Microalgal liquid biofertilizer and biostimulant effect on green gram (Vigna radiataL) an experimental cultivation

Microalgae-based biofertilizers have been proven to be very successful and an alternate source for agricultural sectors in reducing the usage of harmful chemical fertilizers. Focusing on this, liquid biofertilizer extracts of Chlorella vulgarisand Spirulina platensisare used to improve the growth of green gram Vigna radiata(L.). The microalgal extracts of Chlorella vulgarisand Spirulina platensisshowed maximum chemical composition and elemental contents. Growth parameters of shoot, root length, and weight of green gram (Vigna radiata) at flowering stage were found to be at a higher level with treatments I and II. Similarly, maximum number of fresh weights of root nodules, plant heights, plant branches, plant leaves, and leaf area index were recorded as 100% with treatment I of Chlorella vulgarisand treatment II of Spirulina platensisin treated plants. The leaf chemical composition such as N, P, and K, total carbohydrates, Indole, and phenol evidenced with good results in plants treated with Chlorella vulgarisand Spirulina platensis.The soil characterisstics such as pH, EC (ds/m), Ca++, Na+, Mg++, K+, CO−3, Cl−, HCO−3, and So4and physical characteristics of green gram including water absorption index, water solubility index, water absorption, and oil absorption were observed in superior level in microalgae-treated plants. The proximate composition and mineral composition of green gram seed flour were also recorded to be higher with Chlorella vulgarisand Spirulina platensistreatments. The antinutritional factors and phytohaemagglutinating activities of green gram were also found to be higher in microalgal-treated plants. Thus, the implications of Chlorella vulgarisas well as Spirulina platensiswere proven to be pros of liquid biofertilizers in the production of green gram.