S dng men vi sinh trong nui trng thy sn
S dng men vi sinh trong nui trng thy snXut bn Vit Php (https://www.viphatech.com)
S dng men vi sinh trong nui trng thy sn viphatech gi vo T6, 29/10/2010 - 2:02ch S dng ch phm sinh hc (men vi sinh) trong nui trng thy sn l hng i c ngha thc tinv kha cnh bo v mi trng v m bo hiu qu sn xut. T , gp phn a ngh nui thysn pht trin bn vng. m bo hiu qu s dng men vi sinh, ngi nui cn tham kho mts vn lin quan sau y.
Hai thnh phn ch yu ca men vi sinh l vi khun c li v cc cht dinh dng nui vi khun.Vi khun c li c phn lp t nhiu ni khc nhau nh trong t, trong nc bin, trong rc.Chng gm cc loi nh Bacillus sp (ba-xi-lut), Nitrosomonas (ni-tr -s-m-nat), Nitrobacter (ni-tr-bat-te)Cht dinh dng l cc loi ng, mui canxi, mui magie
V hnh thc, men vi sinh c 02 dng, dng nc v dng bt (hay dng vin). Thng thng, dngbt c mt s vi khun c li cao hn so vi dng nc. V chng loi, men vi sinh c 02 loi, loidng x l mi trng (loi vi khun ch yu l Bacillus sp) v loi trn vo thc n cho tm c(loi vi khun ch yu l Lactobacillus (lac-t-ba-xi-lut).
Cc li ch mang li khi s dng men vi sinh gm mt hay nhiu iu sau y:
(1) Lm n nh cht lng nc v nn y trong ao nui tm c.
(2) Nng cao sc kho v sc khng tm c nui.
(3) Gim thiu nhim mi trng ao nui v xung quanh do nui trng thu sn gy nn.
(4) Nng cao hiu qu s dng thc n.
Cc li ch t c nh trn l do hot ng tch cc ca vi khun qua mt hay nhiu c ch tcng nh sau:
(1) Cnh tranh mnh m cht dinh dng, nng lng v ni bm vi cc loi vi khun c hi v toc.
(2) Chuyn ho cc cht hu c nh thc n d tha, xc to, cn b thnh CO2 v nc; chuyn cccht c hi nh NH3, NO2- thnh cc cht khng c nh NO3-, NH4+.
(3) Hn ch vi khun c hi trong ng rut v gip chuyn ho hiu qu thc n.
(4) Tit ra mt s cht khng sinh, enzyme hay ho cht km hm hay tiu dit mm bnh v toc.
men vi sinh pht huy hiu qu cao, ngi nui thy sn phi tun th theo mt s ngun tc sdng sau y:
- Ho long men vi sinh bng nc trong ao nui, cho vo x, thau, sau sc kh 4 -5 gi n khimen c mi chua hay pH gim th tin hnh em bn.
- nh k s dng trong sut qu trnh nui, thng thng, t 7 -10 ngy s dng mt ln i vi loix l mi trng v lun phin s dng 5 ngy, sau ngng 5 ngy i vi loi trn vo thc n.Ln u tin s dng cng lc vi bn phn gy mu nc hay khi nc ln mu.
- Liu lng s dng phi theo ng theo yu cu ca nh sn xut.
- Khi mi trng ao nui c du hiu hay ang suy gim cht lng nh hm lng kh c cao (NH3,
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S dng men vi sinh trong nui trng thy snXut bn Vit Php (https://www.viphatech.com)
H2S, NO2), nc nhiu cn b, nc pht sng th men vi sinh c s dng sm hn so vi bnhthng vi liu lng tng gp 2 ln so vi yu cu.
- Khng c s dng men vi sinh cng vi cc loi ho cht c tnh dit khun nh BKC, thuc tm,Chlorine, Iodine, khng sinh. ng thi, khng c s dng men vi sinh khi cc cht trn ang hindin trong mi trng nc hay trong c th tm c nui.
- men vi sinh cho hiu qu s dng cao hn, ngi nui nn ly nc tt vo ao v trc khi bnmen vi sinh cn ci thin mi trng ao nui qua cc bin php nh thay nc, bn vi nng pH ln7,5 8,5, bn Dolomite nng cao kim
Men vi sinh s c hiu qu sau khi s dng khong 2 4 ngy, th hin qua mu nc v cc ch tiumi trng khc khi o t.
Ths. Nguyn Thnh Phc
Cng ngh mi trng
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