Inorganic and microbial fertilizers enhance growth and yield of mungbean (Vigna radiata L. Wilczek) and peanut (Arachis hypogaea L.) in acid soil
2018
Azogue, H.R. | Magnaye, A.M.A. | Salazar, B.M. | Sta Cruz, P.C.
Acid soils offer unfavorable growing conditions to legumes in a variety of ways, such as rendering nutrients unavailable for plant uptake and hindering soil microorganisms with which legumes form symbiotic associations with, and these often results in poor plant growth and low yield. Inorganic fertilizer application and enhancement of microbial activity in the soil can be explored to improve yield of legumes in acid soils. Hence, a two-season experiment was conducted in the UP Laguna-Quezon Land Grant in 2017 to evaluate the response of peanut and mungbean to inorganic and biofertilizers in highly acidic soil condition (pH 4.3-4.5). Peanut (var. Biyaya 16) and mungbean (var. Pag-asa 3 and Pag-asa 7) were planted under five fertilizer treatments: 0% recommended rate (RR) of inorganic fertilizer, 50% RR, 100%RR, 50%RR+VAMRI, and 50%RR+NitroPlus. Across cropping seasons, peanut applied with 50%RR+VAMRI had highest shoot biomass, and had 12.76% and 30.49% more pod yield than plants with 50%RR and 100%RR respectively. Root biomass was highest in fully fertilized peanut followed 50%RR + either VAMRI or NitroPlus. In mungbean, 100%RR resulted in significantly highest shoot and root biomass in wet season. Relative to 50%RR+NitroPlus increased shoot weight by 242% and root weight by 81.83%, while 50% RR + VAMRI resulted in 46.47% more about and 14.80% more roots. In wet season, 50% RR+NitroPlus application enhanced yield by 5-10x relative to 0% and 50%RR, and was only 20% lower than yield of plants applied with 100% RR, VAMRI and NitroPlus. These show the potential of inorganic and microbial fertilizers in enhancing growth and yield of peanut and mungbean in acidic soil condition.
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