Hiện tượng nuôi tôm càng xanh (macrobrachium rosenbergii) kết hợp tôm thẻ chân trắng (litopenaeus vannamei) và tôm sú (penaeus monodon) tại tỉnh tiền giang

HI$N TRANG NUOl TOM CANG XANH (Macrobrachium rosenbergii) KET H0P TOM THE CHAN TRANG (Litopenaeus vannamei) VA TOM SU (Penaeus monodon) TAITINH KIEN GIANG Ly Van Khanh1, Nguyen Thi Thuy Nga2, Ngo Van Ut3 t m tat Nghien ctiu hien trang nuoi tom cang xanh (Macrobrachium rosenbergii) ket hofp tom the chan trang (Litopenaeus vannamei) va tom su (Penaeus monodon) tai tinh Kien Giang dupe thUc hien nham chon mot mo hinh nuoi tot nhat d vimg U Minh ThUdng, tinh Kien Giang Nghien cdu thUc hien tii thang den thang nam 2020 thong qua phong van triic tiep ket qua nuoi nam 2019 cua % ho dan nuoi t6m cang xanh ket hop tom the chan trang va tom su d vimg U Minh ThUdng, tinh Kien Giang Ket qua cho thay nang suat dat cao nhat nu6i tom cang xanh dpc cung vdi t6m the chan trang (tong nang suit la 13 tan/ha/vu, nang suat t6m cang xanh difc la 0,7 tan/ha/vu va tom the chan trang la 0,6 tan/ha/vu); nang suat dat thap nhat nuoi tom cang xanh thildng ket hop tom the chan trang (tong nang suat la 0,6 tan/ha/vu, nang suat tom cang xanh thildng la 0,3 tan/ha/vu va tom the chan trang la 0,3 tan/ha/vu) Tong chi phi nuoi cao nhat la tom cang xanh thildng ket hop tom the chin trang va tom su vdi 73,3 trieu d6ng/ha/vu va thap nhat la tom cang xanh thildng ket hop tom the chan trang vdi 35,5 trieu ddng/ha/vvi Tong thu cao nhat nuoi tom cang xanh dilc ket hop tom the chan tring vdi 160 trieu dong/ha/vu va thap nhat la tom cang xanh thildng ket hop tom the chan trang vdi 68,6 trieu dong/ha/vu Khi nuoi tom cang xanh dilc ket hop tom the chan tring thi cd lcfi nhuan va ty suit loi nhuan cao nhat (98,4 trieu dong/ha/vu, 1,7 lan) va tdm cang xanh dilc ket hop tdm the chan trang va tdm su cd ty suit lcfi nhuan thip nhat la 1,0 lin Til khoa: Tdm cang xanh, tdm the chan tring, tdm six, nuoi ket hop, tinh Kien Giang I.DATVANDE Dong bang song Ciiu Long co nhieu song, ho, ruong, dam hay ca cac thuy vile mldc Id, khu vile eda song ven bien diloc xem la ndi cd tiem nang phat trien rat ldn cho viec nuoi thuy san nildc ta (Nguyen Thanh Phildng va Tran Ngoc Hai, 2004) Ngoai cac doi tildng nuoi truyen thdng nhil tdm su, tdm the chan trang, thi tdm cang xanh cung la mpt nhflng doi tildng nuoi chu lilc hien nay, tap trung cac tinh An Giang, Kien Giang, Can 1Khoa Thuy san, Triidng Dad hoc Can ThO;2Trung tam khuyen nong Kien Giang 3Chi eye thuy san Kien Giang 121 Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam - So 05(126)/2021 Thd, Dong Thap, Ben Tre, Vmh Long va Tra Vinh (Tran Ngoc Hai va cong tac vien, 2017) Kien Giang la tinh co dia hinh da dang, bp bien dai, nhieu song va hai dao da gop phan tao dieu kien thuan lpi cho nganh nuoi thuy san phat trien Theo Quang