Vol. 10, Issue 5 (2021)

Author(s):
M Yamini, V Munaswamy, KV Naga Madhuri and Y Reddi Ramu

Abstract:
A field experiment was conducted to know the influence of P fractions on P uptake, yield and nutrient content. The nutrient uptake in plant at harvest was recorded the N uptake in plant was varied from 32.92 to 87.52 kg ha^-1 and the P uptake was 8.09 to 25.23 kg ha^-1 and the K uptake in plant was ranged from 26.64 to 76.26 kg ha^-1. The NPK content in plant was varied from 1.39 to 1.81%, 0.37 to 0.54% and 1.18 to 1.72% respectively. The pod yield of ground nut at harvest was ranged from 1099 to 2683 kg ha^-1. The haulm yield of groundnut was ranged from 2019 to 4889 kg ha^-1. Before sowing pod yield was positively correlated with the P fractions like Al-p (0.536^**), Fe-P (0.470^**), Occluded P (0.540^**), Ca-P (0.515^**), organic P (0.314^*) and total P (0.380^*). At harvest positive relationship between the pod yield with the P fractions except with the Ca-P (0.033). Before sowing while the P uptake did not correlate with the Al-P (0.130), Fe-P (0.184), Occluded P (0.112), Ca-P (0.117), negative relation with the organic P (-0.403^**) was observed. At harvest P uptake was not correlated with any of the fraction but negative relationship with the organic P (-0.320^*).