104
It is necessary to cover the substrate beds to secure the moisture content for 2–3 days.
Water may be sprinkled upon seeing the fungus grow on most of the beds. Organic
fertilizer, such as chicken manure or cow dung, is added to the substrate at a rate of
about 0.5–1.5 kg m
−2
to increase the nutrient uptake by the mushrooms. All materials have to be sterilized before adding them to the substrate.
6.4.3 Case Study of Cost-Benefits for Growing Indoor
and Outdoor Mushroom
We conducted assessments for indoor and outdoor mushroom growing in the
Mekong River Delta (MRD) of Vietnam in 2018 that resulted in the cost-benefit
comparison shown in Table 6.4. For the outdoor practice, total input cost was about
1.28 $US kg
−1
of mushroom produced and 1.23 $US m
−2
of land used. It comprises
the main component costs of rice straw (40%), labor (23%), chemical inputs (11%),
and the rest for land use, depreciation of net and pump, and watering. On the other
hand, for the indoor practice, the total input cost was 1.37 $US kg
−1
of mushroom
produced and 10.79 $US m
−2
of.
land used. The indoor practice cost breakdown was depreciation of growing
house and facilities, 44%; rice straw, 31%; labor, 7%; and the rest for use, depreciation of net, pump, and growing house (for indoor scenario), and watering. Net profit
accounted for 1 kg of mushroom produced was the same for both indoor and outdoor practices at 0.5–0.6 $US kg
−1
. Whereas, accounting for a square meter of land
Table 6.4 Comparing cost-benefits between outdoor and indoor RSM growing practices in MRD
Parameters
Outdoor
Indoor
$US kg
−1 of
mushroom
$US m
−2 of
land used
$US kg
−1 of
mushroom
$US m
−2 of
land used
Inputs
Land used (rental)
0.15
0.04
0.16
0.35
Rice straw
0.51
0.38
0.54
3.33
Net, pump, depreciation of
growing house (indoor only)
0.03
0.54
0.03
4.76
Lime, fertilizer and pesticide
0.12
0.07
0.13
0.60
Spawns
0.14
0.10
0.15
0.83
Watering (power consumption) 0.03
0.02
0.03
0.21
Labor
0.30
0.08
0.32
0.71
Total inputs
1.28
1.23
1.37
10.79
Outputs
Mushroom
1.67
1.67
1.78
14.58
Spent rice straw
0.15
0.10
0.16
0.83
Total outputs
2.35
2.29
2.51
20.04
Net profit
0.5
0.6
0.5
4.6
L. V. Thuc et al.
It is necessary to cover the substrate beds to secure the moisture content for 2–3 days.
Water may be sprinkled upon seeing the fungus grow on most of the beds. Organic
fertilizer, such as chicken manure or cow dung, is added to the substrate at a rate of
about 0.5–1.5 kg m
−2
to increase the nutrient uptake by the mushrooms. All materials have to be sterilized before adding them to the substrate.
6.4.3 Case Study of Cost-Benefits for Growing Indoor
and Outdoor Mushroom
We conducted assessments for indoor and outdoor mushroom growing in the
Mekong River Delta (MRD) of Vietnam in 2018 that resulted in the cost-benefit
comparison shown in Table 6.4. For the outdoor practice, total input cost was about
1.28 $US kg
−1
of mushroom produced and 1.23 $US m
−2
of land used. It comprises
the main component costs of rice straw (40%), labor (23%), chemical inputs (11%),
and the rest for land use, depreciation of net and pump, and watering. On the other
hand, for the indoor practice, the total input cost was 1.37 $US kg
−1
of mushroom
produced and 10.79 $US m
−2
of.
land used. The indoor practice cost breakdown was depreciation of growing
house and facilities, 44%; rice straw, 31%; labor, 7%; and the rest for use, depreciation of net, pump, and growing house (for indoor scenario), and watering. Net profit
accounted for 1 kg of mushroom produced was the same for both indoor and outdoor practices at 0.5–0.6 $US kg
−1
. Whereas, accounting for a square meter of land
Table 6.4 Comparing cost-benefits between outdoor and indoor RSM growing practices in MRD
Parameters
Outdoor
Indoor
$US kg
−1 of
mushroom
$US m
−2 of
land used
$US kg
−1 of
mushroom
$US m
−2 of
land used
Inputs
Land used (rental)
0.15
0.04
0.16
0.35
Rice straw
0.51
0.38
0.54
3.33
Net, pump, depreciation of
growing house (indoor only)
0.03
0.54
0.03
4.76
Lime, fertilizer and pesticide
0.12
0.07
0.13
0.60
Spawns
0.14
0.10
0.15
0.83
Watering (power consumption) 0.03
0.02
0.03
0.21
Labor
0.30
0.08
0.32
0.71
Total inputs
1.28
1.23
1.37
10.79
Outputs
Mushroom
1.67
1.67
1.78
14.58
Spent rice straw
0.15
0.10
0.16
0.83
Total outputs
2.35
2.29
2.51
20.04
Net profit
0.5
0.6
0.5
4.6
L. V. Thuc et al.