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。
Poor drainage causes deficient soil aeration and death of the roots.
排水不良能減低
土壤的透氣性,使
根死亡。
Erect aerial roots arising from cable roots to facilitate gaseous exchange of the roots of some mangrove species ( e. g
是一種由纜狀
根生長出來的直立氣
根,用來幫助某些紅樹品種(如白骨壤)的
根部,在浸滿水的泥
土裡進行氣體交換。
Pneumatophore ( aerophore ; breathing root ) a specialized negatively geotropic root produced by certain aquatic vascular plants ( especially trees such as mangroves, e. g
呼吸
根:指由某種水生維管植物產生的特化的負向地性
根(尤其如紅樹,如海桑屬) ,在
土壤之上生長良好。
Such complexes might have affinity for detrimental inorganic oxyanions such as arsenate, a common toxic contaminant in soils. the purpose of this study is to investigate the influence of environmental conditions on the adsorption of arsenate on fe - oxyhydroxide - monlmorillonte complexes, which is significant to agrology, geochemistry and environmental science
本研究即以南方的
土壤環境條件為參考,模擬在ph = 5時的酸性氧化條件下,
土壤中低聚合羥基鐵?蒙脫石復合體的形成、物化性特徵及其吸附砷酸
根陰離子的行為。
Based on the actual situation in the upper reaches of minjiang river, the main assessment factors such as strata structure, landform, vegetation covering eco - environment, surface water, ground water, agrotype and geological hazard are selected in this paper
本文
根據岷江上游的實際情況選取巖性構造、地形地貌、植被覆蓋生態區、地表水、地下水、
土壤類型及地質災害等因素作為評價因子。
Your sturdy trunk progressively increases your own annual rings ; yet your root at your feel would never forget the native land
你壯實的莖,遞增著自己的年輪;腳下的
根,忘不了故
土。
The construction of land use status information system improves the accuracy and the trends of times of land use information, it automatically stores, manages, researches, inquires, counts, analyzes, renews and defends land use status graph which is digital, solves the problem of the renewal of land use status graph and data. it provides not only modern technology means for everyday professional work in county level land management department, but also basic data and scientific basis for land use renewable investigation, dynamic monitoring, land use totality planning. on the other hand, it lays a foundation for the establishment of cropland transform system, land exploitation and readjustment, approvable management system of construction project used land, management system of rural land register
土地利用現狀信息系統的建設,提高了
土地利用現狀信息的準確性和現勢性,實現了對
土地利用現狀圖件的存儲、管理、檢索、查詢、統計、分析、變更、維護的數字化和自動化,從
根本上解決了
土地利用現狀圖及數據的更新問題,不僅為縣級
土地管理部門的日常業務工作提供了現代化的技術手段,而且為
土地利用變更調查、動態監測、
土地利用總體規劃提供了基礎數據和科學依據,為農地轉用制度、
土地開發整理、建設項目用地審批管理制度及農村地籍管理制度的建立莫定了現代化基礎,同時也可為
土地利用動態監測、
土地利用規劃、建設用地的審批和管理提供技術服務。
Based on the analysis of mechanism for joint region, the " frame - wall " and " aslope compression stub column " mechanical models and yielding patterns of core zone of the joints are set up. the shear load - carrying formulation for joint core zone is also given in terms of plastic ultimate analysis. and then, the comparisons between the formulas given in this paper and that of chinese design code ( draft ) and nonlinear fem as well are presented
對節點核心區的抗剪,通過受力機理的分析,建立了鋼「框架剪力墻」加混凝
土「斜壓短受力體系及其屈服機制,
根據塑性極限分析,給出了節點核心區抗剪承載力計算的迭加公式, 《規程》公式和非線性有限元近似模擬分析結果進行了比較。
An auxin increases the growth in length of a plant cell, thus causing the curving of a stem, or roof, in phototropism and geotropism.
植物生長素能加快植物細胞長勢,因此使莖彎曲向著陽光,或使
根深扎入
土。
And plant organs ( roots, stems and leaves from rice, cotton, maize, tobacco le aves and some vegetables ) are diluted with sterile water ( serial dilution method ). when the samples are diluted to 10 - 4, 10 - 5, 10 - 6 times, o. 5ml dilute solution are put into selective medium and are cultived for 3 ~ 5 days and observed wheather the transparent zones are produced
稻田
土、桔園
土、池塘底泥、水產養殖場的泥
土等)或植物器官(水稻、棉花、玉米、煙葉及一些蔬菜的
根、莖、葉)用無菌水稀釋(梯度稀釋法人在稀釋倍數為10葉、 10刁、 10 、時分別取0
Legume rhizospheres stimulate more growth of rhizobia than do the rhizospheres of nonlegumes or soil apart from the roots.
豆科植物的
根際比非豆科植物的
根際或離
根土壤更能刺激
根瘤菌的生長。
B ) soil nails support : according the geological condition, meeting the need of one nail and whole soil nails, the thesis confirm the length and number of soil nails
B )
土釘支護系列:
根據工程地質條件,滿足了體系穩定性和單
根土釘極限承載力的條件下,確定了
土釘的長度和
根數。
Once aimed at enhancing national feeling and a return to the roots of chinese culture, the cultural movement was unexpectedly abandoned and even expressed an opposition to chinese culture
主要是指當時原來以呼喚民族感情回歸中國
根土文化為宗旨的運動,最後也可能會竟然轉而成為背棄或對抗中國文化的行為。
It analyzes the hydrologic effect from the aspects of rainfall interception of plants, splash erosion reduction and surface runoff control, analyzes the mechanical effect from the aspects of tensile strength of single root of plant, root - soil interaction, root - soil composite and slope stability and finally approaches to the future development orientation of slope protection by vegetation
從植物的截留降水、削弱濺蝕和抑制地表徑流等方面分析了植被護坡的水文效應,並從植物單
根抗拉強度、
根土相互作用、
根土復合體及邊坡穩定分析等方面分析了植物護坡的力學效應,最後探討了植被護坡的發展方向。
24 samples including matsutake basidiocarps and different origin isolates were analyzed with rapd fingerprinting comparison using 17 arbitrary decamer nucleotide primers. the results showed that all slow - growing mycelia isolated from lamellae have the same dna fingerprinting
試驗還對松茸菌
根、帶菌絲
土壤進行了分離,結果很容易獲得各種快生型的絲狀真菌,因此認為菌
根、
土壤並不適合分離鬆口蘑菌絲體。
While considerable work has been done for the effects on crops jess work was conducted for the effects on soil quality, especially soil environment in rhizosphere. the objectives of this study were, therefor to discribe the characteristics and effects of applying re on soil mineral nutrition with a soil culture experiment as well as the effects of re on translocation and uptake of mineral ions in rhizosphere with a simulating rhizosphere experiment
本研究以油菜和水稻為供試材料,通過
土壤培養試驗和
根際模擬試驗並結合室內分析研究稀
土對
土壤礦質營養的作用及對
根際礦質離子遷移、吸收的影響,以期從
根? ?
土系統出發,為稀
土農用增產機理和環境風險性評價提供理論參考依據。
The coherence force c and the inner friction angle of composite increase 115 % - 205 % and 11 % ~ 15 % respectively more than that of no rootstalk soil. 3 the mechanism of dealing with corn rootstalks and eight kinds of blades for experiment in the soil bin have been developed in order to investigating the performance of dealing with rootstalks
土壤-根茬復合體其抗剪強度與剪切面上的法向壓應力成正比,復合體土壤凝聚力c比無根土壤增加115 205 ;內摩擦角增加11 15 。