Trong Thao (2017), ca tinh co 9.641 tha nuoi TCX tap trung chu yeu cac huyen thuoc vung U Minh Thiipng: Vinh Thuan 6.900 ha, An M inh 1.400 ha, U Minh Thiipng 778 va Go Quao 563 Ngoai hinh thPc nuoi TCX ket hop vPi lua, thi gan day, mo hinh TCX nudi ket hop vPi TTCT va TS ao da co mot so ho dan P vung U Minh Thiipng tinh Kien Giang thpc hien Day la hinh thufc nuoi phat cua ngppi dan, chiia co quy trinh cu the, gap nhieu kho khan va rui ro cao, can c6 nhPng nghien cPu cu the ve mo hinh Chinh vi the, nghien cPu “Hien trang nuoi tom cang xanh ket hpp tom the chan trang va tom su tai tinh Kien Giang” dope thpc hien nham chon mo hinh tot nhat vung U Minh Thiipng tinh Kien Giang II PHUONG PHAP NGHIEN CtfU 2.1 Doi tiipng nghien cPu Cac ho nuoi TCX ket hpp TTCT P vung U Minh Thiipng tinh Kien Giang dope phong van trpc tiep dpa theo bieu mau phong van da dope soan va in sin 2.2 PhiiOng phap nghien cPu 2.2.1 Phtidngphap thu thap vd tong hdp so lieu So lieu so cap se dope thu thap bang each phong van trpc tiep 96 ho nuoi tom cang xanh (TCX) ket hpp t m the chan trang (TTCT) va tom su (TS) ao P cac huyen An Bien, An Minh, U Minh Thiipng va Vinh Thuan thuoc vung U Minh Thiipng, tinh Kien Giang (moi huyen khao sat 25 ho nuoi) tP danh sach cac ho nuoi phong Nong nghiep huyen cung cap bang phieu soan sin Cu the dope chia lam dang mo hinh chinh nhii sau: TCX dpc + TTCT (59 ho), TCX thiibng + TTCT (7 ho), TCX dpc + TTCT + TS (15 ho) va TCX thudng + TTCT + TS (15 ho) Cac thong tin chinh dope phong van nhii sau; Thong tin chung ve ho gia dinh (ho ten, dia chi, giefi tinh, kinh nghiem nuoi tom), ve ky thuat nuoi (dien tich ao, sau ao, so Idpng ao, thPi gian licfng nuoi, kich cP giong, so vu liOng nuoi, mat licing nuoi, liipng thpc an, he so thPc an, nang suat, ty le song, cd thu hoach), ve hieu qua tai chinh cua mo liVnh (thu nhap, chi p h i, 2- 2 Phtidngphdp phan ttch va xii ly so lieu C ic so lieu thu thap dung phan mem Microsoft 122 Excel de xP ly so lieu Cac so lieu ve dien tich ao, sau ao, so liipng ao, thdi gian UOng nuoi, kich cP giong, so vu liPng nuoi, mat Pcfng nuoi, lPpng thPc an, he so thPc an, nang suat, ty le song, cP thu hoach va hieu qua tai chinh dppe tinh gia tri trung binh, lech chuan; Clc so lieu ve ty le ho co ao POng, ty le nguon giong, ty 1$ ho thu tia va ty le ho thua 16 dPpc tinh gia tri phan tram (%) Sau dung phPdng phap mo ta de xem xet so lieu tP dPa ket luan Cac chi tieu hieu qua tai chinh dPpc tinh dpa tren cac cong thPc sau: Tong thu nhap = tong so tien ban san pham Tong chi phi = tong chi phi bien doi + tong chi phi co dinh Lpi nhuan = tong thu nhap - tong chi phi Ti suat lpi nhuan = tong lpi nhuan/tong chi phi 2.3 TtiPi gian va dia diem nghien cPu Nghien cPu dPpc khao sat phong van trpc tiep cac ho nuoi tom cang xanh ket hpp tom the chan trang va tom su ao cac