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Long-term Productivity of Intensive Rice Cropping Systems on the Central Plain of Thailand

Published online by Cambridge University Press:  03 October 2008

J. J. Walcott
Affiliation:
Thai-Australia Chao Phya Research Project, Central Regional Agricultural Centre, PO Box 1, Chainat, Thailand
M. Chauviroj
Affiliation:
Thai-Australia Chao Phya Research Project, Central Regional Agricultural Centre, PO Box 1, Chainat, Thailand
A. Chinchest
Affiliation:
Thai-Australia Chao Phya Research Project, Central Regional Agricultural Centre, PO Box 1, Chainat, Thailand
P. Choticheuy
Affiliation:
Thai-Australia Chao Phya Research Project, Central Regional Agricultural Centre, PO Box 1, Chainat, Thailand
R. Ferraris
Affiliation:
Thai-Australia Chao Phya Research Project, Central Regional Agricultural Centre, PO Box 1, Chainat, Thailand
B. W. Norman
Affiliation:
Thai-Australia Chao Phya Research Project, Central Regional Agricultural Centre, PO Box 1, Chainat, Thailand

Summary

The productivity of seven multiple rice-cropping systems, utilizing a short-duration cultivar under irrigation, were assessed over 5 years. Systems of one, two and three crops a year were compared. Multiple cropping reduced grain yield, panicles m-2, total dry matter and nitrogen uptake per crop. However, the unfertilized three-crop-per-year system averaged 9·1 t grain, 17·1 t DM and 126 kg N ha-1 per annum, without showing a long term decline in productivity. Recovery and utilization of nitrogen fertilizer were generally low compared to other experiments, and were highest for the early dry season cropping period.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1977

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References

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