yaan 中文意思是什麼

yaan 解釋
雅安
  1. 3000 yaan entry fee for each team and 1000 yuan for each individual competitor

    （三）每隊交報名費3000元。如僅報個人比桿賽，每人交報名費1000元。
  2. This paper deals with the results of preliminary investigation on the plant parasitic nematodes in yaan. 24 species of plant parasitic nematodes were found from 39 species of plants in yaan from 1993 to 1995

    於1993 - 1995年先後用直接剝離法和貝爾曼法對雅安市的39種農作物、果蔬、花卉及雜草的根和根際土壤，少數植物的莖葉及果實進行了檢查。
  3. Sichuan agriculture university held a seminar on animal nutrition and feed technology in yaan city oct 22 - 23

    四川省農業大學於10月22 - 23日在雅安市舉辦了一期動物營養和飼料技術研究會。
  4. ( c ) land natural productivity increase from 7843 kg / ( hm2 - a ) to 17335 kg / ( hm2 - a ) relate to altitude closely, and the mean rate of enhancing yield is 23. 53 percent in this region with annual enhancing - rate of 0. 64 percent in last 15 years. ( d ) there are many facters that have been influe ncing soil effective coefficient that ' s soil organic matter, total nitrogen, effective phosphine and soil texture in turn. in a word, attenuation cause of land productivity is the result of water and soil. ( e ) the forestland potential productivity change from 3986 kg / hm2 to 15034 kg / hm2, but it has a high distinction between southern aera and north area in yaan city. ( f ) the grassland potential productivity increase from 4085 kg / ( hm2 - a ) to 16973 kg / ( hm2 - a ), but it has a high classification of potential productivity, ( g ) ditribution map was formed of potential land productivity. ( h ) it could be act as decision support for agriculture development, national land planning and ecotop constructive, etc

    5 、土地自然生產潛力水平的主要土壤限制因素為有機質、全氮，其次為速效磷和土壤質地；區域潛在生產力差異的制約因素，主要為土壤，次為水分，水、土兩項衰減合計為45 . 99 ，石棉、漢源兩縣水、土衰減達到60左右。 6 、林地潛力在3986 15034kg / hm ~ 2之間，高等級林地比重小，以大相嶺為界，北部的各縣林地生產力水平高，南部的兩縣林地生產力水平較低。 7 、天然草地生產潛力水平高，潛力在16973 4085kg / （ hm ~ 2 ? a ）之間，以高產的一、二、三級草地為主，且近10年來該比例變化不大。
  5. Landslide genetic analysis in yaan city sichuan province

    四川省雅安市雨城區滑坡災害成因調查摘要
  6. 16032 evaluation units of the potential land productivity were overlaid out. by using the mechamism methodology and relative computing models, yaan city ' s land productive potentiality was computed according to synthetic index of land productivity evaluation that was taken as soil effective coefficient. result of research indicated that : ( a ) siol effective coefficient changed from 0. 3047 to 0. 8550, respectively with medium - low yield farmland of 71. 28 percent. ( b ) the division of climate productivibilty is situated on the third degree and fourth class western area in east of chian

    4 、雅安市土地自然生產潛力與目前的實際生產水平比較，其增產潛力平均為23 . 53 ，說明農業技術和管理措施等的增產潛力較大；將目前土地的實際生產水平與15年前比較，土地的實際生產水平逐年上升，年均遞增0 . 64 ，顯然，土地的自然生產潛力是可以通過各種農技措施來挖掘的。
  7. Study on characteristics and exploitation countermeasure of land resources in yaan region

    雅安地區土地資源的特點及開發利用對策探討
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