huyen An Bien, An Minh, U Minh Thppng va Vinh Thuan thuoc vung U Minh Thppng, tinh Kien Giang Cac mo hinh dPpc thPc hien quanh nam ThPi gian phong van cac ho nuoi tP thang den thang nam 2020 Cac so lieu phong van thu thap ket qua nuoi nam 2019 cua cac ho III KET QUA VA THAO LUAN 3.1 Khia canh ky thuat cua cac m hinh nudi 3.1.1 Ket cdu he thong ao nudi Qua bang cho thay nhieu ho dan khong chu ve ao Pdng, ty le ho co ao POng rat thap chiem cao nhat chi 46,7% P TCX dPc +TTCT + TS va TCX thppng + TTCT + TS nen nhieu ho dan gap nhieu kho khan nuoi Cac ho nuoi da phan deu tan dung dien tich ao nuoi san co gia dinh Theo Phu Vinh Thai va cong tac vien (2015), POng tom giong thPi gian dau trPPc nu i de thuan tien viec cham soc va ngan ngPa dich benh gop phan nang cao ty le song va nang suat mo hinh nuoi Cac ho nuoi sP dung phan lPn dien tich lam ao nuoi nen dien tich ao nuoi kha lPn, nuoi TCX dPc + TTCT + TS co dien tich ao trung binh cao nhat len den 2,5 ha/ao vPi sau mPc npPc la 1,3 m Tap chi Khoa hoc va Cong nghe Nong nghiep Viit Nam - So 05(126)/2021 Do sau mile nUPc nghien ciiu phu hop vPi sii nghien ciiu cua Nguyen Van Hao va cong tac vien (2000), sau miic nUPc nuoi TCX tii 0,7 -1 m hay sau trung binh tii - 1,4 m, sau dupe khuyen khich la -1,2 m Theo Nguyen Thanh Long va Huynh Van Hien (2015), nuoi TTCT of Ca Mau co dien tich va so lUdng ao nho hon nhieu vPi 0,22 ha/ ao vPi so ao nuoi trung binh moi ho 2,35 ao/ho, nhUng so v i nuoi TS Soc Trang thi nho hon vPi 3,73 ha/ho (Nguyen Thanh Long va Nguyen Thanh PhiiOng, 2010) Qua cho thay, da phan ngUPi dan nuoi tom til phat, chila co ke hoach cu the, chi nuoi theo cam quan va kinh nghiem, sd dung he thong ao nuoi slin co Bang Ket cau he thong lierng nuoi Chi tieu TCX dpc + TTCT TCX thiidng + TTCT TCX dpc + TTCT + TS TCX thiidng + TTCT + TS - Ty le ho co ao lidng (%) 33,9 14,3 46,7 46,7 - So liipng (ao/ho) 1,2 ± 0,5 ,0 ± 0,0 1,3 ± 0,5 1,0 ± 0,0 - Dien tich (ha/ao) 0,4 ± 0,7 ,1 ± 0,0 0,6 ± 0,4 0,1 ± 0,1 - Dp sau mpe niidc (m) 1,3 ± 0,2 1,5± 0,0 1,2 ± 0,1 1,3 ± 0,2 - So liidng (ao/ho) 1,3 ± 0,6 1,0 ± 0,0 1,6 ± 0,8 1,1 ± 0,4 - Dien tich (ha/ao) 1,6 ± 0,9 2,4 ± 2,0 2,5 ± 0,9 2,1 ± 1,3 - Dp sau mpe niidc (m) 1,4 ± 0,2 1,2 ± 0,2 1,3 ± 0,1 1,3 ± 0,2 Ao lidng Ao nuoi Ghi chu: Cac so lieu bdng the hien gid tri trung binh va lech chuan 3.1.2 Chongiong tinh phu thuoc vao so liipng trai giong tinh Theo nghien ciiu cua Ho Thanh Thai (2011) nguon goc giong TCX tinh 83,3% va ngoai tinh 16,7% Theo Phaun Minh Tii (2015), nguon goc giong TCX tinh 90,2% va ngoai tinh 9,8% Nhin chung, nguon giong rat da dang, chila diipc kiem benh Cac ho nuoi chila quan tam den chat liipng giong, chi chon giong bang cam quan, chiia chu y den van de xet nghiem benh Cac ho nuoi cung chiia quan tam den nguon goc giong, chu yeu chon cac cd sd lidng tai dia phiiong khong