繁殖成本 的英文怎麼說
中文拼音 [fánzhíchéngběn]
繁殖成本
英文
reproductive cost-
Such rootstocks or cultivars were reproduced true to type by vegetative propagation.
這些鉆木和品種，通過無性繁殖長成和親本一樣的類型。Directed on the present situation and existing problems in boosting beef cattle industry based on the yellow cattle improvement in china, the review indicated that several relationships, such as integration of individual households and large scale cattle farms, integration of yellow cattle improvement, crossbreeding, breed conservation and utilization, integration of high grain diet intensified fattening and low grain diet economic fattening, should be handled properly ; and the requirements of profitable cattle industry for increasing reproductive survive rate, using hybrid vigor and improving the weight gain, the main factors affecting economic return of large scale cattle farms and the technology level improvement in cattle industry were duiscussed as well
本文就近來我國以黃牛改良為特點的肉牛業蓬勃發展現狀與存在問題，指出應處理好養牛經營形式千家萬戶與規模牛場相結合、黃牛肉用與肉役兼用相結合、黃牛改良選育與雜交、保種及利用相結合、高精料強度肥育與低精料適度育肥相結合等幾個問題；並就提高養牛經濟效益對提高繁殖成活率、充分利用雜種優勢、提高日增重的要求和影響規模牛場經濟效益的主要因素及如何提高養牛科技水平等問題提出探討。Are in accordance with the national regulations governing shrimp breeding and nutrients. its contents are based on akio kanazawas research report. akio kanazawa is the professor of marine resources, nutrient chemistry at kagoshima university, japan
維仁蝦片成分符合國家規定之蝦苗繁殖營養需求，其含量組成氨基酸需求比例根據日本鹿耳島大學海洋資源營養化學教授金澤昭夫研究報告，嗜口性良好。This investigation of the two species is mainly dealing with their morphological characters, population biology, pollination biology and molecular biology, based on the following methods such as section slides, sem, artificial pollination, rapd analysis and gravity glass slides. this study is intended to demonstrate the distribution patterns of the populations for the two species, the numerical and spatial characteristics of ecological difference, the biological characters of seeds, pollination mode and reproductive stratigies, and molecular genetics. in light of the results from this study, the reasons that resulted in the present dangerous situation for the two species were discussed, and the suggestions for protecting them were proposed
本研究以種群為單位，採用石蠟切片、掃描電鏡、重力玻片、人工授粉、 rapd分析等方法，對兩種植物的形態生物學、種群生物學、繁殖生物學和分子生物學等方面進行了詳細研究，以揭示它們的種群分佈類型及成因、種群生態環境差異的數量特徵和空間特徵、種子生物學特徵、傳粉和生殖策略以及種群分子遺傳特徵，進而探討兩物種瀕危的成因和機制，並針對性地提出了科學合理的保護對策和建議。The purpose of this subject deals with the biological characters of megalobrama skolkovii dybowsky according to the results of convey of nature resource in heilongjiang waters, capture and transportation of brood fish, outer appearance, study of countable and measurable characters and all inner system, analysis of muscle composition, study of chromosome, and discuss the classification status, and also carried out the artificial fertilization
本課題通過對黑龍江魴進行資源調查、親魚采捕和運輸、外部形態、外部可數及可量性狀和內部各系統的研究、肌肉成分的分析、染色體的研究等實驗，重點研究黑龍江魴的生物學特性，並對黑龍江魴的分類地位進行了探討，同時對黑龍江魴進行了人工繁殖。（ a species may be defined as a group of organisms of interbreeding natural populations that are reproductively isolated from other groups and that share in common gene pools
物種是生物界發展的連續性與間斷性統一的基本間斷形式；在有性生物物種呈現為統一的繁殖群體，由佔有一定空間，具有實際或潛在繁殖能力的種群所組成，而且與其他這樣的群體在生殖上是隔離的。During the breeding season, adults will return from their foraging grounds to their natal beaches for reproduction. at present, sham wan on lamma island is the only existing nesting site of green turtles in hong kong
在繁殖季節，成年海都會從數千公裡外的覓食地洄遊到出生地繁殖，而南丫島的深灣是本港唯一現存的綠海產卵地。From december, 2000 to octomber, 2001, 114 specimens of the adult fish in pelteobagrus vachelli, with body weight of 47. 60 - 165. 30g, were collected in 5 periods, i. e. the winter, spring, spawing, spent and autumn, in the jialing river
