Journal article

Publication year: 2021

Pages: 1493-1509

Journal: Communications in Soil Science and Plant Analysis

Volume number: 52

Issue number: 13

ISSN: 0010-3624

eISSN: 1532-2416

DOI Link: https://doi.org/10.1080/00103624.2021.1885692

Publisher: Taylor and Francis Group

Abstract: 
Crop responses to nitrogen (N) fertilization reportedly depend on the storage of soluble N in the soil profile from the previous N-fertilization. We examined the profile storage of dissolved inorganic, DIN (NH4-N + NO3-N), and dissolved organic N, DON, in a savanna soil fertilized for over 50 years with farmyard manure, FYM, NPK-fertilizer, and their combination, FYM+NPK, along with a control plot and a native site, to determine the fertilization practice that best conserved soluble N from previous N-fertilization for subsequent cropping. The weight of total dissolved N (TDN) of 196 kg ha(-1) in the soil profile under native vegetation was 3-4 times greater than 53 kg ha(-1) in FYM+NPK-plot and the 64 and 65 kg ha(-1) in the FYM-only and NPK-only, respectively. The NO3-N weight of 93 kg ha(-1) under native vegetation was 5-9 times greater than the 11 kg ha(-1) (NPK-only) to 19 kg ha(-1) in the control. The DON weight of 45 kg ha(-1) (native site) was 2-15 times greater than the 3 kg ha(-1) in FYM+ NPK-plot and 29 kg ha(-1) in NPK-only. Compartmentalizing the profile into the root zone (0-60 cm) and beyond the root zone (60-120 cm) indicated 76% NO3-N and 38% DON storage beyond the root zone under native vegetation due to leaching. Mean percentage changes in TDN in soil profiles under cultivation, using the native site as the reference, were - 83% for NO3-N, - 73% for DON, and - 29% for NH4-N, but the changes varied with fertilization practices.

Harvard Citation style: Agbenin, J. and Felix-Henningsen, P. (2021) Profile Storage and Deep Leaching of Soluble Nitrogen in a Savanna Soil under Continuous Cultivation and Fertilization for over Fifty Years in Nigeria, Communications in Soil Science and Plant Analysis, 52(13), pp. 1493-1509. https://doi.org/10.1080/00103624.2021.1885692

APA Citation style: Agbenin, J., & Felix-Henningsen, P. (2021). Profile Storage and Deep Leaching of Soluble Nitrogen in a Savanna Soil under Continuous Cultivation and Fertilization for over Fifty Years in Nigeria. Communications in Soil Science and Plant Analysis. 52(13), 1493-1509. https://doi.org/10.1080/00103624.2021.1885692