Abstract
In the Philippines, native corn substitutes rice during rice scarcity which makes it the second
most important staple crop. Japanese snail is considered an economically important mollusk pest
but is known to address plant growth problems when used as amino acid fertilizer. The study
compared seaweed residue, bamboo shoot residue, Japanese snail residue and their combination
with organic pesticide, Guduchi, to commercially available compost fertilizer (10t/ha). These
were done in three replications arranged in Randomized Complete Block Design. Photosynthetic
parameters were measured using LI-6800 Portable Photosynthesis System. Application of
Japanese snail residue improved height from 4th to 8th week by 67.53 cm. Bamboo shoot residue
also showed effectiveness in improving the plant height on the 8th week at 139.13±6.28SD cm.
On leaf length, Japanese snail residue outperformed the commercial basal organic fertilizer from
the second up to the eighth week by 38.5 cm. On reproductive stage, Japanese snail showed the
highest weight of ears at 86.6± 20.36SD g and is comparable with seaweed residue in the weight
of kernels per ear at 69.60± 1.48SD g. However, in the computed yield, Japanese snail fertilizer
has the lowest at 2.13±09SD g but the combination of pesticide and Japanese snail obtained the
highest at 3.33±04SD g. Seaweed residue alone attained the highest transpiration rate and the
lowest assimilation rate at 1604168655.67±191.66SD µmol H2O m-2 s-1 and 13.16±0.69SD
µmol CO2 m-2 s-1, respectively while the combination of Japanese snail and Guduchi was the
one that improved stomatal conductance to CO2 and the total conductance to CO2 at
478.6350±34.82SD μmol mol¯ and 47.5083±3.55SD Pa. Japanese snail residue has the lowest
vapor pressure deficit at leaf temperature at 4.54±0.02SD kPa which showed significantly strong
correlation with increase leaf length and plant height. Hence, Japanese snail residue fertilizer has
the potential to be used as solid organic fertilizer for the growth of indigenous corn.
Nonna Fatima H. Abello, Edivine E. Remedios, Danny E. Carabio, Valerie U. Pascual, Pet Roey L. Pascual. (2021) Fermented Japanese Snail Fertilizer Reduced Vapor Pressure Deficit Which Improves Indigenous Corn Growth (Zea mays var. Tiniguib), Asian Journal of Agriculture and Biology, Volume-09, Issue-2.
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