fish yield 中文意思是什麼
fish yield
解釋
魚產量-
On the basis of the discussion of the ecological rehabilitation on subsidence land of coal extraction, the land structures of nourishment, plane and perpendicularity on subsidence area of coal extraction are differently designed. on nutritive structure green crops are mainly common crops, green vegetables, green forage crops and acquatic creatures. on plane structure the center of the subsidence land of coal extraction can be used as fish culture in net cage, the periphery can be established as fish pool and economic crops in water, and the outmost layer can be used as high - yield field, vegetable shed, domestic animal breeding area and fruit - bearing forest. on vertical structure the deepwater area can be established as fish pool and economic crops in water, and the uppermost layer can be developed as acquatic and semi - acquatic crops or dry farming crops
在討論採煤塌陷地生態復墾的基礎上，對新泰市採煤塌陷區生態復墾用地的營養結構、平面結構和垂直結構進行了優化設計.在營養結構上，綠色作物主要是農作物、蔬菜、飼料及水生生物.在平面結構上，在塌陷的中心地帶實施網箱養魚，外圍區建立精養漁塘和水生經濟作物，最外層生態復墾為高產農田、蔬菜大棚、畜禽養殖區和林果地.在垂直結構上，在積水區建立精養漁塘和水生經濟作物，最上層則發展水生、半水生及旱作綠色經濟作物 -
The annual yield of grass carp covers 20 % in total output of the fresh water fish, which is fast growing and tastes delicious, besides, the forages of grass carp are various, with a lower cost of raising, however, at present, the serious diseaes of grass carp results in a lower survival rate 10 - 15 %, which cause more then billions yuan economic losses per year to the fresh water cultiuation, especially, hemorrhagic virus of carp lasts for a long period of time and features a high death rate, therefore, it " s a woed - wide problem for the aquacultural scientific researchers to discover an effective settlement, which is still under the discussion
其生長快、飼料來源廣、飼養成本低和肉味鮮美。但草魚病害多，危害嚴重，目前草魚由苗種養至成魚的成活率僅為10 - 15 ，每年給我國淡水養殖業造成數億元經濟損失。特別是病毒性的草魚出血病，流行季節長，發病死亡率高，因此，對草魚出血病的有效防治一直是世界各國水產科學工作者艱苦探索而又未能找到理想解決辦法的世界性難題。 -
" what happened between 1993 and 2000 is there was an exponential increase in the yield of fish cages from 300 tons per year to something like 2, 000 tons per year, " loya said
洛亞說： 「 1993年至2000年期間，撒網養魚的產量呈指數倍增長，由每年三百噸增加到每年大約兩千噸。 」
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