Research Article

Short - Term Effect of Soil Tillage and Npk Fertilization Rates on Soil Carbon Sequestration and Yield of Colocasia Esculenta Schott in Two Micro - Environments in Se, Nigeria

Anikwe M. A. N1*, Ikengannyia E. E2
1 Department of Agronomy and Ecological Management, Enugu State University of Science and Technology, Enugu, Nigeria
2 Department of Agronomy and Ecological Management, Enugu State University of Science and Technology, PMB 01660 Enugu, Nigeria.
* Corresponding author: anikwema@yahoo.co.uk
Published: Apr, 2019
DOI: 10.67042/njss.2019.kwortf91
Pages: 96-101
Views: 451
Downloads: 729

Abstract

Quantification of soil organic carbon cycling as impacted by soil and crop man- agement practices is required for C storage and soil quality improvement investi- gations. This study assessed the short-term effect of conventional tillage (CT) and No-Tillage (NT) practices on SOC sequestration and yield of cocoyam (Colocasia esculenta). The experiment was conducted simultaneously at two lo- cations (06◦52' N, 07◦15' E and 06◦ 26' N, 07◦16' E) in southeast Nigeria. A Ran- domized Complete Block Design with five replications and four treatments com- prised of CT and NT, respectively, with 150 and 300 Kg ha-1 of NPK 15:15:15, was used. Soil quality attributes were measured at two soil depths (0-20 cm and 20-40 cm) in both locations and analyzed. The results indicated that the quantity of carbon sequestered in the soil at 0-20 cm soil depth for both sites was 46.7- 90.9 and 65.0-117.9 Mg ha-1, respectively, for the two planting seasons in NT plots treated with 300 Kg ha-1 of NPK. This was followed by NT plots treated with 150 Kg ha-1 of NPK, which sequestered 55.5-86.2 and 46.7-91.9 Mg ha-1 SOC. CT plots that received 300 Kg ha-1 NPK with 11.3-47.6 Mg/ha SOC had 44% and 28% lower stored SOC when compared to NT, NPK 150 Kg ha-1 plots for the two-planting season respectively. This indicates that CT practices signifi- cantly limit SOC sequestration. CT with 300 Kg of NPK 15:15:15 gave the high- est corm yield, followed by No-till with 300 Kg ha-1. A better edaphic condition provided by CT was compensated for by higher doses of N fertilizer in NT Plots.

Keywords

prised of ct and nt respectively with 150 and 300 kg ha-1 of npk 15:15:15

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How to Cite

N, A. M. A., & E, I. E. (2019). Short - Term Effect of Soil Tillage and Npk Fertilization Rates on Soil Carbon Sequestration and Yield of Colocasia Esculenta Schott in Two Micro - Environments in Se, Nigeria. Nigerian Journal of Soil Science, 29(2), 96-101. https://doi.org/10.67042/njss.2019.kwortf91

A. M. A. N, and I. E. E, "Short - Term Effect of Soil Tillage and Npk Fertilization Rates on Soil Carbon Sequestration and Yield of Colocasia Esculenta Schott in Two Micro - Environments in Se, Nigeria," Nigerian Journal of Soil Science, vol. 29, no. 2, pp. 96-101, April 2019. doi: 10.67042/njss.2019.kwortf91

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