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โครงการหนังสืออิเล็กทรอนิกส์ด้านการเกษตร เฉลิมพระเกียรติพระบาทสมเด็จพระเจ้าอยู่หัว

'&B ( : / , . 8 7
&*
Table 3.16 Longan Output Proportion in Geographic Regions and by Major
'&B ( : / , . 8 7
Varieties 12 &*

$ -(A *C*&
Source:: DOAE 2021
$ -(A *C*&
'&E $ 7 (
&
Table 3.17 Seasonal Variation of Longan Output in Thailand 13
'&E $ 7 (
&

Source:: DOAE 2021
$ -(A *C*&
$ -(A *C*&
Parameter

The technical parameters for longan production in Thailand (Table 3.18) are

based on findings of the field trip observations by the researcher team. The
1 5 '&G6 fi
production is highly responsive to price signals with about a 3-year time lag
fi % , 1' , %
1 5 '&G6 fi
(as new trees may carry fruit after 3 years using the air laying method of
fi % , 1' , %
) @, 1 5 ) 1 , , ,
) @, 1 5 ) 1 , , ,
, 1 6' ) 1 *C*& % 4
breeding). The low farm gate price in 2021 is close to the average cost, which
) 1 '
, 1 6' ) 1 *C*& % 4
dims the future of longan.
) 1 '
$(* 1 1 , 1 , 1 BC , ' 2
SO2 fumigation may extend the shelf life of longan from 3 days to more than
$(* 5 % C 16 1 %
$(* 1 1 , 1 , 1 BC , ' 2
60 days. But the concern of SO2 residual (above the standard 30 ppm) reduces
% @ @% ' ( % )
$(* 5 % C 16 1 %
, 14 ) 1 , 3 1 *C , '
% @ @% ' ( % )
the competitiveness of Thai longan vis-a-vis the fresh ones in China. One
, 14 ) 1 , 3 1 *C , '
alternative is to use the new cold storage system, which may keep the fruits
fresh for more than 20 days.
12 & * Data from database of Department of Agricultural Extension (DOAE) of Ministry of Agriculture and
- 1 - 1 A 5-(A 6 . , A % 5.(A 6
Cooperatives (MOAC) https://opendata.doae.go.th
bb ' ' '
& *
- 1 - 1 A 5-(A 6 . , A % 5.(A 6
bb ' ' '
- 1 - 1 A 5-(A 6 . , A % 5.(A 6
13 & Data from database of Department of Agricultural Extension (DOAE) of Ministry of Agriculture and
bb ' ' '
&
Cooperatives (MOAC) https://opendata.doae.go.th
- 1 - 1 A 5-(A 6 . , A % 5.(A 6
bb ' ' ' & *
& *
84 Production