fertility index 中文意思是什麼
fertility index
解釋
繁殖力指數-
They are jinfo mountain in nanchuan county ( natural protection section ), wuling mountain in qianjiang county ( national emphases forest demonstration county which forest cover rate is beyond 50 % ) and zhongliang mountain in beibei county ( artificial destruction is very grave ). some main land use patterns i. e. woodland, garden, infield, abandon infield, shrub and grassplot are selected in those three sample sites. four aspects on soil fertility index of karst environment under different land use patterns in these three sample sites, are revealed in this paper, by using the field test, indoor measure and analysis, outdoor experiment and field investigation, and the knowledge and technique of soil, ecology, physics and chemistry etc. they are physical characteristic ( effective soil thickness, organic layer thickness, soil texture, water - stable aggregate and soil water etc. ), chemical fertility ( organism, omni - n, omni - p, omni - k, alkali - nitrogen, available p, available k and rapid available k etc. ), soil animalcule ( bacteria, fungi, actinomyces and their grosses ) and soil - seed - pool ( plant community diversity index ) in karst ecosystem
本研究以重慶市的南川金佛山（自然保護區） 、黔江武陵山（國家重點退耕還林示範縣，森林覆蓋率50以上）和北碚中梁山（遭人為破壞嚴重）典型巖溶區為對象，選擇了幾種重要的利用方式，包括林地、果園、耕地、棄耕地和灌草坡，採用野外巖溶生態調查和室內試驗測量分析相結合的方法，以不同土地利用方式巖溶土壤肥力為重點，對不同土地利用方式土壤肥力特徵進行量化分析，找出巖溶土壤肥力差異的主要方面及其根本原因，論文主要從土壤剖面物理退化指標（有效土層厚度、有機質層厚度、質地、團聚體、水分含量等） ，化學肥力退化指標（有機質、全n 、全p 、全k 、堿解n 、速效p和速效k等） ，樣地土壤微生物指標（細菌、真菌、放線菌數量及總量）以及樣地土壤種子庫植物群落多樣性等4個方面對重慶典型巖溶區的土壤肥力特徵進行了較為詳細的分析研究，為巖溶地區士壤資源的合理利用及結構的調控管理提供依據。 -
The results are summarized below : 1 ) study on soil science indicates that soil granular structure is the focus adjuster for soil fertility and it affects the space, water - grasp, aeration and anti - erosion of soil. and the percentage of aggregate is one of the key index that decides the speed and extent of soil erosion, hardening and degeneration because the soil degeneration will first lead to the disappearance of crumb - structure. so it is very important that the physical course and character of soil in different land use pattern are realized
現將主要結果摘要如下： l 、士壤學研究表明，團粒結構是土壤肥力的中心調節器，影響著土壤的空隙性、持水性、通透性和抗蝕性；任何土壤的退化首先將表現出團粒結構的消失；團聚體百分比是決定土壤侵蝕、板結等物理過程速度和幅度的關鍵指標之一，了解不同土地利用和土壤管理方式的物理過程和性質相當重要。 -
Wheat - maize interplanting of both crops ' high yield features shorter cycling period, higher multiple cropping index, stronger fertility exhaustion and no time for soil fertility to recover
小麥-玉米套種兩作產量皆高是以周期短、復種指數高、肥力耗竭強為特徵，土壤肥力沒有時間得以復原。 -
Other factors that were found to have positive effects on soil nutrients include the multiple cropping index and the practice of plowing stalks back into the land. these findings lead to several policy recommendations. first, it shows that economic variables are very important in determining changes in soil fertility, and therefore the theory and method of economics should be taken seriously by soil scientists
然後，根據理論預期以及單因素分析結果，我們建立了土壤肥力變化的社會經濟及政策影響因素模型，分別採取差分和固定效應兩種具體模型形式，對各種可能的社會經濟及政策因素對土壤肥力變化影響的方向和程度做了定量估計。 -
Based on the cultivated land fertility, according to grain yield, the planting coverage, the ratio of the grain crops to industrial crops and multiple crop index, the cultivated land population carrying capacity in 2010 and 2030 at the different population increasing modes were attained by predicting and analysing the food produce and the cultivated land carrying capacity
摘要以耕地地力為基礎，根據糧食單產、種植面積、糧經比和復種指數對河南省糧食產量和耕地資源承載力進行了預測和分析，得出不同人口增長模式下的河南省2010年和2030年耕地資源人口承載力。 -
Based on the principle of significant effect of soil fertility factors on forest growth, soil physical factors ( natural water content, bulk density, total porosity, capillary porosity, aggregate degree, coarse silt and physical clay ), chemical factors ( om. total n, alkali - hytrolyzable n, total p, humus and ha / fa ) and biological factors ( urease, acidphosphotase, invertase and microbes ) were selected as evaluation index system of soil fertility. applying principal component analysis, soil ifi of subalpine coniferous forest was calculated
從土壤物理、化學、生物學三方面出發，建立了川西亞高山針葉林不同演替階段土壤肥力評價指標體系，應用主成分分析，計算出不同演替階段土壤肥力綜合指標值（ ifi ） ，各演替階段大小順序為： 10年生雲杉林地跡地原始林地次生樺木林地30年生雲杉林地20年生雲杉林地50年生雲杉林地60年生雲杉林地40年生雲杉林地。 -
Soil organic matter can be regarded as one of soil fertility index, so manure culture and maize straw treatment is beneficial for soil fertility
土壤有機質可作為土壤肥力指標之一，所以採取有機肥培肥和秸稈還田的培肥模式，有利於培肥土壤，提高土壤肥力。 -
