Potassium diformate(PDF) munyu wakasanganiswa wakashandiswa senge isiri-antibiotic feed additive kukurudzira kukura kwezvipfuyo.Zvisinei, zvidzidzo zvishomanana zvakanyorwa mumhando dzemvura, uye kushanda kwayo kunopesana.

Ongororo yapfuura paAtlantic salmon yakaratidza kuti madyiro ane hove akabatwa ne1.4v PDF akavandudza mashandiro ekudya uye kukura kwekukura.Mibairo yakavakirwa pakukura kwehybrid tilapia yakaratidzawo kuti kuwedzera kwe0.2 muzana yePDF mukudya kwekuyedzwa kwakawedzera kukura nekubudirira kwekudya, uye kuderera kwehutachiona hwehutachiona.

Kusiyana neizvi, ongororo yevadiki hybrid tilapia yakaratidza kuti kuwedzera kwePDF kusvika ku1.2 muzana yekudya hakuna kuratidza kuvandudzwa mukukura kwekuita, kunyangwe ichidzvinyirira zvakanyanya mabhakitiriya emudumbu.Kubva pane ruzivo rushoma rwuripo, kushanda kwePDF mukushanda kwehove kunoratidzika kunge kwakasiyana zvichienderana nemhando, nhanho yehupenyu, mazinga ekuwedzera ePDF, bvunzo kuumbwa uye tsika mamiriro.

Kuedza kugadzira

yakaita muyedzo wekukura paOceanic Institute muHawaii, USA, kuti iongorore mhedzisiro yePDF pakukura kwekuita uye digestibility yePacific white shrimp inogadzirwa mumvura yakachena.Yakatsigirwa nemari neDhipatimendi reKurimwa Kwekurima reUS uye kuburikidza nechibvumirano chekushandira pamwe neYunivhesiti yeAlaska Fairbanks.

Juvenile Pacific white shrimp (Litopenaeus vannamei) dzakagadzirwa mukati mekuyerera kwemukati-kuburikidza nekuchenesa-mvura system ine 31 ppt salinity uye 25 degrees-C tembiricha.Vakadyiswa zviyedzo zvitanhatu ne35 muzana mapuroteni uye 6 muzana lipid ine PDF pa0, 0.3, 0.6, 1.2 kana 1.5 muzana.

Pamagiramu zana ega ega, chikafu chebasal chakagadzirwa kuti chive ne30.0 magiramu esoya bean, 15.0 gramu pollock meal, 6.0 magiramu squid meal, 2.0 magiramu menhaden mafuta, 2.0 magiramu soy lecithin, 33.8 magiramu egorosi, 1.0 giramu imwe chromium oxide zvinhu (kusanganisira zvicherwa uye mavitamini).Pakudya kwega kwega, mana 52-L matangi akaiswa pa12 shrimp / tank.Ne 0.84-giramu yehuremu hwekutanga hwemuviri, shrimp yaipihwa ruoko kane zuva nezuva kuti iite senge satiation kwemavhiki masere.

Pakuyedzwa kwekudya, 120 shrimp ine huremu hwemuviri hwe9 kusvika gumi magiramu dzakagadzirwa mune imwe neimwe ye18, 550-L matangi ane matatu matangi / chikafu chekudya.Chromium oxide yakashandiswa semucherechedzo wemukati wekuyeresa zvinooneka digestibility coefficient.

Results

Kuwedzera kwevhiki kwevhiki kwehuremu hwe shrimp kubva pa 0.6 kusvika ku 0.8 magiramu uye yaiwanzowedzera mukurapa ne 1.2 uye 1.5 muzana yezvokudya zvepa PDF, asi yakanga isina kunyanya (P> 0.05) yakasiyana pakati pemishonga yezvokudya.Kupona kwe shrimp kwaive 97 muzana kana kupfuura muyedzo yekukura.

Feed-conversion ratios (FCRs) yaive yakafanana neyekudya ine 0.3 uye 0.6 muzana PDF, uye ese ari maviri aive akaderera pane iyo FCR ye1.2 muzana PDF kudya (P <0.05) Zvisinei, maFCR ekutonga, 1.2 uye 1.5 muzana PDF. kudya kwakafanana (P> 0.05).

Shrimp yakadyisa 1.2 muzana yezvokudya yakanga ine digestibility yakaderera (P <0.05) yechinhu chakaoma, mapuroteni uye simba rakawanda kupfuura shrimp yakadyisa zvimwe zvokudya (Fig. 2).Kugaya kwavo kwekudya lipids, zvisinei, hakuna kukanganiswa (P> 0.05) nemazinga ePDF.

Maonero

Ichi chidzidzo chakaratidza kuti kuwedzera kwePDF kusvika ku1.5 muzana mukudya hakuna kukanganisa kukura uye kupona kweshrimp inogadzirwa mumvura yakachena.Ongororo iyi yakanga yakafanana neyakambowanikwa nehybrid juvenile tilapia, asi yakasiyana nemhedzisiro inowanikwa mutsvakurudzo neAtlantic salmon uye kukura kwehybrid tilapia.

Mhedzisiro yekudya PDF paFCR uye digestibility zvakaratidza kutsamira kwedosi muchidzidzo ichi.Zvinogoneka iyo yakakwira FCR ye1.2 muzana yekudya kwePDF yakakonzerwa nekuderera kwekudya kweprotein, yakaoma nyaya uye simba rakawanda rekudya.Pane ruzivo rushoma maererano nemhedzisiro yePDF pane zvinovaka muviri digestibility mumhando dzemvura.

Zvigumisiro zvechidzidzo ichi zvakanga zvakasiyana neaya emushumo wekare wakataura kuti kuwedzerwa kwePDF kuhove dzehove panguva yekuchengetedza kusati kwaitwa kudya kwakawedzera kuwedzera kweprotein digestibility.Kubudirira kwakasiyana-siyana kwekudya PDF kunowanikwa mune zvidzidzo zvemazuva ano uye zvekare zvinogona kunge zvakakonzerwa nemamiriro akasiyana-siyana, akadai semhando yekuedza, tsika yemagariro, kugadzirwa kwezvokudya kana mamwe maitiro ekuedza.Chikonzero chaicho chekusawirirana uku chaive chisina kujeka uye chinopa kuenderera mberi nekuongorora.