Page 515 - Ebook HTKH 2024

Table 6. Vegetable growing productivity per 1m of space - Vertical farming
2
and traditional farming
2
Average Yield (kg/m )
Vertical farming, in greenhouse Traditional farming, in the field
Commer Total Comme Total
Veg. 's Biomass cial Price, cost, Biomass rcial Price, cost,
name yield yield VND VND yield yield VND VND
Green
mustard 29.530 26.580 30,000 797,400 21.267 19.140 25,000 478,508
Bok
choy 33.730 30.360 30,000 910,800 27.704 24.934 25,000 623,340
Amarant
hs 33.600 30.240 30,000 907,200 16.407 14.766 25,000 369,158
Malabar
spinach 24.230 21.810 30,000 654,300 18.196 16.376 25,000 409,410

Swam
spinach 32.230 29.010 30,000 870,300 19.619 17.657 25,000 441,428
The total cost difference between vegetables grown in the Greenhouse and in the
field is 1,818,157.5 VND, however, the difference due to the higher productivity in
terms of quantity of the planting in greenhouse, which is 1,128,157.5 VND (this is a
good difference because the higher productivity leads to higher output. It means, the
cost increases due to increased output), the remaining difference is due to the higher
selling price of 5,000 VND compared to growing in the field, specifically 690,000
VND. This is not a good difference, so we need to try to find ways to reduce costs.

However, the cost difference due to the selling price is not high, only accounting for
38% of the total cost increase due to both quantity and price increase, so the benefits
that we get is from the growth in vertical type in the greenhouse.
3.5. Carbon absorption and oxygen emission ability of experimental plants
Table 7. Results of carbon absorption and oxygen emission of experimental plants
2
Greenhouse Absorb CO2 (kg/m /crop) Released O2 (kg/m /crop)
2
Green mustard 19.05 12.76
Bok choy 22.22 14.89
Brassica juncea 25.25 16.92
Butterhead Lettuce 16.52 11.07

Swam spinach 19.78 13.25
In the field
Green mustard 8.18 5.48
Bok choy 9.37 6.28

Brassica juncea 9.15 6.13
Butterhead Lettuce 6.82 4.57
Swam spinach 5.19 3.48

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