Kỹ thuật nuôi cá lóc trong ao đất (2tr)

KHOA HOC - UfNG DUNG<br /> <br /> v g t phu d u (trQng nQde), ket<br /> h d p vdi b d n p h d n t g o mdu<br /> nUdc xanh d g t trQdc.<br /> <br /> Trong trQdng h d p thieu hdp<br /> nhQng logi thQc d n tren co<br /> the c h o c d d n c u a , c d t g p<br /> xay n h u y d n : 1 kg c u a , e d t g p /<br /> 10.000 e d e o n / n g d y .<br /> - Giai d o g n e d 18-25 ngdy<br /> tudi: v d n sd d g n g nhQng logi<br /> thQc d n tren v d b d sung them<br /> Vitamin C, Vitamin ADE. Luc<br /> n d y c d d d c d m d u v d n g , tren<br /> thdn xud't hign v d y , c d me<br /> khdng c d n q u a n h q u d n ben<br /> e d c o n v d e d eon c u n g bdt<br /> d d u t d e h d d n sdng d g e Igp.<br /> <br /> - Giai d o g n e d 25-35 ngdy<br /> tudi: Cd dd cd mdu den<br /> I Ky thudt adng nudi cd - Bdn p h d n e h u d n g (phdn<br /> gidng c d trddng thdnh, chieu<br /> Idc: g d , b d , heo...) u c h o hoai, lieu<br /> d d i 2-6 em. An dQde c d tgp<br /> 1, Udng c d bgt 5 n g d y tudi IQgng 10-15kg/100m'ao.<br /> xay n h u y e n , IQdng cho dn<br /> (chieu ddi khodng 6 em) - Bdn p h d n d g m (phdn ure) khodng 10% trgng IQgng thdn<br /> thdnh e d gidng 60 n g d y tudi 300 gram/100 m^ a o , p h d n Idn e d . Tl Ig sdng d e n giai dogn<br /> (chieu d d i khodng 6-12 cm). 100 gr/ 100 m^ ao. Khi p h d n n d y khodng 80%.<br /> b d n Idt d d phdn huy het<br /> a. Didu kign ao Qdng: - Giai d o g n c d 35- 60 ngdy<br /> (6-7 n g d y ) nddc c d m d u xanh<br /> - Dign tich 200 - 1.000 m^ tudi: Thdn d d i 6-12 c m dgt tieu<br /> d g t chudi thi tien hdnh t h d c d<br /> c h u d n e d gidng. Cho ed dn<br /> glQ nQde dQde trong m u a kigt v d o Qdng.<br /> c d c logi e d t g p , torn t e p , lieu<br /> vd khong bj n g g p trong m u a e. Mdt d g thd Qdng:<br /> IQdng 8% trgng IQdng e d . TT Ig<br /> Id. Ngudn nQde khdng bj<br /> M g t d g thd e d Qdng tQ sdng trong giai dogn ndy<br /> nhiem b d n , nhidm phen. Cd'p<br /> 5.000 - 10.000 c o n c d bgt/ khodng 6(D%. Luc n d y d d cd<br /> thodt nadc c h u d d n g , d g sdu lOOm^ oo. Ne'u Qdng e d b d n g the t u y e n iga c d d d n g e d dQa<br /> 1,2- 1,5 m. v e o d d t trong a o (ed nhQng ra a o Idn nudi thdnh e d thjt. ,<br /> - Bdn vdi d e diet t g p , digt d i d u kign nhd tren) m g t d g<br /> 2. Nudi ed Idc thQdng<br /> m d m bgnh vd t d n g pH (khdng adng Id 800 - 1000 e o n / l m '<br /> phdm:<br /> bj phen). Lieu Idgng vdi: 10-15 veo.<br /> - Vi Id lodi e d dQ chuyen<br /> kg/100 m^ao (ao mdi ddo). d. Cho d n vd c h d m sdc:<br /> b d t mdi sdng nen giai dogn<br /> b. Bdn p h d n t g o thQc d n tQ - Giai d o g n e d 5-15 n g d y nudi thit khdng c d n bdn phdn<br /> nhien: tudi: Chu ye'u c h o d n d g n g g d y m d u nQde. Trong a o nudi, ly<br /> <br /> <br /> <br /> KH&CN Binh Thuan - 28 - So 02/2010<br />  KHOA HOC - UfNG DUNG<br /> <br /> ngodi sCf dgng c d c logi e d t g p , phdm euo nhd m d y che bie'n. ddng c h d y de d d m b d o d u<br /> c d cdn e d the dn c d c thQc dn Khd ndng sd dgng thac dn Idgng oxy cho ao, trdnh ddng<br /> che bie'n c d hdm lUdng d g m c u e c d thay ddi theo tdng m d t do d d y , Thddng xuyen<br /> coo, lddng cho dn chiem t d giai d o g n phdt trien c u a c d d u n g mudi dn tddi oo, Hdu<br /> 5 - 6% trgng IQdng c d the e d . Luc c d c d n nhd c d n lddng 1-2 kg/m^ nddc ao,<br /> - Mgt d d thd nudi: 8-10 cho d n nhieu hdn c d Idn, c d - C d ddng d gioi d o g n Idn<br /> c o n / l m ^ ao, the tham khdo theo bdng sou: hdn 25 ngdy tudi de'n 60 ngdy<br /> - Nudi 8 thdng c d d g t trgng Kich c d c d gidng (gr/eon) - tudi: (5 giai d o g n ndy ed hao<br /> IQgng trung binh 600 gr/eon. Khdu phdn dn (%)/trgng hgt nhieu nhdt. Benh thddng<br /> - Hg sd thQc en c u a ed Idc Idgng e d . gdp Id viem rudt do ed<br /> Id 5-6 kg thQc dn/1 kg c d .