ro nguon goc Ben canh do, cac ho nuoi chon giong ngoai Bang Con giong TCX d u e+ TTCT TCX thUPng + TTCT TCX due + TTCT + TS TCX thUPng + TTCT + TS -TTCT 17,0 57,1 33,3 93,3 - TCX dpc 11,9 - 20,0 - Chi tieu Trong tinh (%) - TCX thudng - 14,3 - 40,0 -TS - - 26,7 60,0 -TTCT 83,1 42,9 66,7 66,7 -TCX due 88,1 - 80,0 - Ngoai tinh (%) - TCX thupng - -TS 60,0 85,7 - 73,3 40,0 Ghi cM: Cac so lieu bdng the hien gid tri ty le % 123 Tap chiKhoa hoc va Cong nghe Ndng nghiep Viet Nam - So 05(126)/2021 3.1.3 Ky thudt Udng giong Ket qua khao sat cho thay thdi gian Udng cua tta g doi tUdng nuoi khac nhau, doi vdi TTCT Udng til 15 den 30 ngay, TCX til den thang va TS ildng toi da 25 Thdi gian Udng khac tilng doi tildng nuoi lien quan den toe tang trUdng cua loai So hldng ao ildng trung binh ao/ho, ao ildng sd dung tilng doi tUdng thdi gian ngan va lich ildng cua cac doi tiidng nuoi khac nen cac ho tan dung ao ildng lien tiep het doi tUdng den doi tUdng khac Moi nam trung binh m i ho dan ildng TTCT til den vu/nam va TCX chi co vu/nam the hien ro d mo hinh nuoi TCX dilc + TTCT va TCX thildng + TTCT, doi vdi mo hinh TCX due + TTCT + TS va TCX thildng + TTCT + TS thi ho dan chu d TTCT va TS nhieu hdn bdi vi d mo hinh da phan ho dan nuoi TTCT khong dat hieu qua cao nen ho nuoi TS de cai thien hieu qua tai chinh nen TTCT va TS trung binh moi ho nuoi ildng khoang vu/nam va TCX chi co vu/nam Bang Cac khia canh ve ky thuat Udng giong Chi tieu Ty le ho ildng (%) -TTCT - TCX dilc - TCX thudng -TS Thdi gian Udng (ngay/vu) -TTCT -TCX due - TCX thudng -TS So vu Udng (vu/nam) -TTCT -TCX due - TCX thudng -TS Rich cd giong Udng (PL) -TTCT -TCX due - TCX thudng -TS Mat dQ Udng (PL/m2) -TTCT - TCX due - TCX thudng -TS TCX due + TTCT TCX thudng + TTCT TCX due + TTCT + TS TCX thudng + TTCT + TS 27,1 30,5 0,00 26,7 40,0 20,0 - - - 14,3 - 21,1 + 11,6 67,5 ±12,9 - 0,00 3,3 ± 0,9 2,3 ± 0,8 0,0 - 11,3 ± 1,0 12,6 ± 1,9 26,7 26,7 26,7 23,8 + 7,5 46,7 ± 25,8 16,7 ± 2,9 - - 90,0 - - 22,5 ± 6,5 33,8 ± 18,9 25,0 ± 4,1 - 1,8 ± 0,9 1,7 ± 0,8 2,3 ± 0,58 - 2,0 - - 2,3 ± 0,5 ± 0,0 2,0 ± 0,0 11,5 ±1,0 13,0 ± 1,6 10,7 ± 1,2 _ 0,0 - - 15,0 - 12,8 ± 1,5 80,1 ± 69,1 0,0 146 ± 180 36,9 ± 29,7 - 42,3 ± 29,5 - - - - 45,0 - - - 92,5 ± 65,0 1,0 ± 1,2 11,5 ± 1,0 11,0 83,3 ± 16,5 53,3 ± 35,3 59,8 ± 24,4 Ghi chu: Cdc so lieu bang the hien gia tri trung binh, lech chuan va ty le % Do dien tich ao ildng nho (Bang 3) nen cac ho m oi tha so lildng giong ildng nhieu de dam bao dn giong tha nuoi nen mat ildng trung binh doi vdi TTCT va TS the hien ro mo hinh TCX dilc + TTCT + TS (TTCT: 146 PL/m2, TS: 92,5 PL/m2) Con doi vdi mat ildng TCX cao nhat cung len den 04 53,3 PL/m (TCX thildng + TTCT + TS) Cac ho nuoi chila chu nhieu ve viec ildng giong, so ho co ildng giong chiem ty le thap nen dan den mo hinh nuoi khong dat hieu qua cao, co ho bi thua 