Abstract:
Organic agriculture has emerged as a major focus field globally nowadays. The
usage of chemical fertilizers alone has several adverse effects on the environment
and human wellbeing, in addition, they must be replenished on a regular basis
[1]. Organic fertilizers have been shown to improve soil fertility and increase soil
biodiversity. Spirulina Sp.extract contains nutrients, sugar, and amino acids, as
well as growth-promoting bioregulators, vitamins, amino acids, and other
secondary metabolites, all of which support plant growth, hence it has also been
recommended as a good protein source in animal feeds as well as an excellent
alternative to chemical fertilizers [2]. Cattle manure (CM) application to the
farmland has been a long-term practice in crop production worldwide. However,
the application of cattle manure alone would demand bulk application due to its
low nitrogen content. In addition, due to the present pandemic situation,
inorganic fertilizer (IN) supply is limited and there is uncertainty of future supply.
On this background two experiments were aimed, the first, to find the effect of
Spirulina Sp. in combination with CM or IN except nitrogen (INEN) on nutrient
availability in soil through a laboratory incubation study. The second experiment
was to assess their effect on growth and yield of Okra (Abelmoschus esculentus L)
local variety in a net house pot experiment study
