Chemical Composition of Groundnut Plant: Its Critical Growth Stages as Influenced by the use of Phosphateic and Potassic Chemical Fertilizers

Abstract

A field experiment was conducted in sandy loam typic
chromustert soil with increasing doses of phosphorus with potassium
applied to groundnut as a test crop. Groundunt crop responded
remarkably to the application of phosphorus @ 30 and 60 kg
P₂O₅ ha ^-1  applied through single superphosphate significantly increased
the dry matter yield at 50 DAS and flowering stages over
control. Similarly, artificial supplementation of potassium @ 10 and
20 kg K 20 ha^-1  in the form of muriate potash significantly and
linearly affected the dry matter yield at 50 DAS and flowering stages
over no treatment. Progressive doses of phosphorus application
significantly enhanced the N, P, K, Ca, Mg uptake at 50 DAS and
flowering stages. Similarly, increasing trends in uptake of above
plant nutrients were observed with the addition of increasing
weights of potassium. Higher levels of application contributed additional
increment in promoting the uptake as compared to lower
levels and control in both the growth stages. Interaction between P
and K was found to be positively affected in increasing dry mailer
yield and N, Ca and S uptake in both the stages.