16 Tap chi Khoa hoc va Cong nghe N ong ngh& p Viet Nam - So 05(126)/2021 3.1.4 Ky thuat nudi Qua bang cho thay cac ho nudi quanh nam do, TTCT nuoi tii den thang vdi mat trung binh cao nhat cung chi 8,2 PL/m (TCX ddc + TTCT) va thap nhat la 4,9 PL/m (TCX thddng + TTCT) Til den thang nuoi d i vdi TCX ddc va TCX thddng trung binh moi ho tha cao nhat 3,4 PL/m TCX ddc (TCX ddc + TTCT) va thap nhat la 2,1 PL/m TCX thddng (TCX thddng + TTCT) thap hcfn so vdi nghien cdu cua Le Quoc Viet va Nguyen Anh Tuan (2006) vdi mat TCX la - con/m2nuoi thang Td den thang nuoi doi vdi TS vdi mat d trung binh cao nhat cung chi 1,9 PL/m (TCX thddng + TTCT + TS) So vu trimg binh moi ho cao nhat la 3,3 vu/nam doi vdi TTCT d mo hinh TCX ddc + TTCT, dao dong td - vu/nam doi vdi TTCT; TCX ddc va TCX thddng trung binh cao nhat la 2,1 vu/nam (TCX ddc + TTCT) va 1,3 vu/nam (TCX ddc + TTCT + TS) doi vdi TS so vu nudi gan nhd bang vdi TTCT dao dong td - vu/nam cao nhat d mo hinh TCX thddng + TTCT + TS (2,3 vu/nam) Bang Cac khia canh ky thuat nuoi TCX ddc + TTCT TCX thddng + TTCT TCX ddc + TTCT + TS TCX thddng + TTCT + TS -TTCT 73,5 ± 12,2 77,1 ± 10,4 66,0 ± 9,5 84,0 ± 14,8 -TCX ddc 150 ± 43,1 - 169,0 ± 32,3 - - TCX thddng - - 188 ± 13,7 -TS - 171± 323 - 82,2 ± 25,9 103 ± 14,9 -TTCT 3,3 ± 0,9 2,4 ± 0,8 1,3 ± 0,6 1,9 ± 0,5 -TCX ddc 2,1 ± 0,5 - 1,3 ± 0,6 Chi tieu Thdi gian nudi (ngay/vu) So vu nudi (vu/nam) - - TCX thddng - 1,1 ± 0,4 - -TS - - 1,8 ± 0,9 2,3 ± 0,7 -TTCT 8,2 ± 3,4 4,9 ± 1,9 5,4 ± 1,5 5,2 ± 3,1 -TCX ddc 3,4 ± 1,4 - 2,4 + 1,1 - - TCX thddng - 2,1 ± 0,4 - 3,3 ± 1,2 -TS - - 1,6 ± 0,9 1,9 ± 0,8 - TTCT 12,0 ± 1,1 12,4 ± 1,1 12,8 ± 1,4 12,3 ± 0,9 - TCX ddc 14,0 ± 1,9 - 13,7 ± 1,6 1,0 ± 0,0 Mat nudi (PL/m2) Rich cd gidng nudi (PL) 14,5 ± 1,2 - 13,6 ± 1,6 - TCX thddng - -TS - - 12,5 ± 1,2 Lddng thdc an (tan/ha/vu) 03 ± 03 0,4 ± 0,2 0,8 ± 0,3 0,6 He sd thdc an 1,4 ± 1,2 + 0,4 1,3 ± 0,4 1,4 ± 0,4 - 13,1 ± 1,51 ± 0,1 Ghi chu: Cac so lieu bang the lain gid tri trung binh, lech chuan Cac ho nuoi da phan sd dung thdc an vien, cho an lan/ngay (sang va chieu) Ben canh do, mot so it ho khong co sd dung thdc an cong nghiep ma chi de tom an thdc an tv£ nhien dien hinh nhd is TCX thddng + TTCT co ty le ho khong sd dung thdc an chiem 14,2% va mo hinh chiem 26,7% Cac ho nuoi chu yeu cho TTCT va TS an Liicfng thdc an cao nhat la is TCX ddc + TTCT va TCX ddc + TTCT + TS (0 ,8 tan/ha/vu) va thap nhat la 0,4 tan/ha/vu d TCX thddng + TTCT va hinh thdc cho an la rai deu khap ao chd khong dung san an chinh vi the rat kho de kiem soat ham lddng thdc an cua tdm He so thdc an trung binh cao nhat la 1,4 (TCX ddc + TTCT va TCX thddng + TTCT + TS) va thap nhat la 1,2 (TCX thddng + TTCT) 125 Tap chiKhoa hoc va Cong nghe Nong nghiip Viet Nam -So05(126)/2021 3.1.5 N angsudt va ty le song Ket qua phan tich d bang cho thay, TCX due + TTCT co nang suat trung binh cao nhat vdi 1,3 tan/ha/vu TTCT 0,6 tan/ha/vu chiem 56,8% ty le song va TCX due 0,7 tan/ha/vu chiem 23,0% vdi kich cd thu hoach la 98,8 con/kg doi vdi TTCT va 14,1 con/kg doi vdi TCX due NgUdc lai, thap nhat la TCX thudng + TTCT vdi nang suat trung binh la 0,6 tan/ha/vu dd TTCT 0,3 tan/ha/vu vdi kich cd thu hoach 95,7 con/kg va TCX thiidng 0,3 tan/ha/vu d kich cd trung binh la 20,0 con/kg So vdi nghien cUu Huynh Kim Hiidng va cong tac vien (2018) thi thap hon, nuoi TCX vdi mat con/m sau - thang nuoi co nang suat trung binh la 8 kg/ha/vu Trong do, ty le song cua TTCT chiem 35,3% va TCX thiidng la 15,5% Hau het cac ho nuoi deu ban cho thUdng lai Viec ban cho thiidng lai co nhieu thuan ldi nhii chiu trach nhiem thu hoach tom va viec thoan bang tien mat cung de dang Bang Thu hoach, ty le song va nang suat sau mot vy nuoi TCX due + TTCT TCX thudng + TTCT TCX dUc + TTCT + TS TCX thudng + TTCT + TS -TTCT 49,2 71,4 46,7 53,3 -TCX dUc 23,7 - 26,7 - - TCX thudng - 71,4 - 33,3 -TS - - 60,0 73,3 - TTCT 98,8 + 10,1 95,7 ± 7,87 93,0 ± 14,9 98,0 ± 16,1 -TCX due 14,1 ±2,1 15,6 ± 2,0 - Noi dung Ty le ho thu tia (%) Cd thu hoach (con/kg) - TCX thudng 20,0 ± 5,0 - 18,3 ± 3,1 - - 36,7 ± 4,9 36,3 ± 4,8 -TTCT 56,8 ± 18,1 35,3 ± 9,2 33,2 ± 22,0 44,2 ± 13,7 -TCX due 23,0 ± 9,2 - 14,7 ± 6,93 - - 14,4 ± 6,1 21,5 ± 13,4 23,5 ± 16,7 -TS Ty le song (%) - TCX thudng - -TS - Tong nang suat (tan/ha/vu) 1,3 ± 0,4 -TTCT 0,6 -TCX due 0,7 ± 0,3 ± 0,2 - TCX thudng - -TS - 15,5 ± 7,9 - 0,6 ± 0,2 0,3 + 0,2 ± 0,1 0,9 ± 0,2 0,5 ± 0,5 0,3 ± 0,1 0,5 ± 0,2 - 1,2 0,3 ±0,1 0,4 ± 0,1 0,2 ±0,1 0,2 ± 0,1 Ghi chu: Cac so lieu bang the hien gia tri trung binh, lech chuan va ty le % 3.2 Hieu qua tai chinh Qua ket qua phan tich d bang cho thay hieu qua tai chinh cua mo hinh cd sd chenh lech ldn O TCX due + TTCT co tong thu la 160 trieu dong/ ha/vu va ldi nhuan 98,4 trieu dong/ha/vu cao hdn mo hinh lai Ve tong chi phi thi TCX due + TTCT + TS cao nhat la 73,3 trieu dong/ha/vu va thap nhat la TCX thudng + TTCT (35,5 trieu dong/ ha/vu) Ty le ho bi 16 TCX due + TTCT la 1,7%, lit TCX due + TTCT + TS la 6,7% TCX thudng + TTCT va TCX thudng + TTCT + TS khong cd ho bi 16 Ve ty suat ldi nhuan thi TCX dUc + TTCT la 1,7 lan cao hdn so vdi mo hinh lai Qua ket qua khao sat cho thay mo hinh TCX dUc + TTCT co ket qua tot nhat vdi ty le song cua tom, nang suat mo hinh va hieu qua tai chinh dat cao nhat so vdi cac mo hinh lai Tap chi Khoa hoc va Cong nghe Nong nghiep Viet Nam - 05(126)/2021 Bang Hieu qua tai chinh cua mo hinh nu6 i TCX due + TTCT TCX thUdng + TTCT TCX dUc+ TTCT + TS TCX thUdng + TTCT + TS Tong chi (trieu dong/ha/vu) 61,6 ± 19,8 35,5 ± 15,6 73,3 ± 26,0 44,8 ± 15,2 Tong thu (trieu dong/ha/vu) 160 ± 64,8 68,6 ± 22,8 148 ± 62,4 104 ± 23,1 Ldi nhuan (trieu dong/ha/vu) 98,4 ± 56,1 33,1 ± 11,3 72,1±49,0 