Khảo sát đánh giá chất lượng trái quýt đường (Citrus reticulata Blanco cv. Duong) ở Đồng Tháp, Hậu Giang và Vĩnh Long

KHOA Hpc CPN G NGHl

KHA O SA T DAIMH GIA CHAT LUQIXIG TRA I

OUYT DUblXIG {Citrus reticulata Blanco c^. Duong) O

DOIMG THAP , HA U GIAIMG V A Vil\IH LOIMG

Nguyen Thi TuyA Mai\ Trin Ngpc Phuong Anh^ Nguydn Bio V^

T6MTAT

Nhim so sanh chit lugng quyt Dudng {Citrus reticulata Blanco cv. Duong) vk dimh gid mpt so ydu t6 so cip

va thu cip anh hudng ddn chit luong trdi, dd tai khao sdt chit lugng trai dugc thyc hi$n d 3 huy^n ciia vung

d6ng bang song Ciiu Long (Lai Vung - Dong Thdp, Phyng Hi$p - Hau Giang vk Trk On - \^ h Long), m8i

huydn chpn 30 cay trSn goe ghep cam mat, mSi cay thu 3 tr^ dd khao sat tu6i chin ciia trii khoang 36 tuin

sau khi dau trai. Kdt qua cho diiy c6 st^ khde nhau chit lugng trai qu}^ Dudng cua 3 huydn dupe khao sdt,

trong dd quyt Dudng trdng d Lai Vung c6 chat lupng tdt nhit, mdu sic ciia v6 vk thit trdi vdng xanh, sdng

b6ng, kh6i lupng d^t 138,8 g, dudng kinh 63,4 mm, chidu cao Id 55,6 mm, chit lupng b£n trong ciia trdi ciia

dat y6u ciu: dp brix (9,1%), axit (0,207%), ti 1$ brix/axit (44:1), hdm lupng nude qud (90,1%), hdm lupng

vitamin C (13,9 mg.lOO ml'). s6 hOt/trdi trung binh (10.3). Dit trdng quyt d huy$n Lai Vung c6 hdm lupng

dinh du&ng khd cao: N (0.22%), P^Oj (0,17%), K (0.51 meq/100 g), Mg (4,86 meq/100 g) vd Ca (11,4 meq/100

g); ngudn gdc dit trdng mdi: tir rudng I6n vudn (90%), trinh dd thdm canh khd cao, bdn phdn can ddi vd ehd

trpng b6 sung P vd K cho cdy (105,4 g/cdy/ndm d6i vdi P vd 55,8 g/cdy/ndm ddi vdi K), chia nhidu dpt bdn

(8,13 lan/vu), tdng cudng sii dung huu ca cho cay (87,5% hd sii dung).

Ti khda: Quyt Dudng, chitlirpng, Ddng Thip, H$u Giang, Vmh Long￾LMdfBihl

Di^n tich trdng ciy cd mui a ddng bing sdng

Ciiu Long GDBSCL) cd hon 40.000 ha, chidm hon 60%

tong didn tich trdng cky cd miii trong ca nude CTrin

van Hau, 2008). Dae bidt li cSy quyt Dudng, loai cky

dn trai truydn thdng. rit ndi tidng vdi chit lu^ng rit

ngon du9c trdng nhidu nhit tai Ddng Thdp. H|iu

Giang vd Vihh Long. Theo Hofinan vi ctv., 1997, cic

ydu td chinh dd md ti chit lugog gdm hinh thiic bdn

ngoii, ciu tnic, huong vj, gii tri dinh dudng vi muc

dd an toin. Moi d$c tinh niy do nhidu ydu td ciu

thdnh. Cic dSc tinh chit lugoig trii sau thu ho?ich

A\sgc quydt dinh phin Idn tnrdc khi thu hoach.

Cd svr tuong quan giiia cic didu kidn sin xuit vi

chit lugng sau thu hoach ndu mudn dat dugc chit

lugng tdt nhit v^ on djnh tdi tay ngudi tidu thy.

Nhidu ydu td sin xuit cd thd anh hvrdng ddn chit

lugng sau thu hoach.

Cic ydu td so cip trudc diu hoach gdm khi hau,

dinh dudng vi cic chit didu hoi sinh trudng thuc vit

' Sd Ndng nghi?p vd Phdt triln ndng thdn Vihh Long.

^ Hpc vidn cao hpc khda 15, Khoa Ndng nghifp & Sinh hpc

U'ng dyng, Trudng Dji hpc Cin The.

' Khoa Ndng nghi?p & Sinh hpc Cng dyng, Trudng D?i

hpc Can Tha.

Cic ydu td thu c ^ bao gdm cic tic ddng noi

trdng, ehd dd tudi, lo^ dit, chit lugng gdc ghdp, che

mit,... (Winsor, 1979; Ferguson, 1980; Shear, 1980;

Sharpies, 1984; Beverly vi ctv., 1993; Hofman vi ctv.,

1997). d vimg i nhidt ddi vi nhidt ddi nhftng am hidu

vd inh hudng niy trdn trii edn rit it, trong khi dd d

vimg dn ddi da cd nhidu nghidn ciiu tdng quan vd cic

mdi tuong quan trudc vi sau thu hoach (Beverly vi

ctv., 1993). Vi viy dd t^: "Khio sit, dinh gii chit

Itrpng trii qu^ Dudng (Citrus reticulata Blanco cv.

Duong) d3 tinh Ddng Thip, H$u Giang vi Vihh Long"

dugc thyc hi^n nhim myc tidu so sinh chit lugog

c^yi Dudng {Citrus reticulata Blanco cv. Duon^ vi

dinh gii mdt sd ydu td so cip vi thu c ^ inh hudng

ddn chit lugng trii.

L PHUONG 1 ^ VA PHUDNG PIU P

1. Phuong tidn

Dja bin chpn khio sit ky thuat canh tic vi dinh

gii chit lugng trii quj^ Dudng dugc diuc hidn d 03

huydn thude 3 tinh vimg ddng bing sdng Cihi Long

(Lai Vung - Ddng Thip, Phijuig Hidp - H|iu Giang vd

Tri On - Viiih Long). Ba tinh cd cung ^du kidn khi

hiu nhi^t ddi gid mua, thude viing sinh thii Tky Nam

bd OE)BSCL), dit phii sa vi dit phdn chidm uu thd. Dit

trdng quyt Dudng thuOc dit 1|^ ly), giiu mim.

Kdt qui phin tich miu dit dai didn t^ ba huy^n

nhu sau (Bing 1):

N6N G NGHIfP VA PHAT TRIEN N6N G TH6N - KV 2 - THANG 7/2011 29