N2 Fixation by Soybean in the Nigerian Moist Savanna: Effects of Maturity Class and Phosphorus Fertilizer
A study was carried out to determine the effect of P fertilizer and maturity class (days to maturity) on nodulation and N2 fixation by soybean in the Nigerian moist savanna (NMS). One early (TGx1485-1D), one medium (TGx536-02D), and two late (TGx923-2E and TGx1670-1F) soybean varieties were sown at...
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| Format: | Article |
| Language: | English |
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Presses Agronomiques de Gembloux
2006-01-01
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| Series: | Tropicultura |
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| Online Access: | http://www.tropicultura.org/text/v24n4/193.pdf |
| _version_ | 1818143915955453952 |
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| author | Ogoke, IJ. Togun, AO. Carsky, RJ. Dashiell, KE. |
| author_facet | Ogoke, IJ. Togun, AO. Carsky, RJ. Dashiell, KE. |
| author_sort | Ogoke, IJ. |
| collection | DOAJ |
| description | A study was carried out to determine the effect of P fertilizer and maturity class (days to maturity) on nodulation and N2 fixation by soybean in the Nigerian moist savanna (NMS). One early (TGx1485-1D), one medium (TGx536-02D), and two late (TGx923-2E and TGx1670-1F) soybean varieties were sown at four sites in NMS with P application rates of 0, 30 and 60 kg. ha-1. Nodulation increased with days to maturity and P rate. In late varieties, application of P substantially increased number of nodules.plant-1 by 84-134%, and nodule dry weight.plant-1 by 20-50%. Increasing P rate significantly increased specific nodulation (number of nodules per root dry weight) by 24-39% for all varieties but depressed nodule mass to whole plant mass ratio in medium and late varieties. Weight nodule-1 significantly reduced with increasing P rate and days to maturity class. Although nodule efficiency (g N fixed/nodule g weight) increased with P rate and days to maturity, only in medium (TGx536-02D) and late (TGx1670-1F) varieties was it significantly increased with P application. Over all varieties, P application significantly increased nodule efficiency by 6-10%. At harvest, N derived from the atmosphere was 61- 83 kg.ha-1 in early and medium varieties, and 78- 109 kg.ha-1 in late varieties. It increased significantly by 100-148% when P was applied. With an initial available soil P content < 7 mg.kg-1 at most sites, N2 fixation increased in soybean with application of P and days to maturity. |
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| id | doaj.art-bec0a13d42154e01bbb895a1d10fffa8 |
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| issn | 0771-3312 |
| language | English |
| last_indexed | 2024-12-11T11:39:16Z |
| publishDate | 2006-01-01 |
| publisher | Presses Agronomiques de Gembloux |
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| series | Tropicultura |
| spelling | doaj.art-bec0a13d42154e01bbb895a1d10fffa82022-12-22T01:08:39ZengPresses Agronomiques de GemblouxTropicultura0771-33122006-01-01244193199N2 Fixation by Soybean in the Nigerian Moist Savanna: Effects of Maturity Class and Phosphorus FertilizerOgoke, IJ.Togun, AO.Carsky, RJ.Dashiell, KE.A study was carried out to determine the effect of P fertilizer and maturity class (days to maturity) on nodulation and N2 fixation by soybean in the Nigerian moist savanna (NMS). One early (TGx1485-1D), one medium (TGx536-02D), and two late (TGx923-2E and TGx1670-1F) soybean varieties were sown at four sites in NMS with P application rates of 0, 30 and 60 kg. ha-1. Nodulation increased with days to maturity and P rate. In late varieties, application of P substantially increased number of nodules.plant-1 by 84-134%, and nodule dry weight.plant-1 by 20-50%. Increasing P rate significantly increased specific nodulation (number of nodules per root dry weight) by 24-39% for all varieties but depressed nodule mass to whole plant mass ratio in medium and late varieties. Weight nodule-1 significantly reduced with increasing P rate and days to maturity class. Although nodule efficiency (g N fixed/nodule g weight) increased with P rate and days to maturity, only in medium (TGx536-02D) and late (TGx1670-1F) varieties was it significantly increased with P application. Over all varieties, P application significantly increased nodule efficiency by 6-10%. At harvest, N derived from the atmosphere was 61- 83 kg.ha-1 in early and medium varieties, and 78- 109 kg.ha-1 in late varieties. It increased significantly by 100-148% when P was applied. With an initial available soil P content < 7 mg.kg-1 at most sites, N2 fixation increased in soybean with application of P and days to maturity.http://www.tropicultura.org/text/v24n4/193.pdfN fixationNodulationNodule efficiencyCropping systemNigeria |
| spellingShingle | Ogoke, IJ. Togun, AO. Carsky, RJ. Dashiell, KE. N2 Fixation by Soybean in the Nigerian Moist Savanna: Effects of Maturity Class and Phosphorus Fertilizer Tropicultura N fixation Nodulation Nodule efficiency Cropping system Nigeria |
| title | N2 Fixation by Soybean in the Nigerian Moist Savanna: Effects of Maturity Class and Phosphorus Fertilizer |
| title_full | N2 Fixation by Soybean in the Nigerian Moist Savanna: Effects of Maturity Class and Phosphorus Fertilizer |
| title_fullStr | N2 Fixation by Soybean in the Nigerian Moist Savanna: Effects of Maturity Class and Phosphorus Fertilizer |
| title_full_unstemmed | N2 Fixation by Soybean in the Nigerian Moist Savanna: Effects of Maturity Class and Phosphorus Fertilizer |
| title_short | N2 Fixation by Soybean in the Nigerian Moist Savanna: Effects of Maturity Class and Phosphorus Fertilizer |
| title_sort | n2 fixation by soybean in the nigerian moist savanna effects of maturity class and phosphorus fertilizer |
| topic | N fixation Nodulation Nodule efficiency Cropping system Nigeria |
| url | http://www.tropicultura.org/text/v24n4/193.pdf |
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