Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil
Soil extractable Bray-1 P (B1P) and response to phosphate (P) of Setaria anceps cv. Kazungula (Setaria grass) were monitored in a field trial bimonthly for 14 months in an acid soil fertilized with triple super phosphate (TSP), Gafsa phosphate rock (GPR) or Christmas Island phosphate rock (CIPR) int...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
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Springerlink
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/6315/1/Extractable%20Bray.pdf |
| _version_ | 1796967139965403136 |
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| author | Gikonyo, Esther Wakiuru Abdul Rahman, Zaharah Musa, Mohamed Hanafi Abd Rahim, Anuar |
| author_facet | Gikonyo, Esther Wakiuru Abdul Rahman, Zaharah Musa, Mohamed Hanafi Abd Rahim, Anuar |
| author_sort | Gikonyo, Esther Wakiuru |
| collection | UPM |
| description | Soil extractable Bray-1 P (B1P) and response to phosphate (P) of Setaria anceps cv. Kazungula (Setaria grass) were monitored in a field trial bimonthly for 14 months in an acid soil fertilized with triple super phosphate (TSP), Gafsa phosphate rock (GPR) or Christmas Island phosphate rock (CIPR) integrated with or without manure. Extractable B1P from the same soil incubated with the same fertilizers in wet and dry 3-day cycles for 91 days was determined. Field experimental design was randomized complete block (RCB) with three replications. Results indicated that B1P magnitude for field and incubation trial were; TSP > GPR > CIPR, consistent with their solubility. An integration of manure and fertilizers resulted in much higher extractable B1P than sole fertilizers or manure. Over time, P availability decreased at a fast rate for the first 6 months and later was relatively constant. The dry matter yields (DMYs) exhibited quadratic relationships with P rates. Maximum DMYs (6-11 t ha-1) were attained between 100 and 200 kg P ha-1, above which they declined. Average DMYs were not significantly different for TSP, GPR and CIPR (6.1-6.6 t ha-1). Maximum individual DMY were attained at 2-6 months and then declined to a minimum (2-4 t ha-1) after 1 year. Cumulative yields (20-55 t ha-1) also were not significantly different for the three fertilizers. Manure-CIPR integration increased DMY whilst in GPR and TSP/manure combinations DMYs were depressed. The PRs could supplement the expensive TSP without loss of yields but the non-reactive PR should be integrated with manure. © 2009 Springer Science+Business Media B.V. |
| first_indexed | 2024-03-06T07:09:33Z |
| format | Article |
| id | upm.eprints-6315 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:09:33Z |
| publishDate | 2009 |
| publisher | Springerlink |
| record_format | dspace |
| spelling | upm.eprints-63152015-11-30T06:36:04Z http://psasir.upm.edu.my/id/eprint/6315/ Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil Gikonyo, Esther Wakiuru Abdul Rahman, Zaharah Musa, Mohamed Hanafi Abd Rahim, Anuar Soil extractable Bray-1 P (B1P) and response to phosphate (P) of Setaria anceps cv. Kazungula (Setaria grass) were monitored in a field trial bimonthly for 14 months in an acid soil fertilized with triple super phosphate (TSP), Gafsa phosphate rock (GPR) or Christmas Island phosphate rock (CIPR) integrated with or without manure. Extractable B1P from the same soil incubated with the same fertilizers in wet and dry 3-day cycles for 91 days was determined. Field experimental design was randomized complete block (RCB) with three replications. Results indicated that B1P magnitude for field and incubation trial were; TSP > GPR > CIPR, consistent with their solubility. An integration of manure and fertilizers resulted in much higher extractable B1P than sole fertilizers or manure. Over time, P availability decreased at a fast rate for the first 6 months and later was relatively constant. The dry matter yields (DMYs) exhibited quadratic relationships with P rates. Maximum DMYs (6-11 t ha-1) were attained between 100 and 200 kg P ha-1, above which they declined. Average DMYs were not significantly different for TSP, GPR and CIPR (6.1-6.6 t ha-1). Maximum individual DMY were attained at 2-6 months and then declined to a minimum (2-4 t ha-1) after 1 year. Cumulative yields (20-55 t ha-1) also were not significantly different for the three fertilizers. Manure-CIPR integration increased DMY whilst in GPR and TSP/manure combinations DMYs were depressed. The PRs could supplement the expensive TSP without loss of yields but the non-reactive PR should be integrated with manure. © 2009 Springer Science+Business Media B.V. Springerlink 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/6315/1/Extractable%20Bray.pdf Gikonyo, Esther Wakiuru and Abdul Rahman, Zaharah and Musa, Mohamed Hanafi and Abd Rahim, Anuar (2009) Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil. Nutrient Cycling in Agroecosystems, 88 (1). pp. 1-12. ISSN 1385-1314 http://dx.doi.org/10.1007/s10705-009-9332-1 10.1007/s10705-009-9332-1 English |
| spellingShingle | Gikonyo, Esther Wakiuru Abdul Rahman, Zaharah Musa, Mohamed Hanafi Abd Rahim, Anuar Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil |
| title | Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil |
| title_full | Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil |
| title_fullStr | Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil |
| title_full_unstemmed | Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil |
| title_short | Extractable Bray-1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil |
| title_sort | extractable bray 1 phosphorus and crop yields as influenced by addition of phosphatic fertilizers of various solubilities integrated with manure in an acid soil |
| url | http://psasir.upm.edu.my/id/eprint/6315/1/Extractable%20Bray.pdf |
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