Effect of Rhizobium inoculation and NP fertilization on growth, yield and nodulation of soybean (Glycine max L.) in the sub-humid hilly region of Rawalakot Azad Jammu and Kashmir, Pakistan
This research experiment was conducted to examine the effect of Rhizobium inoculation (RI) and P fertilization (P) on nodulation, growth and yield characteristics of soybean grown in the presence of starter N fertilizer (N). Treatments included: i) 02 levels of RI (RI sub(0), RI sub(1)), ii) 02 leve...
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| Published in: | African journal of biotechnology Vol. 8; no. 22; pp. 6191 - 6200 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
16-11-2009
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | This research experiment was conducted to examine the effect of Rhizobium inoculation (RI) and P fertilization (P) on nodulation, growth and yield characteristics of soybean grown in the presence of starter N fertilizer (N). Treatments included: i) 02 levels of RI (RI sub(0), RI sub(1)), ii) 02 levels of P (P sub(0), P sub(1) that is, P sub(2)O sub(5) at 90 kg ha super(-1)) iii) 03 levels of N (N sub(0), N sub(1) and N sub(2) that is, N at of 25 and 50 kg N ha super(-1)) iv) 03 replication. Results of the experiment revealed that total number of nodules increased from 73 in the un-inoculated control to 125 and 95 following the application of RI and P representing 70 and 30% increase over control. N supply did not affect the number of nodules; however, combination of RI and P with 25 kg N ha super(-1) (RI sub(1)P sub(1)N sub(1)) produced the highest number of nodules (152). RI, P, N and their combinations increased shoot and root biomass. Seed yield in the control was 767 kg ha super(-1) that significantly increased to 1081, 907 and 940 kg ha super(-1) following the application of RI, P and N demonstrating a 41, 18 and 23% increase over control. The highest seed yield of 1208 kg ha super(-1) was recorded in the combine treatment of RI sub(1)P sub(1)N sub(1) indicating 57% increase over control. Relative increase in dry matter yield due to RI, P and N was 63, 46 and 49%. Seed protein content in different treatments ranged between 33 - 40% while oil content ranged between 13 - 18%. Application of RI, P and their combinations increased protein content by 6 - 22% while increase in oil content was 12 - 35%. Concentrations of N and P in plants and their uptake was significantly increased and relative increase in N uptake due to RI, P and K was 77, 21 and 31%, respectively, while the corresponding increase in P uptake was 79, 92 and 56%. It was found that the efficiency of RI and P fertilization increased substantially with the application of 25 kg N ha super(-1) but the efficiency decreased when N supply increased from 25 kg N ha super(-1) to 50 kg N ha super(-1). The results demonstrate the potential benefits of using Rhizobium inoculation and P fertilization with reduced level of N as starter fertilizer in order to achieve plant-growth promotion, increased nodulation and seed yield of soybean. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 1684-5315 1684-5315 |
| DOI: | 10.5897/AJB09.1039 |