-----Advertisement, also be a kind of information-----
The author adopts field survey and comparative practice, put forward to last high temperature is right Hua Dong, China in form of the influence of animal of area aquatic product, expression and administrative proposal
Civil / graph Wuhan Guo Zhiwen of limited company of old aquatic product
Since August 2018, hua Dong, China in the area lasts high temperature, drought little rain, partial area air temperature exceeds 38 ℃ above more than days 10 continuously, cause aquiculture animal to be not frequency of disease of sex of cause of disease to send, cause quite big loss to aquiculture practitioner. The happening of the circumstance such as pool of the head of aquiculture animal float that to lasting to answer high temperature causes, float, the author adopts many field survey and comparative practice, will last now the happening of disease of animal of the aquiculture below high temperature condition, development, popular rule and summary of measure of prevention and cure are as follows, in order to answer Hua Dong, China in reason of sex of cause of disease of blame of current aquiculture animal causes the area should stimulate a gender to die.
High temperature is anoxic bring about hair of float pool frequency
One
Continuously high temperature causes water quality undesirable with breed an animal to should stimulate response
Continuously high temperature and long strong illumination, cause the water that breeds water system lukewarm exorbitant, make breed water system capacity to increase, ammoniacal nitrogen and nitrite are added suddenly relative to chroma, and cause the answering with aquiculture acuteness animal to stimulate response, its basically behave a form to be as follows:
1, phenomenon of nightly float head is very frequent, pool of aquiculture animal float is caused when the extreme. Continuously high temperature causes alga photosynthesis is intense by day, breed speed is accelerated, bring about breed quantity of phytolankton of water system days to be added suddenly, but cannot supply dissolve oxygen not only to nightly alga respiration, and the oxygen demand that increases water put oneself in another's position even, make aquiculture animal is entered thereby nightly hind appear the phenomenon of anoxic float head. If encounter weather mutation or the material of oxygen of organic bad news in breeding water system to be able to appear too much,float pond, cause thereby breed an animal to die in great quantities.
Continuously anoxic bring about variegated carp mandible to highlight
2, the breed aquatics that pours alga to cause water system is anoxic reach frequency of undesirable water quality to show. The illumination that high temperature season exceeds intensity continuously is caused breed difference in temperature of water system day and night too big, the digenesis that still can bring about alga at the same time ruptures, if alga digenesis produces an obstacle to cause those who breed water system to pour alga phenomenon to happen, those who once produce be the first to be affected,pour alga is to breed water system anoxic and the float head appearance that causes aquiculture animal, govern the undesirable water quality such as occurrence red water of not good at meeting, black water.
3, high temperature alga is like La Zao, green alga, naked alga to wait form water China. Persistent high temperature provided necessary external environment to breed the high temperature alga in water system, what cast bait in great quantities to cause the organic nitrogen in breeding water system and inorganic nitrogen is rich indigestion, this provided the corporeal basis of a large number of multiply for high temperature alga. The excessive multiply of high temperature alga restrained other alga live, the alga in making breed water system thereby is onefold. At the same time high temperature causes some kind of alga excessive multiply also can be caused breed water system PH the value is exorbitant, and change of day and night is too big, cause those who breed an animal to should stimulate response thereby. This year high temperature breed aquatics period because of lasting high temperature is caused breed a pond " thick green " with " ferruginous color " undesirable water quality appears often, because breed water system,this is medium La Zao, green alga or naked alga form an advantage to plant group and cause.
Continuously high temperature brings about South-American white prawn to breed pond blue green alga to break out
4, water system capacity causes inorganic nitrogen chroma to increase greatly. The meeting with persistent strong inevitable illumination causes the capacity that breeds water system to soar, and the acceleration that breeds the exorbitant and inevitable meeting with the warm water in water system to promote organic nitrogen is decomposed, if breed the alga in water system,growth other nutrition salt is lacked or those who cause ammoniacal nitrogen is meet accumulate necessarily when inadequacy, when if encounter oxygen of the dissolve in breeding water system,be not worth at the same time, inevitable also meeting brings the addition of nitrite, nature of this one result can cause the undesirable reaction of aquiculture animal, if molecular ammonia reachs nitrite toxic phenomenon.
5, high temperature causes aquiculture animal to should stimulate a gender to eat feed not flourishing and should stimulate sexual death. Persistent high temperature and strong illumination can cause the occurrence of undesirable water quality not only, same meeting causes those who breed an animal to should stimulate response. The breath that because undesirable meeting causes water quality,breeds an animal on one hand not free, eat feed not the phenomenon such as flourishing; Because of water on the other hand stimulation of lukewarm exorbitant and same meeting breeds animal passivity to get used to specific Gaoshui lukewarm environment, and difference in temperature of day and night also can cause those who breed an animal to should stimulate reaction to strengthen greatly too. A variety of elements are like when joint action breed animal oneself regulating system to produce an obstacle to cause aquiculture animal to appear should stimulate sexual death.
6, the disease of sex of cause of disease of animal of the aquiculture below high temperature condition is less. Disease of the bacterial sex of aquiculture animal, virus sex and verminosis have its relatively specific water Wen Huan condition, high temperature condition falls and do not suit the hyperplasia of cause of disease and transmission continuously, relative to character, the disease that issues aquiculture to the animal is invaded because of cause of disease and be caused in current and specific high temperature and strong illumination condition is less.
2
The proposal of aquiculture animal disease prevents below high temperature condition continuously
1, strengthen nightly add oxygen;
2, reduce the amount that cast bait, decrease moderately feed;
3, maintain pond water level to be in 1.5 meters of above, science takes fill water step, avoid to breed difference in temperature of pond morning and evening too big, lest breed an animal to appear,should stimulate sexual harm;
4, reduce inorganic nitrogen and organic nitrogenous fertilizer to invest an amount, increase " calcium superphosphate " , " potassium chloride " , " vitriolic magnesium " the devoted quantity that waits for inorganic salt;
5, use of every 4-7 nature " gemma bacili " , " light and bacterium " wait;
6, avoid to use the preparation that kill insect to reach contain chloric disinfectant, when be necessary truly, answer to be used by small dose;
7, when aquiculture animal disease happens, should insist to decrease feed, reinforce the remedial principle that moves water, to be taken orally;
8, the happening that control pours water of alga, red water, black water, chaotic water, blue green alga and development, the change of nitrogen of value of close monitoring PH, nitrite, ammonia, so that be answered in time;
9, high temperature breed aquatics period can need not fight bug and antiseptic drug as far as possible need not, can use more be like,earth up alga and alexipharmic preparation " organic acid kind " , " humic acid natrium " , " yellow corrupt acerbity Potassium " etc.
Focusing | Review
Reprint statement
-----Advertisement, also be a kind of information-----
