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Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions

Roots can be an important though poorly quantified source of nitrogen (N) in agroforestry systems. Nitrogen uptake of maize using P. falcataria below- and aboveground biomass separately, and their combination, as source of N, was assessed in a controlled experiment using 15N isotope labeling techniq...

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Main Authors: Chintu, R., Zaharah, A.R.
Format: Article
Published: Springer Science and Business Media LLC 2003
Online Access:http://psasir.upm.edu.my/id/eprint/115229/
https://link.springer.com/article/10.1023/A:1023940602481?error=cookies_not_supported&code=bbefb939-c637-44ca-a082-06c70efcf4f4
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spelling my.upm.eprints.1152292025-02-26T08:15:29Z http://psasir.upm.edu.my/id/eprint/115229/ Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions Chintu, R. Zaharah, A.R. Roots can be an important though poorly quantified source of nitrogen (N) in agroforestry systems. Nitrogen uptake of maize using P. falcataria below- and aboveground biomass separately, and their combination, as source of N, was assessed in a controlled experiment using 15N isotope labeling techniques. The 15N-direct and the 15N-indirect labeling techniques were compared for discrepancies in measuring N cycling from P. falcataria tree residues. N contribution to maize production was as follows; 40-57% from below ground biomass and 10-18% from above ground biomass (P < 0.05). Residue N use efficiency (%rNE) by maize was between 99 and 106% for belowground biomass, 4-4.5% for aboveground biomass. This implies that though nutrient release characteristics of aboveground biomass are commonly used as a basis for selection of agroforestry trees, those of belowground biomass would be of fundamental importance as well. Combining P falcataria below and aboveground biomass did not result in significant (P < 0.05) effects on N recovered by maize, suggesting the absence of decomposition interactions between the two bio-chemically contrasting residues. There were no significant methodological differences reflected in measured N cycled by maize from leaves (Ndfr); 15% and 18% as estimated by 15N direct and indirect method, respectively. The two methods compared very well (P < 0.05) as tools of estimating N cycling from surface applied leaves. However, the ability of the direct method to measure N without disturbing either the tree or the soil, would make it a more attractive and valuable tool in N cycling studies in agroforestry systems. Springer Science and Business Media LLC 2003 Article PeerReviewed Chintu, R. and Zaharah, A.R. (2003) Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions. Agroforestry Systems, 57 (2). pp. 101-107. ISSN 0167-4366 https://link.springer.com/article/10.1023/A:1023940602481?error=cookies_not_supported&code=bbefb939-c637-44ca-a082-06c70efcf4f4 10.1023/A:1023940602481
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description Roots can be an important though poorly quantified source of nitrogen (N) in agroforestry systems. Nitrogen uptake of maize using P. falcataria below- and aboveground biomass separately, and their combination, as source of N, was assessed in a controlled experiment using 15N isotope labeling techniques. The 15N-direct and the 15N-indirect labeling techniques were compared for discrepancies in measuring N cycling from P. falcataria tree residues. N contribution to maize production was as follows; 40-57% from below ground biomass and 10-18% from above ground biomass (P < 0.05). Residue N use efficiency (%rNE) by maize was between 99 and 106% for belowground biomass, 4-4.5% for aboveground biomass. This implies that though nutrient release characteristics of aboveground biomass are commonly used as a basis for selection of agroforestry trees, those of belowground biomass would be of fundamental importance as well. Combining P falcataria below and aboveground biomass did not result in significant (P < 0.05) effects on N recovered by maize, suggesting the absence of decomposition interactions between the two bio-chemically contrasting residues. There were no significant methodological differences reflected in measured N cycled by maize from leaves (Ndfr); 15% and 18% as estimated by 15N direct and indirect method, respectively. The two methods compared very well (P < 0.05) as tools of estimating N cycling from surface applied leaves. However, the ability of the direct method to measure N without disturbing either the tree or the soil, would make it a more attractive and valuable tool in N cycling studies in agroforestry systems.
format Article
author Chintu, R.
Zaharah, A.R.
spellingShingle Chintu, R.
Zaharah, A.R.
Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions
author_facet Chintu, R.
Zaharah, A.R.
author_sort Chintu, R.
title Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions
title_short Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions
title_full Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions
title_fullStr Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions
title_full_unstemmed Nitrogen uptake of maize (Zea mays. L) from isotope-labeled biomass of Paraserianthes falcataria grown under controlled conditions
title_sort nitrogen uptake of maize (zea mays. l) from isotope-labeled biomass of paraserianthes falcataria grown under controlled conditions
publisher Springer Science and Business Media LLC
publishDate 2003
url http://psasir.upm.edu.my/id/eprint/115229/
https://link.springer.com/article/10.1023/A:1023940602481?error=cookies_not_supported&code=bbefb939-c637-44ca-a082-06c70efcf4f4
_version_ 1825162453717090304
score 13.244413

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