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Persistent Identifier
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doi:10.7910/DVN/23874 |
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Publication Date
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2013-12-17 |
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Title
| Evaluation of Biofertilizers in Irrigated Rice: Effects on Grain Yield at Different Fertilizer Rates |
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Author
| Banayo, Nino Paul MeynardIRRI-CESD
Sta. Cruz, PompeCrop Science Cluster, College of Agriculture (CA), University of the Philippines at Los Banos
Aguilar, EdnaCrop Science Cluster, College of Agriculture (CA), University of the Philippines at Los Banos
Badayos, RodrigoAgricultural Systems Cluster, College of Agriculture (CA), University of the Philippines at Los Banos
Haefele, StephanIRRI-CESD |
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Point of Contact
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Use email button above to contact.
Nino Paul Meynard Banayo (IRRI-CESD) |
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Description
| Biofertilizers are becoming increasingly popular in many countries and for many crops, but very few studies on their effect on grain yield have been conducted in rice. Therefore, we evaluated three different biofertilizers (based on Azospirillum, Trichoderma, or unidentified rhizobacteria) in the Philippines during four cropping seasons between 2009 and 2011, using four different fertilizer rates (100% of the recommended rate [RR], 50% RR, 25% RR, and no fertilizer as Control). The experiments were conducted under fully irrigated conditions in a typical lowland rice environment. Significant yield increases due to biofertilizer use were observed in all experimental seasons with the exception of the 2008/09 DS. However, the effect on rice grain yield varied between biofertilizers, seasons, and fertilizer treatments. In relative terms, the seasonal yield increase across fertilizer treatments was between 5% and 18% for the best biofertilizer (Azospirillum-based), but went up to 24% in individual treatments. Absolute grain yield increases due to biofertilizer were usually below 0.5 t/ha, corresponding to an estimated additional N uptake of less than 7.5 kg N/ha. The biofertilizer effect on yield did not significantly interact with the inorganic fertilizer rate used but the best effects on grain yield were achieved at low to medium fertilizer rates. Nevertheless, positive effects of the biofertilizers even occurred at grain yields up to 5 t/ha. However, the trends in our results seem to indicate that biofertilizers might be most helpful in rainfed environments with limited inorganic fertilizer input. However, for use in these target environments, biofertilizers need to be evaluated under conditions with abiotic stresses typical of such systems such as drought, soil acidity, or low soil fertility. |
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Keyword
| Azospirillum |
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Notes
| Subject: null Type: CESD Notes: ; |
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Production Date
| 2010 |
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Distributor
| Agriculture http://www.mdpi.com/journal/agriculture |
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Distribution Date
| 2012 |
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Depositor
| Jean Sabado |
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Deposit Date
| 2013-12-11 |
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Date of Collection
| Start Date: 2008; End Date: 2011 |
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Related Dataset
| Fairhurst, T.H.; Witt, C.; Buresh, R.J.; Dobermann, A. A Practical Guide to Nutrient Management, 2nd ed.; International Rice Research Institute, International Plant Nutrition Institute, and the International Potash Institute: Singapore, 2007; p. 89.; Witt, C.; Buresh, R.J.; Peng, S.; Balasubramanian, V.; Dobermann A. Nutrient management. In Rice: A Practical Guide to Nutrient Management; Fairhurst, T.H., Witt, C., Buresh, R.J., Dobermann, A., Eds.; International Rice Research Institute, International Plant Nutrition Institute, and the International Potash Institute: Singapore, 2007; pp. 1âÃÂÃÂ45. |