Takeing drought - resistant index and drought - resistant coefficient as evaluation indicators, also considering their fertility and stability of yield, germplasms that showed fine character were rongjiang cihong, luodian juhuang, wangmo huang, ziyun jianzuihong, wangmo mashan hong, ziyun huang and so on
以抗旱系數和抗旱指數為主要評價指標，兼顧其穩產性和豐產性，表現優良的種質有：榕江刺紅苞谷，羅甸桔黃苞谷，望謨黃苞谷，紫雲尖嘴紅包穀，望謨麻山紅苞谷，紫雲黃苞谷等。 -
Through field investigation and soil fertility index analysis, causes and mechanism of fertility degradation of black soil in the songliao plain were explored
通過田間調查和土壤肥力指標分析，探討了松遼平原玉米帶黑土肥力退化的原因和機理。 -
Population index ? covers all fields of interest to demographers, including fertility, mortality, population size and growth, migration, muptiality and the family, and research methodology
人口索引向人口學家，包含死亡人數，人口數量和成長，遷移，結婚率和家庭的研究方法覆蓋所有的使人感興趣的領域。 -
At present there are more reports on soil erosion by experts from home and abroad, but most of these reports were about simulation and research based on a single factor. there are little reports on soil erosion on entire watershed, adopted comprehensive research measures according to the principle of ecological system, especially on soil erosion from the intensive farming system on slope lands, watersheds exploited for agroforestry industry, as well as appraisal reports on soil fertility index
目前國內外學者有關水土流失的報道很多，但大多數以單一因素和模擬試驗研究較多，而從生態系統角度出發，採用綜合方法，在小流域尺度上研究水土流失規律較少；對小流域坡耕地綜合農業措施水土保持效應和小流域綜合開發利用過程中水土流失規律研究以及侵蝕土壤肥力評價的研究則更少。 -
Based on analysis of soil physical, chemical and biological properties, soil properties and soil integrated fertility index ( iff ) of different successional series of subalpine coniferous in western sichuan were systematically studied. the results showed soil fertility degradation of subalpine coniferous forests was mainly related to decrease of soil organic matter
從土壤物理、化學和生物學性質角度出發，系統地研究了四川西部亞高山針葉林不同演替階段土壤性質和土壤綜合肥力指標值，結果表明：川西亞高山針葉林土壤性質主要受土壤有機質的影響，人工林地土壤肥力質量退化主要由於有機質的減少並導致相關土壤物理、化學和生物學性質惡化。 -
3 the author analyzes the productive and opening potential and forecasts the demands of some kinds landuse and draws some conclusions : ( l ) the main cause for low production and income is the shortness of water and the poor fertility of land ; ( 2 ) constructive land is not suitable for farming and should be used for economy construction, and this is the main path to keep the total number of plantation in balance. 4. according to the land use, the author discover the unsustainable factors and use synthetical index method to evaluate the sustainability of landuse and the results are these : ( l ) synthetical and monomial value increase gradually with the change of time and sustainable degree of landuse rises year by year ; ( 2 ) the artical compartmentalizes the sustainable landuse into four grades : prophase, primary period, basic period and sustainable period according to the synthesical value with 30 %, 60 % and 85 %
4根據酉陽縣土地資源利用現狀，在評價模型採用綜合指數法進行評價的基礎上，結合單指標多角度評價法，找出土地利用過程中存在的不可持續性因素，採用綜合指數法對酉陽縣土地資源進行可持續利用評價，結果顯示: （ l ）綜合評估值隨時間變化呈增加的趨勢，而且單項指標的評估值也逐漸提高，可持續利用度在逐年上升; （ 2 ）根據事物發展階段論，按綜合評估值為30 % 、 60 %及85 %將酉陽縣土地可持續利用劃分為可持續利用的前期階段、初期階段、基礎階段和持續階段等四個等級，從酉陽縣1980年、 1990年以及2000年總的土地可持續利用綜合評估值來看，酉陽縣到2000年土地利用管理仍處在可持續利用管理的初期階段，離土地可持續利用的目標還相差較遠。 -
Soil erosion and nutrient losses in jiangjiatang watershed in lanxi city in zhejiang province during exploitation was studied from 1993 - 2000 using adoptive research methods such as runoff plot, catchment area, and rare earth element tracer ( eu ), and the soil fertility index appraisal. the major conclusions are as follow : 1. the principle of water and soil losses together with nutrients and the forms in which they were lost were studied under different fanning systems in runoff plot
本研究選擇浙江省中部金衢盆地邊緣蘭溪市水土保持監督站蔣家塘小流域為研究試驗點，以協作單位蘭溪市水土保持監督站小流域開發試驗區為基礎，採用坡面徑流小區法、單源匯水試驗區出口實測法、穩定性核素- eu土芯示蹤法研究了2000年坡耕地不同農作措施水土流失規律及養分流失規律和小流域綜合開發過程中水土流失規律及養分流失規律，並對小流域侵蝕土壤的肥力現狀進行評價。 -
Spatial - temporal variation of integrated soil fertility quality index in the peri - urban suzhou
蘇州城市邊緣帶土壤綜合肥力質量時空特徵 -
The results obtained by the correlation, path and principal component analysis showed that soil urease and alkaline phosphatase activities could be as a comprehensive index of soil fertility, and their enzyme activities are affected by soil chemical properties and other enzymes
結果表明，土壤脲酶和?性磷酸酶活性可以作為土壤肥力的指標，且酶活性大小受到土壤化學性質和其它酶活性影響。
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