Effect of different nitrogen fertilizer application rates on Dichrostachys cinerea and Acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern African savanna

Nitrogen (N) fertilization influences woody plant growth, foliar nutrient and antinutrient concentrations. We conducted a nursery experiment to determine the effect of five N fertilization rates on Dichrostachys cinerea and Acacia karroo sapling height, basal diameter, growth of longest shoots an...

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Main Authors: Nyamukanza, Casper C., Sebata, Allan
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Language:English
Published: John Wiley and Sons Inc. 2021
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Online Access:https://www.researchgate.net/publication/337535116_Effect_of_different_nitrogen_fertilizer_application_rates_on_Dichrostachys_cinerea_and_Acacia_karroo_sapling_growth_foliar_nutrient_and_antinutrient_concentrations_in_a_southern_African_savanna/link/5ddd3b064585159aa44a41d5/download
http://hdl.handle.net/11408/4304
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author Nyamukanza, Casper C.
Sebata, Allan
author2 #PLACEHOLDER_PARENT_METADATA_VALUE#
author_facet #PLACEHOLDER_PARENT_METADATA_VALUE#
Nyamukanza, Casper C.
Sebata, Allan
author_sort Nyamukanza, Casper C.
collection DSpace
description Nitrogen (N) fertilization influences woody plant growth, foliar nutrient and antinutrient concentrations. We conducted a nursery experiment to determine the effect of five N fertilization rates on Dichrostachys cinerea and Acacia karroo sapling height, basal diameter, growth of longest shoots and root length, crude protein (CP), acid and neutral detergent fiber (NDF), condensed tannins (CT) and total phenolic (TP) concentrations. Eight potted plants of each woody species were allocated to each of five N fertilization rates (0, 0.21, 0.42, 0.63 and 0.84 g N/kg of soil) in a completely randomized design. Different N fertilization rates did not result in varying plant growth in terms of height, stem diameter and root length in both D. cinerea and A. karroo. However, N fertilization rate of 0.63 g N per kg of soil resulted in an increase in length of the longest shoot in both D. cinerea and A. karroo. Foliar CP increased with an increase in N fertilization rate up to 0.63 g N per kg of soil, while acid and NDF, CT and TP were lowest at N fertilization rates of 0.63 g N per kg of soil in both D. cinerea and A. karroo. We conclude that N did not limit plant growth, and therefore N fertilization is unlikely to significantly improve sapling growth. However, N fertilization improved foliar CP and reduced CT and TP concentrations in both D. cinerea and A. karroo improving their nutritive value to browsers.
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spelling ir-11408-43042022-10-15T21:05:54Z Effect of different nitrogen fertilizer application rates on Dichrostachys cinerea and Acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern African savanna Nyamukanza, Casper C. Sebata, Allan #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# carbon-based plant secondary metabolites crude protein fiber nitrogen-fixing plant height Nitrogen (N) fertilization influences woody plant growth, foliar nutrient and antinutrient concentrations. We conducted a nursery experiment to determine the effect of five N fertilization rates on Dichrostachys cinerea and Acacia karroo sapling height, basal diameter, growth of longest shoots and root length, crude protein (CP), acid and neutral detergent fiber (NDF), condensed tannins (CT) and total phenolic (TP) concentrations. Eight potted plants of each woody species were allocated to each of five N fertilization rates (0, 0.21, 0.42, 0.63 and 0.84 g N/kg of soil) in a completely randomized design. Different N fertilization rates did not result in varying plant growth in terms of height, stem diameter and root length in both D. cinerea and A. karroo. However, N fertilization rate of 0.63 g N per kg of soil resulted in an increase in length of the longest shoot in both D. cinerea and A. karroo. Foliar CP increased with an increase in N fertilization rate up to 0.63 g N per kg of soil, while acid and NDF, CT and TP were lowest at N fertilization rates of 0.63 g N per kg of soil in both D. cinerea and A. karroo. We conclude that N did not limit plant growth, and therefore N fertilization is unlikely to significantly improve sapling growth. However, N fertilization improved foliar CP and reduced CT and TP concentrations in both D. cinerea and A. karroo improving their nutritive value to browsers. 2021-05-31T14:14:39Z 2021-05-31T14:14:39Z 2019 text 1440-1703 https://www.researchgate.net/publication/337535116_Effect_of_different_nitrogen_fertilizer_application_rates_on_Dichrostachys_cinerea_and_Acacia_karroo_sapling_growth_foliar_nutrient_and_antinutrient_concentrations_in_a_southern_African_savanna/link/5ddd3b064585159aa44a41d5/download http://hdl.handle.net/11408/4304 en Ecological Research;1 - 8 open John Wiley and Sons Inc.
spellingShingle carbon-based plant secondary metabolites
crude protein
fiber
nitrogen-fixing
plant height
Nyamukanza, Casper C.
Sebata, Allan
Effect of different nitrogen fertilizer application rates on Dichrostachys cinerea and Acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern African savanna
title Effect of different nitrogen fertilizer application rates on Dichrostachys cinerea and Acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern African savanna
title_full Effect of different nitrogen fertilizer application rates on Dichrostachys cinerea and Acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern African savanna
title_fullStr Effect of different nitrogen fertilizer application rates on Dichrostachys cinerea and Acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern African savanna
title_full_unstemmed Effect of different nitrogen fertilizer application rates on Dichrostachys cinerea and Acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern African savanna
title_short Effect of different nitrogen fertilizer application rates on Dichrostachys cinerea and Acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern African savanna
title_sort effect of different nitrogen fertilizer application rates on dichrostachys cinerea and acacia karroo sapling growth, foliar nutrient and antinutrient concentrations in a southern african savanna
topic carbon-based plant secondary metabolites
crude protein
fiber
nitrogen-fixing
plant height
url https://www.researchgate.net/publication/337535116_Effect_of_different_nitrogen_fertilizer_application_rates_on_Dichrostachys_cinerea_and_Acacia_karroo_sapling_growth_foliar_nutrient_and_antinutrient_concentrations_in_a_southern_African_savanna/link/5ddd3b064585159aa44a41d5/download
http://hdl.handle.net/11408/4304
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