method was used for determining humuscomposition of the main soil types-chernozem, black soil,planosol and meadow soil in Jilin Province which have been improved with manure. Results show that after improvement PQ. A logk and TF are increased; and RF is decreased with the increase of fertility. These changes are coincided with the agrochemical properties and enzymatic activity in these soils. It may be concluded that A logk and RF is the best ndices for the soil fertility and may be used in the...

    Simon-Kumada's method was used for determining humuscomposition of the main soil types-chernozem, black soil,planosol and meadow soil in Jilin Province which have been improved with manure. Results show that after improvement PQ. A logk and TF are increased; and RF is decreased with the increase of fertility. These changes are coincided with the agrochemical properties and enzymatic activity in these soils. It may be concluded that A logk and RF is the best ndices for the soil fertility and may be used in the study iof humus composition of soils.

    本文采用熊田的分析方法,对吉林省的主要土类黑钙土、黑土、白浆土、草甸土等经过培肥后测定了它们的腐殖质组成。结果表明:经过培肥后,土壤的PQ、△logk、TF随土壤肥力的提高而增高,RF则减少。这种变化与土壤的农业化学性状、土壤酶活性的变化基本相符。作者认为,△logk、RF可作为土壤培肥的指标,并可应用熊田的方法来研究土壤肥力的变化。

     
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