Nitrogen contribution by a legume tree Paraserienthes falcataria biomass to a corn crop

Kadir W.R., . and Chintu R., . and Zaharah A.R., . and Anuar A.R., . and Halimi M.S., . (2002) Nitrogen contribution by a legume tree Paraserienthes falcataria biomass to a corn crop. [Proceedings Paper]

In agroforestry land-use system organic inputs in terms of above-ground fresh leaves and dry litter and below-ground dead and live root biomass from nitrogen rich tree legumes play a significant role in supplying N to the associated crops. Literature on most agroforestry cropping systems has dealt much on N contribution of tree above-ground biomass to crops Buresh et al. 1997 zaharah et al. 1999 Kwesiga et al. 1999 Poor documentation on the role of roots below-ground biomass is available due the difficulty in undertaking quantitative root studies in the field Schroth 1999. This study was carried out to quantify the N contribution to grain corn crop by P. falcataria fresh leaves and roots using superscript 15 N-isotope to label the whole tree and the corn plants while the roots remained in the soil. Results from this study showed that P. falcataria below-ground biomass has a higher N contribution 57 to corn than the above-ground biomass 14 . The lower recovery from above ground biomass that was surface applied was attributed to the quick N release pattern from the high quality leaves that has little synchrony with the nutrient demand by corn plants. Hence resulting in large N losses and low utilization by crops. The underground biomass had a more conductive decomposition environment for N mineralization and thus a higher N use efficiency. This in situ labeling of tree biomass has proved to be a valuable tool in studying N cycling of above- and below-ground tree biomass and their respective N contribution to the associated crop.

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Abstract

In agroforestry land-use system organic inputs in terms of above-ground fresh leaves and dry litter and below-ground dead and live root biomass from nitrogen rich tree legumes play a significant role in supplying N to the associated crops. Literature on most agroforestry cropping systems has dealt much on N contribution of tree above-ground biomass to crops Buresh et al. 1997 zaharah et al. 1999 Kwesiga et al. 1999 Poor documentation on the role of roots below-ground biomass is available due the difficulty in undertaking quantitative root studies in the field Schroth 1999. This study was carried out to quantify the N contribution to grain corn crop by P. falcataria fresh leaves and roots using superscript 15 N-isotope to label the whole tree and the corn plants while the roots remained in the soil. Results from this study showed that P. falcataria below-ground biomass has a higher N contribution 57 to corn than the above-ground biomass 14 . The lower recovery from above ground biomass that was surface applied was attributed to the quick N release pattern from the high quality leaves that has little synchrony with the nutrient demand by corn plants. Hence resulting in large N losses and low utilization by crops. The underground biomass had a more conductive decomposition environment for N mineralization and thus a higher N use efficiency. This in situ labeling of tree biomass has proved to be a valuable tool in studying N cycling of above- and below-ground tree biomass and their respective N contribution to the associated crop.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. mal S590.2 M239 2002 Call Number
AGROVOC Term:	NITROGEN
AGROVOC Term:	LEGUMES
AGROVOC Term:	BIOMASS
AGROVOC Term:	MAIZE
AGROVOC Term:	CROP YIELD
AGROVOC Term:	GRAIN CROPS
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:26
URI:	http://webagris.upm.edu.my/id/eprint/15538

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