A kind of prescription of float expanded feed for tilapia and preparation method
[technical field]
The invention belongs to fish meal and preparation method thereof field, relate in particular to a kind of prescription and preparation method of float expanded feed for tilapia.
[background technology]
Tilapia mossambica belongs to Perciformes, Callichthyidae, is us to the general names of the bolti of common breed, Sarotherodon sp, Mozambique Tilapia mossambica etc.Tilapia mossambica has that feeding habits are wide, lower oxygen concentration resistance, growth are fast, morbidity less, advantage such as fertility is strong, be defined as " cultured fishes likely " by international food and agricultural organization (FAO).Since 1981 introduced China, Tilapia mossambica was cultured scope and has spreaded all over the whole nation, becomes one of main object of China's fresh water aquaculture.The quality of feeding quality is one of key technology of Tilapia mossambica aquaculture development.At the nutritional need of Tilapia mossambica, the someone has designed pisciculture of Tilapia mossambica particle and method for making (Chinese patent CN1153605) and Tilapia mossambica parent population pellet and manufacture method (Chinese patent CN1666636) thereof.Current in the breeding process of Tilapia mossambica; the hard pellet diet that is to use common granulator to make more; exist water stability poor; feed waste is big; the problem serious to water quality impact, the while has also caused Tilapia mossambica the digestibility reduction of feed to be influenced the culture efficiency of feed owing to particle is hard with reasons such as adding binding agent.Offer the breed fish with enough ingest times, reduced the waste of feed and use the buoyancy expanding feed to keep afloat in Tilapia mossambica is cultured, the feed through high temperature puffing has characteristics such as water stability is good, digestibility height simultaneously.At present, culturing at Tilapia mossambica and reduce water pollution is that the high-grade buoyancy expanding feed of target yet there are no.
[summary of the invention]
It is simple, balanced in nutrition to the purpose of this invention is to provide a kind of preparation, can satisfy Tilapia mossambica growth demand also reduces the water pollution that causes because of the feed of throwing something and feeding in the Tilapia mossambica breeding process buoyancy expanding compound feed.
A kind of float expanded feed for tilapia prescription of the present invention, component that contains and quality percentage composition thereof are: straight fiery fish meal 8~12%, big dregs of beans 20~30%, meat meal tankage 0~10%, rapeseed dregs 20~30%, malt root 5~10%, liquid phosphatidase 10 .5~1%, inferior powder 3~5%, corn 15~30%, calcium monohydrogen phosphate 0.5~1%, compound premix 1~2%, soya-bean oil 0~0.5%, fish oil 0.5~1%.
The preferred float expanded feed for tilapia prescription of the present invention, component that contains and quality percentage composition thereof are: straight fiery fish meal 10%, big dregs of beans 20%, meat meal tankage 10%, rapeseed dregs 22%, malt root 8%, liquid phosphatidase 11 %, inferior powder 5%, corn 20%, calcium monohydrogen phosphate 1%, compound premix 2%, fish oil 1%.
The preparation method of a kind of float expanded feed for tilapia of the present invention, operating procedure is:
A, by the prescription in each constituent mass percentage composition take by weighing each component;
B, mix, make all the components can both pass through 20~40 purpose screen clothes after micronizer is pulverized;
C, the material after pulverizing feed each component of prescription and add up to quality 13%, 90~95 ℃ steam modulation 5~8 minutes in modem, make raw material enter the granulation of extrusion granulator then under 90~98 ℃ temperature;
D, under 93~100 ℃ of conditions, the feed granules after expanded oven dry is got final product.
Carried out 4 months by a definite date Tilapia mossambica culture experiment in April, 2006 in the emerging group of Guangdong perseverance comprehensive testing ground.Result of the test finds that the speed of growth of using expanded pellet diet of the present invention to compare Tilapia mossambica with the conventional granulates feed has improved more than 30%, and feed coefficient can be controlled at below 1.1%, and uses conventional granulates feed feed coefficient generally more than 1.6.In addition, compare with the sinking pellet diet of throwing something and feeding, use this expanding compound feed cultivating tilapia, the nitrogen phosphorus that discharges in the pond can reduce 50%, and condition of water quality has not only promoted the growth of Tilapia mossambica preferably, makes also that to have formed Tilapia mossambica more healthy.
The present invention is directed to the digestive physiological characteristics of Tilapia mossambica, select the high feedstuff of bioavailability, comprise fish meal, dregs of beans and the dish dregs of rice etc., these raw materials have the Tilapia mossambica of promotion and grow fast, improve the Tilapia mossambica digestibility, reduce nitrogen, phosphorus drainage, strengthen advantages such as resistance pathogen.In addition, these raw materials are purchased easily, and are cheap, can save the feed cost of cultivating tilapia greatly.In addition, this feed making becomes expanded pellet diet, has extraordinary water stability, can be floating in water more than 5 hours and not defeated and dispersed, therefore be particularly suitable for ingesting of Tilapia mossambica, and reduced the waste of feed.
This shows that product of the present invention has following advantage: low, the Tilapia mossambica fast growth of (1) feed coefficient; (2) the feed water stability is good, is difficult for polluting breeding water body water quality; (3) raw material is simple and easy to, and reduces aquaculture cost.
[specific embodiment]
Embodiment 1: preparation Tilapia mossambica expanded pellet diet 1
A, take by weighing straight fiery fish meal 10kg, big dregs of beans 20kg, meat meal tankage 10kg, rapeseed dregs 22kg, malt root 8kg, liquid phosphatidase 11 kg, inferior powder 5kg, corn 20kg, calcium monohydrogen phosphate 1kg, compound premix (commercially available) 2kg, fish oil 1kg;
B, mix, make all the components can both pass through 20 purpose screen clothes after micronizer is pulverized;
C, the material after pulverizing feed 13kg, 90 ℃ steam modulation 7 minutes in modem, make raw material enter the extrusion granulator then under 98 ℃ temperature and granulate;
D, under 100 ℃ of conditions, the feed granules after expanded oven dry is got final product.
Embodiment 2: preparation Tilapia mossambica expanded pellet diet 2
A, take by weighing straight fiery fish meal 8kg, big dregs of beans 30kg, rapeseed dregs 30kg, malt root 10kg, liquid phosphatidase 11 kg, inferior powder 3.5kg, corn 13kg, calcium monohydrogen phosphate 1kg, compound premix (commercially available) 2kg, soya-bean oil 0.5kg, fish oil 1kg;
B, mix, make all the components can both pass through 30 purpose screen clothes after micronizer is pulverized;
C, the material after pulverizing feed 13kg, 95 ℃ steam modulation 5 minutes in modem, make raw material enter the extrusion granulator then under 95 ℃ temperature and granulate;
D, under 93 ℃ of conditions, the feed granules after expanded oven dry is got final product.
Embodiment 2: preparation Tilapia mossambica expanded pellet diet 2
A, take by weighing straight fiery fish meal 12kg, big dregs of beans 25kg, meat meal tankage 10kg, rapeseed dregs 20kg, malt root 5kg, liquid phosphatidase 11 kg, inferior powder 5kg, corn 20kg, calcium monohydrogen phosphate 1kg, compound premix (commercially available) 1kg, fish oil 1kg;
B, mix, make all the components can both pass through 40 purpose screen clothes after micronizer is pulverized;
C, the material after pulverizing feed 13kg, 93 ℃ steam modulation 6 minutes in modem, make raw material enter the extrusion granulator then under 97 ℃ temperature and granulate;
D, under 92 ℃ of conditions, the feed granules after expanded oven dry is got final product.