56,8 ± 25,7 Ty suat ldi nhuan (lan) 1,7 ± 0,8 1,1 ±0,4 1,0 ± 0,7 1,3 ± 0,9 Ty le ho bi thua 16 (%) 1,7 0,0 6,7 0,0 N6 i dung Ghi chu: Cdc so lieu bang the hien gia tri trung binh, lech chuan IV KET LUAN VA DE NGHI 4.1 Ket luan Nuoi TCX due + TTCT co tong nang suat cao nhat la 1,3 tan/ha/vu (TTCT la 0,6 tan/ha/vu va TCX due la 0,7 tan/ha/vu); ldi nhuan va ty suat ldi nhuan cao nhat (98,4 trieu dong/ha/vu, 1,7 lan) Nuoi TCX due + TTCT mang lai hieu qua tot hon so vdi cac mo hinh lai 4.2 De nghi Can trien khai thUc nghiem mo hinh nuoi TCX due + TTCT de lam co sd trUdc nhan rang mo hinh d vung U Minh ThUdng va cac dia phuong lan can tAi l ie u t h a m k h a o Ho Thanh Thai, 2011 Khdo sat hien trang thUc nghiem nuoi tom cdngcanh (Macrobrachium rosenbergii) tren ruong lua ket hdp tai huyen Hong Dan tinh Bac Lieu Luan van cao hoc NTTS, Khoa thuy san, TrUdng Dai hoc Can Thd Huynh Kim HUdng, Tran Ngoc Hai, D6 Thi Thanh HUOng va Le Quoc Viet, 2018 Phan tich khia canh ky thuat va hieu qua tai chinh cua mo hinh nuoi tom cang xanh Macrobrachium rosenbergii (De man, 1879) nUdc lo tinh Tra Vinh Tap chi Khoa hoc Dai hoc Tra Vinh So 29: 91-101 Le Qu c Viet va Nguyen Anh Tuan, 2006 Khao sat hien trang nuoi tom cang xanh (Macrobrachium rosenbergii) ao dat d tinh Vlnh Long Tap chi Khoa hoc Dai hoc Can Thd 2006:280-290 Nguyin Thanh Long va Huynh Van Hien, 2015 Phan tich hieu qua ky thuat va tai chinh cua m hinh nuoi tom the chan trang d tinh Ca Mau Tap chi Khoa hoc Dai hoc Can Thd, So 37: 105-111 Nguyen Thanh Long va Nguyin Thanh PhUdng, 2010 Phan tich khia canh kinh te va ky thuat cua m hinh nuoi tom su (Penaeus monodon) tham canh d tinh Soc Trang Tap chi Khoa hoc Dai hoc Can Thd, So 14: 119-127 Nguyen Thanh PhUcfng va Tran Ngoc Hai, 2004 Giao trinh ky thuqt sdn xuat giong va nuoi giap xdc Nha xuat ban Dad hoc Can Thd: 160 trang Nguyen Van Hao, Nguyin Quang Minh va Doan Thanh Thao, 2000 Nuoi tom cangxanh edng nghiep quy mo ho gia dinh tai Tra Vinh Sd Khoa hoc Cong nghe va Moi triidng tinh Tra Vinh: 56 trang Pham Minh Tii, 2015 ThUc nghiem mo hinh nudi TCX (Macrobrachium rosenbergii) - Ida ludn canh vdi tom su (Penaeus monodon) d tinh Bqc Lieu Luan van cao hoc TrUdng Dai hoc Can Thd Phu Vinh Thai, TrUdng Hoang Minh, Tran Hoang Tuan va Tran Ngoc Hai, 2015 So sanh hieu qua san suat giQa nuoi tom su va tom the chan trang luan canh vdi lua d tinh Kien Giang Tap chi Khoa hoc Dai hoc Can Thd Phan B: Nong nghiep, Thuy sdn va Cong nghd Sinh hoc, So 41: 111-120 Quang Trong Thao, 2017 Dien tich tom cang xanh tang manh d Kien Giang https:/Znongnghiep vn/kien-giang-dien-tich-tom -cang-xanh-tangmanh-dl98131.html Truy cap 13/7/2020 Tran Ngoc Hai, Chau Tai Tao va Nguyin Thanh PhUdng, 2017 Giao trinh ky thuat sdn xuat giong va nudi giap xdc Nha xuat ban Dai hoc Can Thd: 226 trang Farming status o f freshwater