Upland rice root characteristics and their relationship to nitrogen uptake


Citation

Mohamed Hanafi Musa, . and Zaharah Abdul Rahman, . Upland rice root characteristics and their relationship to nitrogen uptake. pp. 261-266. ISSN 1511-3701

Abstract

Nitrogen and phosphorus efficiencies are the main constraints to food production in the sub-humid and humid tropic soils. A laboratory and glasshouse study was initiated to examine the differences in the root architecture of Malaysian upland rice landraces and relate them to efficiency of the nitrogen fertilizer uptake. Six upland rice landraces obtained locally were soaked in water and allowed to germinate using the cigar role method. The seedlings were fertilized with a complete nutrient solution daily and the roots which were allowed to develop after 14 days were measured using the WINRHIZO. The same landraces were planted in the glasshouse in polybags containing 25 kg soil in four replications. N-15 labelled urea was applied at 170 kg N/ha and N use efficiency was measured at harvest. Significant differences in root length surface area root volume average root diameter and number of forks between the 6 landraces were studied. Nitrogen in the plant (derived from fertilizer applied) was found to range from 6.22 “ 27.6. Nevertheless a poor correlation was obtained between the length of root and the dry matter yield and the total N uptake. Five of the landraces tested showed a good potential in taking up the fertilizer N applied.


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Abstract

Nitrogen and phosphorus efficiencies are the main constraints to food production in the sub-humid and humid tropic soils. A laboratory and glasshouse study was initiated to examine the differences in the root architecture of Malaysian upland rice landraces and relate them to efficiency of the nitrogen fertilizer uptake. Six upland rice landraces obtained locally were soaked in water and allowed to germinate using the cigar role method. The seedlings were fertilized with a complete nutrient solution daily and the roots which were allowed to develop after 14 days were measured using the WINRHIZO. The same landraces were planted in the glasshouse in polybags containing 25 kg soil in four replications. N-15 labelled urea was applied at 170 kg N/ha and N use efficiency was measured at harvest. Significant differences in root length surface area root volume average root diameter and number of forks between the 6 landraces were studied. Nitrogen in the plant (derived from fertilizer applied) was found to range from 6.22 “ 27.6. Nevertheless a poor correlation was obtained between the length of root and the dry matter yield and the total N uptake. Five of the landraces tested showed a good potential in taking up the fertilizer N applied.

Additional Metadata

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Item Type: Article
AGROVOC Term: Upland rice
AGROVOC Term: Nitrogen fertilizers
AGROVOC Term: Seeds
AGROVOC Term: Root length
AGROVOC Term: Experiments
AGROVOC Term: Nitrates
AGROVOC Term: Nutrient uptake
AGROVOC Term: Root systems
AGROVOC Term: Dry matter content
AGROVOC Term: Agronomic characters
Geographical Term: Malaysia
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 28 Apr 2025 00:10
URI: http://webagris.upm.edu.my/id/eprint/22790

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