Combined application of biofertilizers and inorganic nutrients improves sweet potato yields
Sweet potato [Ipomoea batatas (L) Lam] yields currently stand at 4.5 t ha−1 on smallholder farms in Uganda, despite the attainable yield (45–48 t ha−1) of NASPOT 11 cultivar comparable to the potential yield (45 t ha−1) in sub-Saharan Africa (SSA). On-farm field experiments were conducted for two se...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Frontiers Media
2017
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/80559 |
| _version_ | 1855542844060598272 |
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| author | Mukhongo, Ruth Wilhem Tumuhairwe, J.B. Ebanyat, Peter AbdelGadir, Abdel Aziz H. Thuita, Moses N. Masso, C. |
| author_browse | AbdelGadir, Abdel Aziz H. Ebanyat, Peter Masso, C. Mukhongo, Ruth Wilhem Thuita, Moses N. Tumuhairwe, J.B. |
| author_facet | Mukhongo, Ruth Wilhem Tumuhairwe, J.B. Ebanyat, Peter AbdelGadir, Abdel Aziz H. Thuita, Moses N. Masso, C. |
| author_sort | Mukhongo, Ruth Wilhem |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Sweet potato [Ipomoea batatas (L) Lam] yields currently stand at 4.5 t ha−1 on smallholder farms in Uganda, despite the attainable yield (45–48 t ha−1) of NASPOT 11 cultivar comparable to the potential yield (45 t ha−1) in sub-Saharan Africa (SSA). On-farm field experiments were conducted for two seasons in the Mt Elgon High Farmlands and Lake Victoria Crescent agro-ecological zones in Uganda to determine the potential of biofertilizers, specifically arbuscular mycorrhizal fungi (AMF), to increase sweet potato yields (NASPOT 11 cultivar). Two kinds of biofertilizers were compared to different rates of phosphorus (P) fertilizer when applied with or without nitrogen (N) and potassium (K). The sweet potato response to treatments was variable across sites (soil types) and seasons, and significant tuber yield increase (p < 0.05) was promoted by biofertilizer and NPK treatments during the short-rain season in the Ferralsol. Tuber yields ranged from 12.8 to 20.1 t ha−1 in the Rhodic Nitisol (sandy-clay) compared to 7.6 to 14.9 t ha−1 in the Ferralsol (sandy-loam) during the same season. Root colonization was greater in the short-rain season compared to the long-rain season. Biofertilizers combined with N and K realized higher biomass and tuber yield than biofertilizers alone during the short-rain season indicating the need for starter nutrients for hyphal growth and root colonization of AMF. In this study, N0.25PK (34.6 t ha−1) and N0.5PK (32.9 t ha−1) resulted in the highest yield during the long and the short-rain season, respectively, but there was still a yield gap of 11.9 and 13.6 t ha−1 for the cultivar. Therefore, a combination of 90 kg N ha−1 and 100 kg K ha−1 with either 15 or 30 kg P ha−1 can increase sweet potato yield from 4.5 to >30 t ha−1. The results also show that to realize significance of AMF in nutrient depleted soils, starter nutrients should be included. |
| format | Journal Article |
| id | CGSpace80559 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Frontiers Media |
| publisherStr | Frontiers Media |
| record_format | dspace |
| spelling | CGSpace805592025-11-11T11:07:27Z Combined application of biofertilizers and inorganic nutrients improves sweet potato yields Mukhongo, Ruth Wilhem Tumuhairwe, J.B. Ebanyat, Peter AbdelGadir, Abdel Aziz H. Thuita, Moses N. Masso, C. arbuscular mycorrhizal drought stress root colonization sweet potato yield gap nutrient concentration biofertilizers Sweet potato [Ipomoea batatas (L) Lam] yields currently stand at 4.5 t ha−1 on smallholder farms in Uganda, despite the attainable yield (45–48 t ha−1) of NASPOT 11 cultivar comparable to the potential yield (45 t ha−1) in sub-Saharan Africa (SSA). On-farm field experiments were conducted for two seasons in the Mt Elgon High Farmlands and Lake Victoria Crescent agro-ecological zones in Uganda to determine the potential of biofertilizers, specifically arbuscular mycorrhizal fungi (AMF), to increase sweet potato yields (NASPOT 11 cultivar). Two kinds of biofertilizers were compared to different rates of phosphorus (P) fertilizer when applied with or without nitrogen (N) and potassium (K). The sweet potato response to treatments was variable across sites (soil types) and seasons, and significant tuber yield increase (p < 0.05) was promoted by biofertilizer and NPK treatments during the short-rain season in the Ferralsol. Tuber yields ranged from 12.8 to 20.1 t ha−1 in the Rhodic Nitisol (sandy-clay) compared to 7.6 to 14.9 t ha−1 in the Ferralsol (sandy-loam) during the same season. Root colonization was greater in the short-rain season compared to the long-rain season. Biofertilizers combined with N and K realized higher biomass and tuber yield than biofertilizers alone during the short-rain season indicating the need for starter nutrients for hyphal growth and root colonization of AMF. In this study, N0.25PK (34.6 t ha−1) and N0.5PK (32.9 t ha−1) resulted in the highest yield during the long and the short-rain season, respectively, but there was still a yield gap of 11.9 and 13.6 t ha−1 for the cultivar. Therefore, a combination of 90 kg N ha−1 and 100 kg K ha−1 with either 15 or 30 kg P ha−1 can increase sweet potato yield from 4.5 to >30 t ha−1. The results also show that to realize significance of AMF in nutrient depleted soils, starter nutrients should be included. 2017-03-13 2017-03-30T11:59:31Z 2017-03-30T11:59:31Z Journal Article https://hdl.handle.net/10568/80559 en Open Access application/pdf Frontiers Media Mukhongo, R.W., Tumuhairwe, J.B., Ebanyat, P., AbdelGadir, A.H., Thuita, M. & Masso, C. (2017). Combined application of biofertilizers and inorganic nutrients improves sweet potato yields. Frontiers in Plant Science, 8(219) 1-17. |
| spellingShingle | arbuscular mycorrhizal drought stress root colonization sweet potato yield gap nutrient concentration biofertilizers Mukhongo, Ruth Wilhem Tumuhairwe, J.B. Ebanyat, Peter AbdelGadir, Abdel Aziz H. Thuita, Moses N. Masso, C. Combined application of biofertilizers and inorganic nutrients improves sweet potato yields |
| title | Combined application of biofertilizers and inorganic nutrients improves sweet potato yields |
| title_full | Combined application of biofertilizers and inorganic nutrients improves sweet potato yields |
| title_fullStr | Combined application of biofertilizers and inorganic nutrients improves sweet potato yields |
| title_full_unstemmed | Combined application of biofertilizers and inorganic nutrients improves sweet potato yields |
| title_short | Combined application of biofertilizers and inorganic nutrients improves sweet potato yields |
| title_sort | combined application of biofertilizers and inorganic nutrients improves sweet potato yields |
| topic | arbuscular mycorrhizal drought stress root colonization sweet potato yield gap nutrient concentration biofertilizers |
| url | https://hdl.handle.net/10568/80559 |
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