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(ipomoea aquatic Forsk.) is a fast-growing creeping herb with
succulent hollows stems rooting at the nodes in wet ground. The
leaves and stalk may either be green or purplish. It grows well
in both wet and dry places.
and Nutritional Value
leaves, petioles and stems are used as vegetable, cooked alone
or with meat or fish. The vines are also used as fodder for cattle
g edible portion contains:
Pro Vitamin A
Vitamin C 30.0
- 130.0 mg
Energy Value 134.0
Kangkong Tsina-Narrow leaves
Chinese Upland-narrow leaves
And Soil Requirements
kangkong can be grown from low to mid elevations throughout the
year. Production is best in sandy to clay loam soil with a pH
land by plowing and harrowing twice. Prepare raised beds 1 m
wide. Spread well-decomposed animal manure at the rate of 1-2
kg/m2 between beds. Make shallow lines 10 cm apart across the
beds before sowing.
can be grown in garden plots and containers. Sow seeds directly
in rows or space evenly in containers.
and cuttings are used for propagation. Plant densities may vary
between 30-170 plants/m2.
1-2 kg/m2 animal manure before sowing. Ten to fifteen days later,
topdress with urea (46-0-0) or ammonium sulfate (21-0-0).
the plants everyday or as needed. Mulch with rice straw or rice
hull to cut watering by at least 50%.
and Disease Management
whiteflies and aphids cause serious damage. Control by regular
pruning of stems. Spray the plants with hot pepper extract or
insecticidal soap to get rid of aphids.
pruning at three weeks interval can minimize white rust.
by cutting young shoots 20-50 days after sowing and subsequently
at regular intervals. The plants are cut about 5-10 cm above
ground. Uprooting can also be practiced at 20-30 days after sowing.
kangkong flowers in October and seeds start to mature from March
to April. For small-scale production, harvest dried or mature
fruits individually. Sun-dry until the husk is brittle enough
for seed extraction. Each fruit contains 3-4 seeds.
large-scale seed production, harvest the entire plant when majority
of the fruits are mature. Sun-dry for 3-5 days and thresh in
the rice thresher. The hay or refuse may be fed to the thresher
several times to maximize seeds yield. Dry extracted seeds to
about 10-11% moisture content. Winnow to remove debris and poor
quality seeds. Pack in moisture-proof containers. Label and store
in a cool, dry place. There is no need to treat kangkong seeds
and Return Analysis Per Hectare
I. VARIABLE COSTS P
A. Labor (P150/MD)
Manure application 2,000
Mulching w/ rice straw
(10 MD;4 x/yr.) 6,000
For 10 mos.) 21,000
Irrigation (40 MD) 6,000
Weeding (35 MD)
Harvesting (10 MD); 10,500
Miscellaneous (50 MD) 7,500
Seeds (80 kg/ha) 30,400 Animal manure (20 t)
Fuel & Oil 10,000
II. FIXED COSTS 22,463
Land rental 10,000
5 pcs. Scythe (2 yrs) 63
5 pcs. Hoe ( 3 yrs) 125
3 pcs. Shovel (3 yrs)
5 pcs. Plastic crates (5 yrs) 200
Interest on Loans at 20% int. p.a. 12,000
GROSS INCOME a 250
a With marketable yield of 50-70 t/ha at P5 /kg
Kangkong Production Guide
Info Bulletin No. 163/2000