The results indicate that : 1. the main physical and chemical characteristics vary regularly : with rising of the altitude, there is a transition from silt > sand > clay to sand > silt > clay in the mechanical composition ; the argic horizon emerges below the altitude of 1600 meters ; the content of organic matter is enrichment, the content of organic carbon of epipedon is higher than 20 g / kg, while the content of organic carbon increases with increasing of altitude, and in the altitude of 3500 - 3700meters, the soils under the meadow have the maximum content organic carbon ; the soils appear acid - slightly acid reaction, the ph decreases appreciably and acid strengthen with increasing of altitude ; the soils higher than the altitude of 2500 meters are base unsaturated, indicating the soil leaching is strong, the ph and bs are distinct plus correlated ; the contents of sio2, al2o3, and fe2o3 of the soil body and clay are all relatively stabilization ; in the soil body, the content of sio2 is much high and cao is very little, the total contents of sio2, a12o3 and fe2o3 occupy 92 % of the mineral parts, the sequence of mineral elements is : sio2 > al2o3 > fe2o3 > k2o > mgo > cao > tio2 > mno
研究結果表明: 1太白山南坡
土壤的主要理化性質隨海拔高度的上升呈有規律的變化:隨海拔高度上升,機械組成由粉粒砂粒粘粒逐漸過渡到砂粒粉粒粘粒,海拔1600m以下出現粘化層;
土壤有機質豐富,表層有機碳含量一般在20g kg以上,有機碳含量隨海拔高度升高而相應增加,海拔3500 3700m的灌叢
草甸植被下有機碳含量最高;
土壤呈酸性或微酸性,並隨海拔上升, ph值略微降低,酸性增強,海拔2700m以上的
土壤多呈鹽基不飽和狀態,表明
土壤淋溶作用較強, ph值和鹽基飽和度呈極顯著正相關;
土體與粘粒中的sio _ 2 、 al _ 2o _ 3 、 fe _ 2o _ 3含量相對比較穩定,
土體中sio _ 2含量較高, cao含量較少, sio _ 2 、 al _ 2o _ 3和fe _ 2o _ 3含量之和約占
土壤礦質部分的92 ,礦質元素含量的順序依次為: sio _ 2 al _ 2o _ 3 fe _ 2o _ 3 k _ 2o mgo cao tio _ 2 mno 。
The rhizosphere microflora dynamics of bacteria, actinomyces, fungi and four bacterial physiological groups of kentucky bluegrass under different quality of illumination were studied by adopting selective culture medium to explain scientifically response regular of this grass to different illumination condition
摘要研究了
草地早熟禾在不同光照條件下其根際與非根際細菌、真菌、放線菌以及氨化細菌、硝化細菌、好氣性纖維素分解菌、固氮菌生理類群的區系動態變化,擬從根際
土壤微生物數量變化方面來闡述
草地早熟禾對不同光照條件的響應規律。
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。
One of the agronomic crops that was used to determine the effects of soil heating was grass.
牧
草是經常用來測定
土壤加熱影響的一種農作物。
A. splendens is a pioneer plant in saline - alkali soil ameliortion
摘要芨芨
草是鹽堿化
土地改良中的先鋒
草種。
Effect of the different measures on the improvement of alkaline soil in kangping county
不同措施對康平
草甸堿
土改良效果的研究
Mountains and ridges of rough lava are furrowed with narrow valleys of alkaline soil sheltering a few grasses and shrubs
在熔巖形成的山脈和山脊間,狹窄山谷內的鹼性
土壤上零星散布著
草叢和灌木。
Characteristic of moisture and salt dynamic in saline - alkalized grassland of songnen plain during thawing period
松嫩平原鹽堿化
草地消融期
土壤水鹽運移特徵
But so far, there have not report about forest soil microbe and soil enzymatic activity in westen sichuan. the study ' s object is bitch forest. spruce forest, fir forest, chrysanthemum alp, willow community and two couch grass, so the research of the soil microorganisma, soil enzymatic activity in the subalpine coniferous forests in western sichuan is significant to china. the result shows that : 1. in the soil, the relativity of the soil microbial puantity is very prominence, the relation with the quantity of the soil microorganism is that : bacillus > actinomyceto > fungi ; the amount of the microorganism of physiological group sequence ranging from high to low is : aminate > bacteriumazotobacter > denitrify bacterium > nitrobacteria > cellulose decomposing bacteria. under the different vegetable community, the microbial quantity is that : s5 > s7 > s6 > s1 > s2 > s4 > s3
其中,各群落中
土壤微生物總數以白樺純林( s5 )群落最多,每克干
土中的含菌量達66 . 13 10 ~ 6個;其次是冷杉針葉林( s7 )群落,每克干
土中的含菌量達43 . 41 10 ~ 6個:第三是雲杉針葉林( s6 )群落,每克干
土中的含菌量達42 . 85 10 ~ 6個;第四是繡線菊-茅
草群落( s1 ) ,每克干
土中的含菌量達33 . 83 10 ~ 6個;第五是高山柳群落( s2 ) 、茅
草( s4 )群落,每克干
土中的含菌量分別為33 . 33 10 ~ 6個和33 . 08 10 ~ 6個;第六是茅
草群落( s3 ) ,
土壤微生物數量最少每克干
土中的含菌量僅為23 . 12 10 ~ 6個。
