《尼龙袋充氧密封运输法(尼龙袋装运鱼苗、鱼种密度容积约25升)》由会员分享，可在线阅读，更多相关《尼龙袋充氧密封运输法(尼龙袋装运鱼苗、鱼种密度容积约25升)（4页珍藏版）》请在金锄头文库上搜索。
1、，A, ecosystem temperament1, eat sexThe grass carp is the grass food fish of example, under the natural shape fish with drink water grass for lord.The category of pleased food has a bitterness grass, round black Zao to leaf, float Ping etc.Keep to feed a premise at home under, the hurl feeds every va
2、riety pleased eat of water grass, six living the grain undergraduate course grass and each kind of Jing animal feed.The fish fry develops an early stage baby fish eat a food round insect etc. minuteness at first vexed Men thing, till summer spent stage turn eat a Cape wait large float visited a plan
3、t combine to eat a food floated Ping, Piao a kind of insect and delicate water, six grass conversions.Each growth stage all pleased cannibalism work Jing animal feed.2, growThe grass carp belongs to growth quickly large economic fish.2-3 ages grow up most quickly.Keep a premise in the pond bottom th
4、e community grow speed 1 age fish general 50-60 gs, 2 ages can reach to a 500-750 gs, 3 the ages are 2-3 kilograms, with is a grass carp farming period for 2.5-3 years.Sex childish manner 4-5 years, 5 ages grow up speed behind notable reduce slowly.1-3 age pins are male individual and grow velocity
5、likeness.Female bodys growing up speed is quicker than a male body after 4 ages.3, stir upThe grass carp belongs to the big river fresh-water fish.Under the natural condition, our country main big river river the subsidiary current all have it to produce an egg field, producing the close fish of egg
6、 moral integrity can visit to produce an egg field to carry on creating egg to stir up, but keep pond to keep a premise at home bottom then not ability.The grass carp immature spring autumn has warm and affectionate relation with individual size and degree of latitude(calories).Is southern in our co
7、untry China, sex become the Kang year Chi is 3-4 ages, weight 14 kilograms order about;In R.O.C, sex immature 4-5 ages, weight 5 kilograms order about;In the northeast, sex hurtles weak 6-7 ageses, weight 6,000 grams order about.Rest, sex hurtles weak still is as irrelevant as nutrient condition, th
8、e nutrient is unsuited to, sex kid the childhood years Chi and weight will also appear difference.The male still spreads all over for precocious year than the pantheress, the individual is partial to than the pantheress small.Two, the artificial breed1, the close fish decideDecide to grow one of the
9、 basis premises that the good qualified close fish of quality and physical endowment is that the grass carp is wild to multiply greatly.The so-called kind of quality is good, namely basis our country“four everyone fishes“s of“three rivers“(Yangtze River, Pearl River and Heilongjiang)s grow quality t
10、o investigate to delve into, with the kind quality of Yangtze River had better, so decided Yangtze River to grow a grass carp to compare for ambition at first.The so-called physical endowment is good, a fish body strong solid, the body color is normal, the scale is decrepit, not hurt and disease fre
11、e individual.Dont reach sex maturity of individual, as a spare close fish, hurtle weak individual, Be livinged to produce to use close fish in the past.BE making a choice close fish, should also be careful Pin male foppery clothing, usually the male body is slightly more than a female body.2, the cl
12、ose fish bring up(1)the close fish accomplish pond.The close fish accomplishes the area ，of pond 2/15-4/15 hms 2(2-4 acre), water is deep 1.5-2.5 ms.The personal status is placed in to urge to produce pond surroundings and drains benefit then, environment rather Jing.The pure pond put to use a calci
13、um oxide before keeping.(2)put to keep density.The hectare garden pond puts to keep a close fish 2250 kg a domination each time.Bisexual proportion is 1:1 or 1:1.25.For well making use of bait to anticipate and regulating fluid matter, under the premise kept by grass close fish lord, the hectare can
14、 also mix to keep close fish of silver carp or Mao 50-60 tails each time.(3)animal feed.The animal feed of the grass close fish is initial for grass that rye grass, Sudan grass, and elephant grass.etc. of grain undergraduate course are wild to plant a kind and six living grass and water to living bi
15、tterness grass, leafs round black Zao etc.It secondly is various solid type in valley and house to keep to match with animal feed.3, the close fish urge a creation(1)urge to produce time, water temperature:Elegant district in Yangtze River, urge to create the date as mid- May, last ten days of month
16、, urge to produce water temperature 2528 lords the most suitable proper.(2)the close fish choose do not:In person the child degree of fish directly the influence urge manufacturing effect, the Jian knows the norm as male fish to lightly push to have semen run off in the belly and meet water after immediately spread out, female fish belly the Peng is big, loose soft ha
