natural fertility 中文意思是什麼
natural fertility
解釋
自然肥力-
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。 -
In order to solve this problem, we find a kind of herbages plant - sabaigrass ( eulaliopsis binata ) which not only can accommodate the badly environment of purple soil but also have excellent water and soil conservation effect and good economic benefit. this study adopt quantitative and qualitative methods, through comparative study of four different utilization types : sabaigrass treatment, grass tree solid plating treatment ( planting sabaigrass under fruit trees treatment ), bare land treatment, natural wild grassland treatment, study water and soil conservation effect, soil water condition, soil constructors condition, soil fertility condition and soil surface temperature, then evaluated the water and soil conservation effect of plating sabaigrass in purple soil bare sloping field and probed into water and soil conservation mechanism. the main results are as follows : 1
本研究針對湖南省衡邵盆地紫色巖地區日益惡劣的生態環境，從紫色土荒坡地水土流失治理入手，在尋求出既適應紫色土荒坡地惡劣環境又有良好水土保持作用和一定經濟效應的作物? ?龍須草的基礎上，用定性和定量相結合的方法，以「龍須草純種」 、 「龍須草與果樹立體種植」 （簡稱林草立體種植，下同） 、 「空曠地」 、 「自然野生雜草地」四種不同的土地利用方式進行對比研究，從水土保持效應、土壤水文狀況、土壤結構、土壤肥力狀況、地表溫度狀況等方面分析、評價紫色土荒坡地種植龍須草防治水土流失的效應，並對其機理進行了初步探討，主要研究結果如下： 1 -
Purple soil classified as regosols in fao soil taxonomy and pup - cambols in china soil taxonomy, is one of well known soil types with the particularities such as weathering easily, high natural fertility, etc., and feeding population of 500 / km2. however, it often meets the water disasters ( sporadic flooding and serious seasonal drought )
摘要紫色土是世界上一種特殊的土類，集中分佈於四川盆地，以其易成土性和富鹽基性（自然肥力高）養育著500人以上平方公里的人口而著稱於世，但是它分佈的區域存在嚴重的季節性乾旱和時有發生的洪災等水問題。 -
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。 -
By the listener a limitation of fertility inasmuch as marriage had been celebrated 1 calendar month after the 18th anniversary of her birth 8 september 1870, viz. 8 october, and consummated on the same date with female issue born 15 june 1889, having been anticipatorily consummated on the 10 september of the same year and complete carnal intercourse, with ejaculation of semen within the natural female organ, having last taken place 5 weeks previous, viz
因為結婚儀式是她過了十八歲生日一八七0年九月八日一個月之後，即十月八日舉行的，當天同衾其實同年九月十日二人己提前發生完全的肉體關系，包括往女性天然器官內射精406一八八九年六月十五日生下一女。 -
In the meanwhile, the best community that was picked out from natural deciduous broad - leaved forest was taken as contrast. and the hight, dominance, soil fertility, coverage, composition and biomass of the community were used as community characteristics parameters to comprehensively evaluate the restored degree of communities at different restoration stages
同時，在天然闊葉落葉林中選取一個最佳群落作為參照，運用群落高度、顯著度、土壤肥力、蓋度、組成結構和生物量6個指標為群落特徵參數，對各個階段群落恢復的程度進行了綜合的評價。 -
Obviously, natural soil fertility conditions affect the yield potential but in general, well drained soils with medium to high fertility have the potential to produce high yields
顯然，自然土壤肥力狀況影響產量潛勢，排水良好的中上等肥力土壤最能獲得高產。 -
Degeneration problems of karst soil fertility are mostly soil leanness, vegetation reduction, and natural environment erosion and rock desert
巖溶土壤肥力退化問題主要表現為土壤貧瘠、植被減少、水土流失和土地石漠化。 -
Higher yields obtained take up more nutrients which have to be replaced to sustain high yields even in soils with high natural fertility
較高的產量需要更多的養分來補充，即使在自然肥力高的土壤上也是一樣。 -
Certified organic cotton is cotton grown in fields where the use of pesticides have been discontinued for at least 3 years and where rigorous controls help rebuild the soil ' s natural fertility
經過認證的有機棉花指的是在連續3年未施殺蟲劑並在嚴格控制下重新獲得自然肥力的土壤中種植的棉花。 -
Effect of plant density and fertilizer application on plantain yield in two soils from colombia with different natural fertility is shown ( table 2 )
表2說明了在哥倫比亞的兩種不同天然肥力土壤上種植密度及肥料用量對大蕉產量的影響。 -
In many european countries ( the soil of which possesses the same natural fertility as that of england ) the yield at present does not exceed fourfold
有許多歐洲國家，它們土地的肥沃並不亞于英國，但農作物每英畝產量的增加還不到四倍。 -
As is well known, soil quality changes over time due to natural processes and impacts of human activities, especially the impacts of farmer ' s land - cultivation activities on soil fertility have been deepening
摘要自然過程和人類活動是影響土壤質量演變的兩大因素，而人們的農業生產行為對農田土壤肥力的影響日益加深。 -
It have the natural ecosystem ' s ordinary characters, the same time receive society, fertility, production relations and the relating building up on it
它既具有一般自然生態系統的特徵，同時又受社會，生產力，生產關系以及與之相聯系的上層建築所制約。
分享友人