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Response of non-flooded rice to nitrogen rate


Citation

Othman, Sariam and Yusop, Mohd Khanif and Talib, Zahrah (2005) Response of non-flooded rice to nitrogen rate. Journal of Tropical Agriculture and Food Science, 33 (1). pp. 17-23. ISSN 1394-9829; ESSN: 2289-9650

Abstract / Synopsis

Nitrogen and water supply are important factors that influence rice growth and yield. The grain yield response to N application rate was significantly quadratic in nature irrespective of water management practices. A higher yield response to N application rate was observed under flooded as compared to non-flooded (NF)- saturated and non-flooded (NF)-field capacity conditions. The estimated N rates for maximum yield were 99, 105 and 126 kg/ha for flooded, NF-saturated and NF-field capacity conditions, respectively. The higher amount of N needed for maximum rice yield under NF-field capacity conditions was probably due to greater N losses as a result of alternate wetting and drying of soil as well as the reduced root system. However, the optimum N rate for maximum yield did not differ very much between flooded and NF-saturated conditions indicating the close similarity in N requirement under both water management practices. The dry shoot biomass response to N rate was quadratic but it was not significant under flooded and NF-saturated conditions. However, a significant quadratic response was observed for dry root biomass under flooded and NF-saturated conditions. The dry shoot and root biomass response to N rate was significantly linear under NF-field capacity conditions.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
Publisher: Malaysian Agricultural Research and Development Institute (MARDI)
Keywords: Non-flooded rice; Nitrogen rate; Water management; Growth; Yield
Depositing User: Nabilah Mustapa
Date Deposited: 29 Dec 2016 17:58
Last Modified: 29 Dec 2016 17:58
URI: http://psasir.upm.edu.my/id/eprint/48937
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