Ratag, Samuel P. and Tasirin, J. S. and Pangemanan, E. F.
(2013)
Potensi Agroforestri Tanaman Talas Rawa Raksasa (Cyrtosperma merkusii
(Hassk.) Schott) pada Lahan Rawa Pasang Surut untuk Ketahanan Pangan.
In: Seminar Nasional Agrofrestri IV, 26 Oktober 2013, Universitas Lambung Mangkurat, Banjarbaru, Kalimantan Selatan.
Abstract
Giant swamp taros are the only edible species in the Cyrtosperma genera of the aroid family
(Araceae). They grows in tidal swamps. There is a lack of information on environmental growing
requirement for the plants and to what extent the species are suitable for agroforestry in tidal
freshwater wetlands. The objectives of this research are to know leaf chlorophyll content of giant
swamp taro crop under the shade and in the opening, as well as the nutrition contents of the taro
corm powder in inundated-not inundated conditions by backrish water at freshwater tidal swamp
forested.
Study was done in the swamp lands of Pokol dan Nagha-1 villages, in Sangihe Islands. The
results shows that the plant grows in areas that are naturally inundated by salt and fresh water.
Water salinity is around 0.59-0.85 ppt, water pH is 6.9-7.9, and soil pH is 4.2-6.5. Leaf total
clorophyl content shows a significant adaptation to shade. It is 3.17-3.31 and 5.44-5.74 mg/l
under the shade and in the opening, repectively. Growth response and taro production are both
higher under the shade then they are in the opening. The corm powder contains carbohidrate
84.16 – 87.36 %, protein 0.71 – 2.18 %, and fat 0.05 – 0.17 %. Giant swamp taro is potential
solution to the regional and national food security by developing the plant into a wetland
agroforestry system which covers the less productive swamp areas that are influenced by fresh
and salt water.
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