In the surface layer, the dominant microbes are usually denitrifying bacteria, followed by anaerobic nitrogen fixing, ammonifying and nitrifying bacteria
土壤氮素代謝微生物高寒
草甸
土壤氮素代謝微生物的數量及活性在
Vegetation dynamics and soil characteristics of different period abandoned land was conducted in typical steppe at xilinguole league and meadow steppe at hulunbeier league, inner mongolia. the results showed : the function community of annual plants, perennial rhizornatous grasses and perennial rosette grasses were appeared at different succession stage of abandoned land in typical steppe and meadow steppe
本試驗分別在內蒙古錫林郭勒盟典型
草原帶和呼倫貝爾盟
草甸
草原帶對不同撂荒年限的撂荒地植被動態及
土壤特性進行了研究,目的是探討
草原區撂荒地植被演替的規律,為撂荒地植被的重建提供理論依據。
How many a poor immortal soul have i met well - nigh crushed and smothered under its load, creeping down the road of life, pushing before it a barn seventy - five feet by forty, its augean stables never cleansed, and one hundred acres of land, tillage, mowing, pasture, and woodlot
我曾遇見過多少個可憐的、永生的靈魂啊,幾乎被壓死在生命的負擔下面,他們無法呼吸,他們在生命道上爬動,推動他們前面的一個七十五英尺長,四十英尺寬的大谷倉,一個從未打掃過的奧吉亞斯的牛圈,還要推動上百英畝
土地,鋤地、芟
草,還要放牧和護林!
The soothing benefits of lavender and rosemary improve circulation to the scalp and rich babassu oil adds a noticeable sparkling glow to your hair
薰衣
草油、迷迭香油增加頭皮血液循環。巴西棕油為南美洲
土著世代沿用作為天然的潤膚劑。
Whittled by a half million years of wind and rain, the haunting claystone hills and buttes of badlands national park rise above the surrounding sea of grasslands
歷經了50萬年的風吹雨打后,惡地國家公園的黏
土巖丘陵與孤山矗立在一片
草原之海中。
Not to inherit by right of primogeniture, gavelkind or borough english, or possess in perpetuity an extensive demesne of a sufficient number of acres, roods and perches, statute land measure valuation 42, of grazing turbary surrounding a baronial hall with gatelodge and carriage drive nor, on the other hand, a terracehouse or semidetached villa, described as rus in urbe or qui si sana, but to purchase by private treaty in fee simple a thatched bungalowshaped 2 storey dwellinghouse of southerly aspect, surmounted by vane and lightning conductor, connected with the earth, with porch covered by parasitic plants ivy or virginia creeper, halldoor, olive green, with smart carriage finish and neat doorbrasses, stucco front with gilt tracery at eaves and gable, rising, if possible, upon a gentle eminence with agreeable prospect from balcony with stone pillar parapet over unoccupied and unoccupyable interjacent pastures and standing in 5 or 6 acres of its own ground, at such a distance from the nearest public thoroughfare as to render its houselights visible at night above and through a quickset hornbeam hedge of topiary cutting, situate at a given point not less than 1 statute mile from the periphery of the metropolis, within a time limit of not more than 5 minutes from tram or train line e. g.,
他並不想根據長子繼承製男子平分繼承製或末子繼承製237 ,把那幢有著門房和馬車道的男爵宅邪及其周圍那一大片遼闊的英畝路得和平方桿238法定
土地面積單位,估價為四十二英鎊239的泥炭質牧場地,或者那座被描述為「都會中的田園240 」或「健康莊242 」的有陽臺的房子或一側與鄰屋相接的別墅,繼承下來並永久佔有。他只巴望根據私人合同購買一所繼承人身分不受限制的不動產:要坐北朝南的一座
草屋頂有涼臺的雙層住宅,房頂上裝起風向標以及與地面相接的避雷針,門廊上要爬滿寄生植物常春藤或五葉地錦,橄欖綠色的正門最後一道工序漆得漂漂亮亮,賽得過馬車。門上有著精巧的黃銅裝飾。
Aromatic types of tobacco are produced in turkey and other mid-eastern european countries bordering the black sea.
香料型煙
草種植在
土耳其和黑海沿岸的其他中東歐洲國家。
Gley soils are typical of tundra, meadows, and boggy areas
該種
土壤是苔原、
草地以及沼地所特有的。
Gradually, with the more and more transpiration of the vegetation, and with the reduction of the deep soil moisture, in the end, a kind of balance of soil moisture will appeared and be kept for ever between the precipitation and the transpiration of vegetation, and the manual sand - fixing vegetation will be transformed consequently into its natural climax stage completely, in which the dominant plant is leymus secalimus, and in which the plant species richness is not too low, but the plant species evenness is the lowest
設置機械沙障和生物沙障的初期,植物的物種豐富度、物種均勻度會有一個暫時的提高;但是在人工固沙植被的發育盛期,物種豐富度會降低;隨植物群落蒸騰耗水量的不斷增大,人工植被不斷地衰退,最後發展到賴草土壤頂極群落,此時的物種豐富度並不低,但是物種均勻度很低。