crop source 中文意思是什麼

crop source 解釋
作物資源
  • crop : n 1 農作物，莊稼；收獲；收成；〈the crops〉 一季的收獲量，產量。2 （同一時期出現的人物等）一批，...
  • source : n 1 源頭，水源，源泉。2 根源，本源；來源。3 原因；出處；原始資料。4 提供消息的人。5 血統。vt 〈美...
  1. Two years age, africa lost more than half its cassava crop - - a key source of calories - - to the mosaic virus

    兩年前，花葉病毒使非洲損失了超過一半的木薯，而這種作物是當地人的主要食物。
  2. Sunflower is an important oil crop in semi ? arid area and arid areas of north china and north - west china. it is also a major vegetable oil source of the residents live in these areas

    向日葵是我國華北、西北、東北半乾旱、乾旱地區種植的主要油料作物，也是這些地區居民食用植物油的主要來源。
  3. Rubber tree ( hevea brasiliensis ) is an important economic woody - crop in tropical areas. its latex is the unique source of crude rubber used in current industry. because of its special and important use, the rubber tree has been extensively planted in tropical areas. increase production is always the main target in rubber tree cultivation. since the ethrel was applied in increasing latex production in 1968 for the first time as a chemical stimulant, not only the latex production had been increased largely, but also a new set of rubber tapping system had been established, leading to a series of economic benefit. owing to ethrel " s extensive application, its side effects had been found more and more obviously, such as tapping dry, speeding up senescence, shortening the life span of rubber tree etc. in order to overcome the side effects and increase production more availably, for a long time, people had carried out lots of research work on cell level, membrane level, physiology and biochemistry of laticifer contents. but the mech anism why ethrel increased latex production was not yet understood completely. this study had cloned the ethylene receptor gene ( efrl ) from rubber tree, and researched the relationship between etrl expression in laticifers and ethrel stimulation on transcription level and protein translation level. the results were as follows : 1

    但是，由於乙烯利應用的普及，乙烯利刺激割膠引起橡膠樹發生死皮病及加速膠樹衰老，縮短膠樹壽命等副作用也越來越明顯。為了克服這些副作用，使乙烯利能更有效地刺激增產，長期以來，人們在細胞水平、膜水平和乳管細胞內含物的生理生化層面上進行了大量的研究，但仍未完全了解乙烯對膠樹的作用機制。本研究從分子水平入手，克隆橡膠樹的乙烯受體基因（ etr1 ） ，並在轉錄水平和蛋白質翻譯水平上研究etr1基因在乳管細胞中的表達及與乙烯刺激的關系，取得了以下結果： 1
  4. In the agricultural total output value internal structure, output value of forestry and animal husbandry occupy 80 % of it, and realize fully exploitation and utilization of the superiority environment factors ; in the crop planting output value internal structure, the economical crop output value occupy 51. 18 % of it, and give prominence to develo pment of the regional superiority ( resource superiority ) and characteristic agriculture ( chinese medicinal materials etc ) ; in the animal husbandry output value internal structure, the grass - eating animals output value ( including rabbit output value ) occupy 84. 55 % of it, thereinto, the rabbit output value occupy 66. 2 % of it, and realize operation of large scale ; enhance meat, egg and milk per person ( increase proportion of beef and mutton, reduce proportion of pig ), and reduce grain per person and oil plants per person, and enhance forest - coverage rate, source of manure index etc, and enhance ecological benefit

    到2020年時農業總產值達到了2000年的2 . 75倍，人均產值達2753 . 42元，是2000年的2 . 39倍，總產值內部，林業和牧業產值佔80 ，充分實現了優勢環境因子的開發利用；種植業內部，經濟作物產值佔51 . 18 ，突出了區域優勢（資源優勢）和特色農業（中藥材等）的發展；牧業內部，草食畜產值（含兔）佔84 . 55 ，其中兔產值占牧業產值的66 . 2 ，實現了規模化經營；提高了人均肉蛋奶佔有量（其中增加牛羊肉比重，降低了豬肉比重） ，降低了人均糧食和油料佔有量，同時還提高了森林覆蓋率、肥源指數等指標，從而提高了生態效益。
  5. Eurasian perennial herb having pale pink flowers and curved pods ; naturalized in britain and north america grasslands on calcareous soils ; important forage crop and source of honey in britain

    多年生歐亞草，花淺粉色，彎曲豆莢；已經引入英國和北美鈣質土壤草原；在英國是重要的飼料作物和蜜源植物。
  6. This research was conducted to : ( 1 ) understand the characteristic and pattern of trickle source infiltration, ( 2 ) study mulched crop evapotraspiration for cotton and corn in a arid climate sandy loam soils. according to the researches of the dissertation, the main results are as follows : ( 1 ) the shape of wetted soil volume is influenced by soil texture, discharge rate and the total volume of applied water in case of trickle source infiltration

    本文以粘壤土為研究對象，對微源入滲特性規律進行了系統的室內試驗研究，並且對膜下滴灌大田作物棉花和玉米的需水規律進行了野外試驗，得到了以下幾點結論： （ 1 ）地表微源入滲土壤濕潤體的形狀受到土壤質地、供水強度和灌水時間的影響，一般為半個橢球體。
  7. This paper introduce, on the basis of consulting a lot of data, during to the question of shortage of energy source in the world and adjusting to structure of energy source under the new condition of 21 century and the question of tar during the crop stacks - based biomass gasification

    本課題是在查閱大量資料的基礎上，針對世界范圍內能源缺乏問題和21世紀新形勢下的能源結構調整問題以及生物質秸稈氣化過程中產生的焦油等問題而提出的。通過查詢可知目前國內外還沒有人涉足這方面的研究。
  8. Firstly, this dissertation estimated the size of carbon source ; sink and net carbon sink of farmland ecosystems in china costal regions ( including ten provinces ) with statistic data from 1981 to 2001, which include data of crop yield and agricultural consumptions. then analyzed the temporal - spatial differences of carbon source, sink and net carbon sink of china costal farmland ecosystems. secondly, estimated npp ( net primary productivity ) of farmland ecosystems in china costal regions with per month noaa - avhrr ndvi ( normalized difference vegetation index ) data and estimation model

    本文首先運用1981 - 2001年的統計資料（作物產量和各種途徑的農業投入數據） ，對沿海十省區農田生態系統碳源匯及凈碳匯進行了估算，並分析了其時空差異；然後運用1998年逐月ndvi數據通過建模對沿海地區農田生態系統npp進行了估算，並分析了npp分佈與農田生態系統碳吸收的相關性；最後通過對農田生態系統碳源匯的影響因素分析，提出了不同的農田生態系統碳增匯減排技術。
  9. A background database for monitoring crop condition is designed and set up through analyzing operating methods of monitoring crop condition from china and other countries. combination analyzing method of multi - temporal images and multi - source data is studied in this paper

    設計並建立了農情遙感監測背景數據庫，研究了多時相、多源數據復合分析方法，開發了作物遙感識別運行化技術體系。
  10. Alfalfa is the main source of hay for canada s dairy industry and alfalfa seed is the main legume seed crop

    紫花苜蓿是加拿大乳品加工業的主要乾草來源，紫花苜蓿種子是主要豆類種子作物。
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