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Use of Sweet Potato (Ipomoea batatas) Leaf Tips as Vegetables II. Evaluation of Yield and Nutritive Quality†

Published online by Cambridge University Press:  03 October 2008

R. L. Villareal ,
S. C. S. Tsou ,
S. K. Lin  and
S. C. Chiu
R. L. Villareal
Affiliation:
Asian Vegetable Research and Development Center (AVRDC), PO Box 42, Shanhua, Tainan 741, Taiwan, Republic of China
S. C. S. Tsou
Affiliation:
Asian Vegetable Research and Development Center (AVRDC), PO Box 42, Shanhua, Tainan 741, Taiwan, Republic of China
S. K. Lin
Affiliation:
Asian Vegetable Research and Development Center (AVRDC), PO Box 42, Shanhua, Tainan 741, Taiwan, Republic of China
S. C. Chiu
Affiliation:
Asian Vegetable Research and Development Center (AVRDC), PO Box 42, Shanhua, Tainan 741, Taiwan, Republic of China
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Summary

Yields of sweet potato tips varied from 10 to 16 t/ha in weight and 61 to 352/m2 in number, whilst yields of marketable roots varied from 1 to 16 t/ha. Cultivar differences in dry matter, fibre, ash, vitamin B2 and oxalate were also observed. The tips appeared to provide an excellent source of vitamin B2 which is important for Asian diets deficient in this vitamin. Application of 120 kg N/ha gave higher tip yields than no nitrogen, primarily due to increases in their number and size. Among the leaf types evaluated, Kinangkong (a fine leaf cultivar) produced the highest yield, and had the highest amount of protein, lowest oxalate, and fairly high dry matter, which makes it a very desirable leafy vegetable.

Type
Research Article
Information
Experimental Agriculture , Volume 15 , Issue 2 , April 1979 , pp. 117 - 122
Copyright
Copyright © Cambridge University Press 1979

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References

REFERENCES

AOAC (1971). Official Methods of Analysis (11th edn). Washington, DC.Google Scholar
AVRDC (1976). Sweet Potato Report for 1975. Tainan, Taiwan.Google Scholar
FNRC (1968). Food Composition Table (Handbook 1, 3rd edn). Manila, Philippines: Nat. Sci. Dev. Board.Google Scholar
Villareal, R. L., Lin, S. K., Chang, L. S. & Lai, S. H. (1979). Expl Agric. 15, 113.CrossRefGoogle Scholar