The optimal recommended rates of phosphorus (P) and potassium (K) in the Kilombero valley, Tanzania are outdated. The Objective of the study was to establish optimum rates of P and K for improved rice cultivation in rice fields of Kilombero valley. Two on-farm experiments were carried out in two seasons of January to May 2014 and 2015 at Mkula, Mbasa and Kisawasawa sites in Kilombero district, Tanzania. In the first experiment the treatments were a control for P; adequate levels of N and K plus two rates of phosphorus 10 and 20 kg P /ha. In the second experiment the treatments were a control for K; and two rates of K of either 50 or 100 kg/ha. These three treatments each received adequate levels of N, P and Zn. An absolute control and a control for N treatments were included in both of the experiments. The test crop was rice variety SARO-5. Phosphorus application significantly increased grain yield (GY) by 3.26 and 2.01 t/ha at Mbasa and Mkula, respectively. Also P application increased shoot P concentration from a low level (0.12%) to the adequate range (0.19 - 0.24%) at the two sites. Potassium application increased significantly GY by 2.76 and 1.93 t/ha at Mbasa and Mkula, respectively. Also K application increased shoot K concentration from a low range (1.14 - 1.34%) to the adequate range (2.63 - 2.99%) at the two sites. An application of P and K affected neither shoot K nor P concentrations nor GY at Kisawasawa site. It is recommended that 10 kg P/ha and 50 kg K/ha be used as optimum rate for rice production in P and K deficient soils of Kilombero valley.
| Published in | Agriculture, Forestry and Fisheries (Volume 6, Issue 1) |
| DOI | 10.11648/j.aff.20170601.14 |
| Page(s) | 26-33 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
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Copyright © The Author(s), 2024. Published by Science Publishing Group |
Optimum P Rate, Optimum K Rate, Lowland- Rainfed, Macronutrients
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APA Style
Asheri Mwamba Kalala, Nyambilila Abdallah Amuri, Johnson Mashambo Semoka. (2017). Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania. Agriculture, Forestry and Fisheries, 6(1), 26-33. https://doi.org/10.11648/j.aff.20170601.14
ACS Style
Asheri Mwamba Kalala; Nyambilila Abdallah Amuri; Johnson Mashambo Semoka. Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania. Agric. For. Fish. 2017, 6(1), 26-33. doi: 10.11648/j.aff.20170601.14
AMA Style
Asheri Mwamba Kalala, Nyambilila Abdallah Amuri, Johnson Mashambo Semoka. Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania. Agric For Fish. 2017;6(1):26-33. doi: 10.11648/j.aff.20170601.14
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Download@article{10.11648/j.aff.20170601.14,
author = {Asheri Mwamba Kalala and Nyambilila Abdallah Amuri and Johnson Mashambo Semoka},
title = {Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania},
journal = {Agriculture, Forestry and Fisheries},
volume = {6},
number = {1},
pages = {26-33},
doi = {10.11648/j.aff.20170601.14},
url = {https://doi.org/10.11648/j.aff.20170601.14},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.aff.20170601.14},
abstract = {The optimal recommended rates of phosphorus (P) and potassium (K) in the Kilombero valley, Tanzania are outdated. The Objective of the study was to establish optimum rates of P and K for improved rice cultivation in rice fields of Kilombero valley. Two on-farm experiments were carried out in two seasons of January to May 2014 and 2015 at Mkula, Mbasa and Kisawasawa sites in Kilombero district, Tanzania. In the first experiment the treatments were a control for P; adequate levels of N and K plus two rates of phosphorus 10 and 20 kg P /ha. In the second experiment the treatments were a control for K; and two rates of K of either 50 or 100 kg/ha. These three treatments each received adequate levels of N, P and Zn. An absolute control and a control for N treatments were included in both of the experiments. The test crop was rice variety SARO-5. Phosphorus application significantly increased grain yield (GY) by 3.26 and 2.01 t/ha at Mbasa and Mkula, respectively. Also P application increased shoot P concentration from a low level (0.12%) to the adequate range (0.19 - 0.24%) at the two sites. Potassium application increased significantly GY by 2.76 and 1.93 t/ha at Mbasa and Mkula, respectively. Also K application increased shoot K concentration from a low range (1.14 - 1.34%) to the adequate range (2.63 - 2.99%) at the two sites. An application of P and K affected neither shoot K nor P concentrations nor GY at Kisawasawa site. It is recommended that 10 kg P/ha and 50 kg K/ha be used as optimum rate for rice production in P and K deficient soils of Kilombero valley.},
year = {2017}
}
TY - JOUR T1 - Optimum Levels of Phosphorus and Potassium for Rice in Lowland Areas of Kilombero District, Tanzania AU - Asheri Mwamba Kalala AU - Nyambilila Abdallah Amuri AU - Johnson Mashambo Semoka Y1 - 2017/02/27 PY - 2017 N1 - https://doi.org/10.11648/j.aff.20170601.14 DO - 10.11648/j.aff.20170601.14 T2 - Agriculture, Forestry and Fisheries JF - Agriculture, Forestry and Fisheries JO - Agriculture, Forestry and Fisheries SP - 26 EP - 33 PB - Science Publishing Group SN - 2328-5648 UR - https://doi.org/10.11648/j.aff.20170601.14 AB - The optimal recommended rates of phosphorus (P) and potassium (K) in the Kilombero valley, Tanzania are outdated. The Objective of the study was to establish optimum rates of P and K for improved rice cultivation in rice fields of Kilombero valley. Two on-farm experiments were carried out in two seasons of January to May 2014 and 2015 at Mkula, Mbasa and Kisawasawa sites in Kilombero district, Tanzania. In the first experiment the treatments were a control for P; adequate levels of N and K plus two rates of phosphorus 10 and 20 kg P /ha. In the second experiment the treatments were a control for K; and two rates of K of either 50 or 100 kg/ha. These three treatments each received adequate levels of N, P and Zn. An absolute control and a control for N treatments were included in both of the experiments. The test crop was rice variety SARO-5. Phosphorus application significantly increased grain yield (GY) by 3.26 and 2.01 t/ha at Mbasa and Mkula, respectively. Also P application increased shoot P concentration from a low level (0.12%) to the adequate range (0.19 - 0.24%) at the two sites. Potassium application increased significantly GY by 2.76 and 1.93 t/ha at Mbasa and Mkula, respectively. Also K application increased shoot K concentration from a low range (1.14 - 1.34%) to the adequate range (2.63 - 2.99%) at the two sites. An application of P and K affected neither shoot K nor P concentrations nor GY at Kisawasawa site. It is recommended that 10 kg P/ha and 50 kg K/ha be used as optimum rate for rice production in P and K deficient soils of Kilombero valley. VL - 6 IS - 1 ER -
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