Measurement of nitrogen fixed by Pueraria phaseoloides by N-15 dilution technique

Zaharah Abdul Rahman, . and Sharifuddin Haji Abdul Hamid, . and Razley M.N., . and Mohd Saidi, . Measurement of nitrogen fixed by Pueraria phaseoloides by N-15 dilution technique. pp. 45-49. ISSN 0126-6128

A field experiment was carried out to determine the amount of nitrogen fixed by Pueraria phaseloides which was grown as a cover in the interrow of two-year olf oil palms (Elaeis guineensis) in Seafield Estate Batu Tiga Selangor. The grasses that were found growing together with the legume cover were Paspalum conjugatum and Ottochloa nodosa. Plots of 1 m by 1 m were randomly selected within the interrows of the palms to give various mixtures of grass and legume. These plots were cut at 5 cm above the ground and applied with 2 g N/m2 as ammonium sulphate enriched with 10 atom axcess N-15. The regrowth of the legume and grass were harvested after three months and analysed for total N and N-15 enrichment of the tissues. The results showed that there were significant differences in total N fixed by Pueraria mixed with different percentages of grass. At 0-40 legume composition the total N fixed by Pueraria was 9.20 kg/ha/3 months and increased to 22.34 and 37.80 kg/ha/3 months at 41-60 and 61-80 respectively. Total N fixed at 81-100 legume composition was 22.73 kg/ha/3 months. The maximum amount of N fixed by Pueraria was when the mixture contained about 80 legume standing

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Abstract

A field experiment was carried out to determine the amount of nitrogen fixed by Pueraria phaseloides which was grown as a cover in the interrow of two-year olf oil palms (Elaeis guineensis) in Seafield Estate Batu Tiga Selangor. The grasses that were found growing together with the legume cover were Paspalum conjugatum and Ottochloa nodosa. Plots of 1 m by 1 m were randomly selected within the interrows of the palms to give various mixtures of grass and legume. These plots were cut at 5 cm above the ground and applied with 2 g N/m2 as ammonium sulphate enriched with 10 atom axcess N-15. The regrowth of the legume and grass were harvested after three months and analysed for total N and N-15 enrichment of the tissues. The results showed that there were significant differences in total N fixed by Pueraria mixed with different percentages of grass. At 0-40 legume composition the total N fixed by Pueraria was 9.20 kg/ha/3 months and increased to 22.34 and 37.80 kg/ha/3 months at 41-60 and 61-80 respectively. Total N fixed at 81-100 legume composition was 22.73 kg/ha/3 months. The maximum amount of N fixed by Pueraria was when the mixture contained about 80 legume standing

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Item Type:	Article
Additional Information:	4 tables; 12 ref. Summaries (En Malay)
AGROVOC Term:	PUERARIA PHASEOLOIDES
AGROVOC Term:	FIJACION DEL NITROGENO
AGROVOC Term:	ELAEIS GUINEENSIS
AGROVOC Term:	PASPALUM CONJUGATUM
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:54
URI:	http://webagris.upm.edu.my/id/eprint/18847

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