prawn (M a cro b ch iu m rosen bergii) combined with whiteleg shrimp (L ito p en a eu s va n n a m ei) and tiger prawn (P en a eu s m o n o d o n ) in Kien Giang province Ly Van Khanh, Nguyen Thi Thuy Nga, Ngo Van Ut Abstract Study on technical and financial status of the models farming freshwater prawn with white leg shrimp and tiger shrimp to choose the best model in U Minh Thuong area, Kien Giang province The study was conducted from 127 Tap chi Khoa hoc va C&ng nghe Nong nghi$p Viet Nam - 56 05(126)/2021 March to May 2020 through direct interview of 96 households raising freshwater prawn and white leg shrimp and Tiger shrimp in U Minh Thuong area, Kien Giang province The results showed that the highest yield was achieved when farming the freshwater prawn males with the whiteleg shrimps (total yield was 1.3 tons/ha/crop, of which, the yield of the freshwater prawn males was 0.7 tons/ha/crop and of whiteleg shrimps was 0.6 tons/ha/crop), the lowest yield was recorded when farming popular freshwater prawns with whiteleg shrimps (total yield was 0.6 tons/ha/crop, of which, the yield of popular freshwater prawns was 0.3 tons/ha/crop and of whiteleg shrimps was 0.3 tons/ha/crop) The highest total farming cost was recorded with 73.3 million VND/ha/crop when farming the freshwater prawn males with the whiteleg shrimps and the tiger prawns and the lowest cost was recorded with 35.5 million VND/ha/crop when farming popular freshwater prawns with the whiteleg shrimps The highest revenue was 160 million VND/ ha/crop when farming the freshwater prawn males with the whiteleg shrimps and the lowest one was 68.6 million VND/ha/crop when farming the popular freshwater prawns with the whiteleg shrimps The highest profit was recorded when farming the freshwater prawn males with the whiteleg shrimps (98.4 million VND/ha/crop, margin profit of 1.7 times) and the lowest margin profit of 1.0 was observed when farming the freshwater prawn males with the whiteleg shrimps and the tiger prawns Keywords: Freshwater prawn, White leg shrimp, Tiger prawn, combined farming, Kien Giang province Ngay nhan bai: 06/4/2021 Ngay phan bien: 20/4/2021 128 Ngddi phan bien: TS Nguyen Nhtit Ngay duyet dang: 27/4/2021 ... cPu “Hien trang nuoi tom cang xanh ket hpp tom the chan trang va tom su tai tinh Kien Giang? ?? dope thpc hien nham chon mo hinh tot nhat vung U Minh Thiipng tinh Kien Giang II PHUONG PHAP NGHIEN... tom cangxanh edng nghiep quy mo ho gia dinh tai Tra Vinh Sd Khoa hoc Cong nghe va Moi triidng tinh Tra Vinh: 56 trang Pham Minh Tii, 2015 ThUc nghiem mo hinh nudi TCX (Macrobrachium rosenbergii). .. tinh Kien Giang Tap chi Khoa hoc Dai hoc Can Thd Phan B: Nong nghiep, Thuy sdn va Cong nghd Sinh hoc, So 41: 111-120 Quang Trong Thao, 2017 Dien tich tom cang xanh tang manh d Kien Giang https:/Znongnghiep