Page 511 - Ebook HTKH 2024

negative effects of climate change
Urban residents have easy access to 50 89 91

technology and gardening techniques thanks
to the media and the attention of
educational institutions.
Vertical gardens and walled garden 27 69 90
technology have been known and applied
by urban people

The findings from the trial greenhouse yielded positive results for both the
productivity, carbon dioxide absorption capacity and saving water of vertical gardens
(Tables: 2-8). The tested model was designed to be suitable for urban gardens in city
centers and for households with terraces, balconies or skylights. In addition to providing
fresh vegetables, this garden model not only improves the look of urban dwellings but

also benefits the ecological environment by the carbon fixation ability of the fresh
vegetable cover.
Findings from a survey of farming businesses (cooperatives, cooperative alliances
and individual farm enterprises) in suburban areas show that more than 90% of the
surveyed businesses already apply technology to agricultural production, including
large-scale high-tech agriculture systems. There is every reason to expect this
investment in high-technology solutions in the urban fringe to expand as the Department
of Agriculture and Rural Development has recently started collaborating with relevant

urban districts to incentivize the restructuring of urban agriculture at local scale to
address fragmentation and production capacity in the period 2022–2025 in line with the
city’s strategic vision for agriculture to 2050 (HCMC People’s Committee, 2021).
3.2. Effect of fertilizer type on vegetable yield
The results of evaluating the effect of fertilizer type on the yield of leafy vegetables
grown in greenhouses (hydroponically grown on horizontal troughs) and in the field

(Table 2 - 3) show that: The Fert.2 treatment (50% nano organic fertilizer and 50% NPK
15-15-15+TE) achieved the highest yield in both greenhouse and field cultivation for all
5 leafy vegetable varieties (water spinach, Malabar spinach, Chinese cabbage, green
mustard and amaranth), higher and statistically significantly different from the other 2
treatments (except for amaranth; amaranth grown both indoors and outdoors gave results
that were not statistically significantly different between treatments). In most vegetable
varieties, the yield results of the Fert.2 and Fert.3 treatments did not have statistically

significantly different results.
Sensory: All experiments recorded healthy plants with fairly uniform growth rates.
In the experiment with 100% organic fertilizer, the leaves were evenly green and thicker.
At the same time, customers also preferred 100% organic vegetables even though they
were more expensive than vegetables grown with 100% inorganic fertilizer or a
combination of inorganic and organic fertilizers.

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