於2000年12月至2001年10月由嘉陵江收集野生瓦氏黃顙魚冬季、春季、繁殖期、繁殖后和秋季成魚標本114尾，體重變幅為47 . 60 - 165 . 30g 。Length, diameter, density, fresh weight, dry weight, water content, osmotic potential and element concentrations ( ca, mg, na, k, cl ) were determined for each. seedling of b. gymnorrhiza and a. corniculatum were cultured for 60 days on various salinity of seawater ( 0, 5, 10, 15, 20, 30, 40, 50 ) in green house. samples were taken at 3, 7, 11, 15, 22, 30, 45 and 60 days after planting, separated into root, hypocotyl, stem and leaf
本文研究了福建九龍江口木欖和桐花樹胎生繁殖體從果實形成到發育成熟過程中形態、生物量、含水量、胚軸密度、滲透勢、五種主要礦質元素（ ca 、 mg 、 na 、 k 、 cl ）等的變化和溫室內人工鹽度梯度栽培下木欖和桐花樹成熟繁殖體長成幼苗（ 0 60d ）過程中形態、生物量、含水量、滲透勢、光合蒸騰特性、五種主要礦質元素（ ca 、 mg 、 na 、 k 、 cl ）等的變化；並且在野外自然條件下，跟蹤調查不同灘塗位置下秋茄成熟繁殖體定居成活、自然死亡狀況以及測定幼苗生長過程中（ 1年）形態、生物量、含水量、光合蒸騰特性等的變化。So far, a male contraceptive pill has proved difficult to produce because of a basic biological fact of human reproduction : a man naturally produces about 150 million sperm each day of his adult life
人類繁殖有一個基本的生理現象，一個成年男性每天能產生1億5千萬個精子，所以迄今，人們很難生產出男性避孕藥。Qiupuriver mandarinfish is a local breed under selecting and a famous brand of chizhou city, anhui province, which has a big reproductive population and culturing on a large scale ; it also possesses of sound features such as high growth rate and strong resistance. but none study has been carried on its genetic basis before. study on the genetic variation of qiupuriver mandarinfish, changjiang mandarinfish and wanfuhu mandarinfish with isozyme and rapd markers has important content, at the same time, it will bring new material to selection and application of the qiupuriver mandarinfish
秋浦河鱖魚是我省選育中的一個地方品種，具有生長快、抗逆性強等優良特性，已形成一定的繁殖與養殖規模，並成為我省池州市重點推廣的名牌產品；但對其遺傳基礎的研究尚屬空白，本試驗對秋浦河鱖魚、長江鱖魚和萬佛湖鱖魚進行同工酶和rapd分析，以便為秋浦河鱖魚的選育與推廣提供基礎資料。For several decades, many scientists have been working hard at reducing production cost, simplifying the industrial process, increasing the coefficient of propagation, but as for the rapid propagation of most economic plants, people still can not transform the technique of tissue culture into great productivity in large scale
這一點更像組織培養試管快繁的優點。越到後面的代數，繁殖的種質資源材料越多，繁殖的速度越快，成本越低。快繁苗木隨著按幾何級數高效增殖的同時，快繁生產成本卻不斷得到稀釋。The paper overviews the formation and characteristics of the technique of rapid propagation of free virus in plant tissue culture, and its application in flower, wood, fruit tree, vegetable. . etc., and introduces the main technical link to produce the seedling, including the function and choice of media, the principle and need of donor plants, tame method and transplant request of plant, productive plan of seedling and budge means of cost
摘要綜述了植物離體快速繁殖技術和脫毒技術的形成、特點及其在花卉、林木、果樹、蔬菜等方面的應用，闡述了利用快繁與脫毒技術生產種苗的主要技術環節，包括培養基的作用和選配要點、外植體選取的原則和快繁與脫毒的不同要求、試管苗馴化的方法與移栽要求、種苗生產計劃的制定與成本預算方法。The results of the project of efficient cultivation technique for improved tea variety was reported. the advanced experience was obtained in the studying and popularizing of the cutting propagation technique, including the variety arranging, the grafting to change variety in the old tea garden ， two concave deep cultivation technique ， the organic fertilizer optimum manuring technique
本文闡述了茶葉良種先進高效栽培技術項目的完成情況，以及在研究和推廣扦插繁殖技術、品種優化技術、老茶園嫁接換種、雙條凹溝深栽、優化有機肥施用技術中取得的先進經驗。With many efforts, the scientists of china have succeeded in researching the plant rapid propagation of many kinds, yet only about ten kinds of economic plants have been industrialized and spread over an extensive area, though in a low speed
