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cycling
相关语句
  循环
    Characteristics of Nutrient Cycling in the Rice-wheat Rotation System
    水旱轮作体系中的养分循环特征
短句来源
    Studies on Nitrogen Cycling in Agricultural Ecosystems
    农业生态系统中氮素循环研究综述
短句来源
    A STUDY ON NUTRIENT CYCLING AND UTILIZING PATTERNS IN PADDY FIELD
    稻田养分循环利用模式的研究
短句来源
    The results showed the accumulation of soil organic carbon could be promoted, the fraction of soil humus could be improved and the quality of soil organic matter could be reformed under cycling of organic residue in red paddy system.
    结果表明,红壤稻田系统有机物料循环再利用可促进土壤有机碳的积累、改善腐殖质组分和改良有机质品质。
    The simulation result of SCNC model (Soil Carbon and Nitrogen Cycle ) showed the content of soil organic carbon could increase by 8.3-18.9g/ kg and the increasing ratio was up to 62.0 %-140.7 % after 50 years with organic residue cycling in red paddy system.
    预测结果显示,有机物料循环再利用土壤有机碳50年内可提高8.3~18.9 g/kg,增长率达到62.0%~140.7%。
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  “cycling”译为未确定词的双语例句
    Study on Soil Water Movement and Its Cycling on a Hillslope of the Loess Plateau
    黄土区坡地土壤水分运动与转化试验研究
短句来源
    A Study on Water Cycling and Water Use Efficiency of the Plantation SPAC in the Southern Loess Plateau
    黄土高原南部人工植被SPAC系统水分循环模式和利用效率研究
短句来源
    System Analysis and Dynamic Simulation of Nitrogen Cycling in Three Different Stages of Agricultural Development in Chagan Village.
    前查干村农业发展三个阶段氮循环的系统分析与动态模拟
短句来源
    CHAGAN, A DYNAMIC SIMULATOR OF NITROGEN CYCLING IN MIXED AGRO-ECOSYSTEMS
    CHAGAN,一个农牧结合生态系统氮循环的动态模拟程序
短句来源
    Quantintive Characteristics of Energy Flow and Nutrient Cycling of Farmland in a Farm Ecosystem in Hexi Corridor
    河西走廊农户生态系统农田能流和物流数量特征的研究
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  cycling
The nitrogen (N) cycling was elucidated in a 40-year-old subtropical evergreen broad-leaved forest dominated by Cyclobalanopsis glauca growing on red soil in Zhejiang Province, East China.
      
Compared with other forest types, cycling rate of N in the community was lower than in deciduous broad-leaved forests, rain forests, and mangroves, and was moderate in evergreen broad-leaved forests.
      
Fine root lifespan and turnover play an important role in carbon allocation and nutrient cycling in forest ecosystems.
      
Fine roots have enormous surface areas, growing and turning over quickly, which plays an important role in terms of substance cycling and energy flow in the forest ecosystem.
      
When investigating the substance cycling and energy flows of all forest ecosystems, we should consider the characteristics of different stands in order to improve the precision of our estimates.
      
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The following aspects of agro-ecosystem are being studied in terms of economics : ( 1) Agro-ecosystem is the result of human economic activities with a definite economic goal. After the formation of agro-ecosystem, it is unable to exist without continued human asistance or interference. (2 ) The function of agro-ecosystem is determined by human economic behavior. Various measures are being employed to control or interfere with the natural environment, plants, animals, and microbes so as to ameliorate the function...

The following aspects of agro-ecosystem are being studied in terms of economics : ( 1) Agro-ecosystem is the result of human economic activities with a definite economic goal. After the formation of agro-ecosystem, it is unable to exist without continued human asistance or interference. (2 ) The function of agro-ecosystem is determined by human economic behavior. Various measures are being employed to control or interfere with the natural environment, plants, animals, and microbes so as to ameliorate the function of the agro-ecosystem. (3) The economic result of energy transformation and material cycle is to create use value. The divers factors and elements within the agro-ecosystem can be refered as potential use values which move synchronously with energy flow and material flow . When the potential use values are gradually accumulated to a certain degree, they will be transformed into use values that can satisfy human wants. (4) The exchange of commodities is the major cause for the output and input of energy and material between agro-ecosystems. As the energy and material go out together with the commodities from the original agro-ecosystem the need for an input of proper amount of energy and material by suitable way is unavoidable. The complements maintain the balance of output and input in order to allow the agro-ecosystem to play its role continuously in the future economic reproduction.

本文从经济学角度对农业生态系统进行下列几方面探讨:(1)农业生态系统是人类抱着一定经济目的进行经济活动的产物。建成后没有人类扶持或干预农业生态系统就不能继续存在。(2)农业生态系统的功能主要是受人类经济活动所控制。对自然环境、植物、动物和微生物四个要素。采取各种不同办法进行干预和控制,以提高整个农业生态系统的功能。(3)能量转化和物质循环的经济成果是创造使用价值。农业生态系统内的各种因素是潜在的使用价值,与能量流和物质流同步运动。逐渐积累而转化为能满足人类需要的使用价值。(4)商品交换是造成农业生态系统间的能量和物质输出及输入的主要原因。由于商品交换,能量和物质随着农产品离开本农业生态系统,必须采取适当办法输入适量的能量和物质作补充,以保持其平衡,才能使农业生态系统在进行经济再生产时继续发挥作用。

This paper discussed the changeability of the pH and Eh values in paddy soils(originated from Xia-Shu loess)at rice-wheat(or rade) system.The paddy soils have a seasonal variation in topsoil pH and Eh,and submerge for most of the rice-growing period,where pH and Eh is neutral in reaction in the reduced condition, and pH and Eh of the dryland are usually subacid and oxidized.The percogenic horizon is near neutral and oxidized condition at cycle.This is closely connected with the profile development of the...

This paper discussed the changeability of the pH and Eh values in paddy soils(originated from Xia-Shu loess)at rice-wheat(or rade) system.The paddy soils have a seasonal variation in topsoil pH and Eh,and submerge for most of the rice-growing period,where pH and Eh is neutral in reaction in the reduced condition, and pH and Eh of the dryland are usually subacid and oxidized.The percogenic horizon is near neutral and oxidized condition at cycle.This is closely connected with the profile development of the paddy soil.

本文着重于讨论下蜀黄土起源的水稻土在稻麦轮种下土壤酸碱度和氧化还原电位的变化。 水稻土的耕层土壤酸碱度和氧化还原电位具有季节性的变化。水稻生育期大部分时间渍水,土壤处于还原态条件,土壤酸碱度为中性;旱地时土壤酸碱度和氧化还原电位状况通常是弱酸性和氧化态。渗育层下段终年为氧化态和接近中性。这些是与水稻土剖面的发育密切相关。

A water gate on fidal Channel is operated automutically through theuse of microcomputer controlling device. The gate discharges or leadsin 300000m~3 more water in a tidal cycle as compared with manual opera-tion. The main considerations in the development of the derice are pre-sended in this paper.

多孔潮水闸自动控制仪,在国内属首次研制成功。该控制仪可利用潮汐自动控制引水和排水。和人工操作相比,每潮次可多引或多排水30万立方米左右。

 
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