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Vegetables

Konjac

Amorphophallus konjac

Konjac, also known as konjac yam or devil's tongue, is a perennial plant native to Asia. It is characterized by its large tuber, which is rich in glucomannan, a soluble dietary fiber. The plant has a unique flower structure and can grow up to 1 meter in height. Konjac is primarily used in food products, dietary supplements, and traditional medicine due to its health benefits, including weight management and cholesterol reduction.

Calculate System for Konjac
400.00–600.00mm
Water Need
120 days
Season
30.00–60.00cm
Root Depth
25,000 kg/ha
Yield
20,000
Plants/ha

Growth Stages

Season: Mar – Aug (120 days)

Initial
Kc 0.400
30 days
Development
Kc 0.700
40 days
Mid-Season
Kc 1.000
60 days
Late
Kc 0.800
30 days

Konjac requires careful management of soil moisture and temperature. Varieties include 'Miyazaki' and 'Kumamoto', which may have different growth characteristics.

Water Requirements

Season Total: 400.00600.00 mm
Water Stress Sensitivity: High
Salt Tolerance: Moderate
Water Productivity: 15.500 kg/m³

Recommended Methods

Drip Irrigation90.00%Fixed Sprinkler70.00%

Soil Compatibility

Optimal pH range: 6.0 – 7.5

Sandy Loam
AWC100.00mm/m
Drainagegood
Drainage: Well-drained soils preferred
Organic Matter: 2.00%
Soil should be rich in organic matter. Incorporate compost or well-rotted manure before planting.

Climate Compatibility

Temperature range: 15.0°C – 30.0°C

Temperate Continental
ETo: 1.006.00 mm/day
Temp: -20.0°C – 30.0°C
Frost: high
Mediterranean
ETo: 3.007.00 mm/day
Temp: 5.0°C – 35.0°C
Frost: low
Frost Tolerance: Low frost tolerance
Heat Tolerance: Moderate heat tolerance
Protect plants from frost during early growth stages. Mulching can help retain soil moisture and regulate temperature.

Planting Layout

100.00cm
Row Spacing
50.00cm
Plant Spacing
20,000
Plants per ha

Nutrient Requirements (kg/ha)

Nitrogen (N)150 kg/ha
Phosphorus (P)60 kg/ha
Potassium (K)180 kg/ha
40
Calcium (Ca) kg/ha
25
Magnesium (Mg) kg/ha
20
Sulfur (S) kg/ha
Schedule: Apply nitrogen in 3 splits during growing season
Organic Matter: 2-3% organic matter recommended

Yield Information

25,000
kg/ha
2.500
kg/plant
0.450
Harvest Index
Quality Factors: Size, color, sugar content

Design Your Konjac Irrigation System

Use our free calculators to plan water requirements, spacing, and system costs for your Konjac field.

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Related Guides

Introduction to Growing and Irrigating Konjac

Konjac, also known as Amorphophallus konjac, is a perennial plant native to East Asia. It is widely cultivated for its starchy corm, which is used in various food products such as noodles, jelly and dietary supplements. Growing konjac can be a profitable venture due to its high demand and economic value. However, to…

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