而針葉樹種有許多植物品種進行組織培養難度很大，基本上不能大規模生產。常規拖插又存在著生根慢、成活率低。致使這些品種的苗木一直在用用種子繁殖，後代性狀變異非常大。This thesis suggests a process considered minimizes the population size as similar individuals occur in the fitter members of the population, which helps reduce the execution times for ga by removing the redundancy associated with the saturation effect found in the later generation. this thesis uses a method that adds dynamic penalty terms to the fitness function according to the optimal degree of solutions, so as to create a gradient toward a feasible suboptimal or even optimal solutions. on the basis of the difference of the biggest and the smallest of fitness of individual, modifying the fitness function in order to convergence is a satisfaction
動態調節種群大小，去掉遺傳演算法在迭代後期搜索產生的過多相似個體，達到減少計算時間的目的；按照解的優劣程度給適應度函數增加一個在ga搜索過程中動態改變的可變罰函數，給搜索最優解創造一個梯度，使遺傳演算法收斂到可行的較優解或最優解；根據適應度值最大和最小個體的差修正適應度函數，使適應度函數值適中不容易造成收斂太快、局部收斂或根本不收斂而變成隨機搜索；為了避免「近親繁殖」採用競爭擇優的交叉操作；利用并行遺傳演算法的思想，提出一種自適應多子種群進化策略；提出人口汰新政策來解決類似甚至相同的個體的情況發生。On the basis of the analysis on the yangtze vole ' s disaster history and condition in dongting lake area, the influence of the lake beach ' s environmental evolution on the vole disaster is studicd in this paper. the rise of low - middle - level beach area causes the vole ' s population explosion, the reduction of high - level beach area forces the voles into the farmland during the flood season, and the emergence period ' s continual increase extends the vole ' s habitat areas and forces them to migrate into the farmland. the discarded dike provides a rest place halfway for the voles, which escape the flood, and the natural enemies of the voles, which are a natural barrier against the vole ' s population expansion, decreases. according to this study, the conclusions are put for ward as follows : after three - gorge project ' s construction it will produce great influences on the beach evolution in dongting lake area, leading to the changes of the vole ' s ecological environment situation and resulting in the vole ' s population changes which deserves attention
在分析洞庭湖區東方田鼠暴發成災史及災情的基礎上，研究了洞庭湖區洲灘演變對東方田鼠暴發成災的影響.研究認為，中低位洲灘出露面積不斷增大使東方田鼠種群迅速膨脹，高位洲灘出露面積減小造成汛期東方田鼠大量向垸內農田遷移;湖區洲灘冬春季連續出露天數增加延長了東方田鼠的繁殖期;汛期洪峰水位增高，洲灘大面積淹沒迫使東方田鼠大量遷向垸內;湖內廢棄湖堤為東方田鼠逃避洪水提供了中途休養之地;洲灘地抑制東方田鼠種群膨脹的天敵數量已大大減少.據此，本文指出，三峽工程建成后將對洞庭湖區洲灘演變產生重大影響，因而將改變東方田鼠種群生態環境條件，引起種群動態變化，值得注意There were total 4 rings in hkcls 8th champonship cat show and silencedryad honey bee has made it to the best cat in champonship of 1st and 3rd ring. besides, he won the title of the best of breed division and got his championship title in this show, and also become
本貓場繁殖的silencedryadhoneybee在第八屆冠軍貓展（香港貓迷會舉辦）的ring1和ring3分別勇奪成貓組（全貓種）的bestcat （第一名） ，同時奪得全場最佳品種（ bestofbreeddivision ）和oneshowchampion ，更是全場Through extensive investigation, the species and cooking methods of flower - edible plants in wenzhou were catalogued. for three species which have immediate utilization value, propagation and cultivation techniques were developed, and the nutritional quality of edible parts was evaluated for further utilization. this is the first report of nutrient content analysis of broom ( caragana sinica ) flower
本研究對溫州市食用花卉資源進行了三年的調查，基本上摸清了溫州市食用花卉資源的種類和食用方法：對3個近期具有開發利用價值的品種進行了種苗繁殖與栽培技術的研究，提出了一套適宜的種苗繁殖與栽培技術：對其可食部分進行了營養成分的測定分析與評價，首次報道了金雀花營養成分分析結果，為研製食用花卉食品，大面積開發利用這些食用花卉資源提供了科學依據。The unusually large numbers of black - winged stilts let alone the first confirmed successful breeding attempt at mai po this year, is thought to be due to the creation of a number of rain - fed freshwater habitats in recent years, and which the birds appear to prefer
本年飛抵保護區的黑翅長腳鷸的數目非常多，而且更首次在區內成功繁殖，可能是近在年保護區內辟出的數個蓄雨水淡水生境，吸引到黑翅長腳鷸光臨。分享友人