Enhanced assimilation rate due to seaweed biostimulant improves growth and yield of rice bean (Vigna umbellata)
Laen...
Kuupäev
2021
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Rice beans are traditionally planted as intercrop to corn or as the main crop during dry
season when corn production is difficult. The use of biostimulants is widely studied to ameliorate
the adverse effects of biotic and abiotic stresses. Three possible fermented biostimulants:
seaweed, bamboo shoot, and Japanese snail were compared to a commercial organic liquid
fertilizer (10 mL L
-1
) based on morphological, photosynthetic, and yield responses. Fermented
seaweed-treated rice bean registered the greatest average vapor pressure deficit (VPD) at
4.33 KPa on the first month and is comparable to the highest average VPD of 4.39 KPa registered
by plants applied with fermented Japanese snail on the second month. This interestingly, did not
result in difference of transpiration rate (µmol H2O m-2
s
-1
). Such could be attributed to the plants
reduced stomatal aperture when applied with fermented seaweed at 406.80 µmol CO2 mol
stomatal conductance and 38.59 Pa total conductance on the second month. Despite this, the
average carbon dioxide assimilation rate of rice beans still increased in both the first
(15.26 µmol CO2 m-2
s
-1
) and second (16.51 µmol CO2 m-2
s
-1
) month. This increased assimilation
rate of fermented seaweed-treated rice beans resulted to about 12 cm increase in height at
128.53 cm (R
2 = 0.894), 0.02 g pod-1
(R
2 = 0.978) heavier and 0.90 seeds pod-1
(R
2 = 0.978) more
when compared to those applied with the commercial liquid organic fertilizer. Thus, by limiting
stomatal conductance, despite the differences in VPD, transpiration rate was not affected while
significantly increasing assimilation rate to improve production of rice beans, thereby taking full
advantage of available seaweed by-products.
Kirjeldus
Received: March 3rd, 2021 ; Accepted: June 9th, 2021 ; Published: June 15th, 2021 ; Correspondence: petroey.pascual@ctu.edu.ph
Märksõnad
japanese snail liquid fertilizer, morphological responses, organic foliar fertilization, photosynthetic responses, articles