Abstract:
A field experiment was conducted during
Kharif 2016-17 and 2017-18 respectively on sandy loam soils of the Agricultural College Farm, Bapatla to study the yield, nutrient content and nutrient uptake of groundnut as influenced by phosphorus management practices in rice-groundnut sequence. The experiment was laid out in a Split-split plot design in
rabi groundnut and the treatments were replicated thrice. The treatments consisted of four main plots residual effect of
Kharif sources and levels of phosphorus S
1 : Inorganic fertilizer phosphorus through SSP, S
2 : Green manuring
in-situ with dhaincha @ 25 kg seed ha
-1, S
3 : Biofertilizer (PSB) @ 750 ml ha
-1, S
4 : Green manuring
in-situ with dhaincha @ 25 kg seed ha
-1 + Biofertilizer (PSB) @ 750 ml ha
-1 and three subplots levels of phosphorus L
1 : 50% Recommended dose of P
, L
2 : 100% Recommended dose of P
and
L
3 : 150% Recommended dose of P. Each of the
Kharif sub
plot was divided into three sub-sub plots during
rabi season with groundnut crop and total thirty six treatments were laid out in a Split-split design
. Results of the experiment showed that residual sources and levels of phosphorus to preceeding rice crop
i.e., in-situ green manuring + PSB
showed superior performance in terms of yield, nutrient content and nutrient uptake such as nitrogen, phosphorus and potassium uptake of groundnut but was on a par with that of application of
in-situ green manuring and significantly superior over inorganic fertilizer through SSP and biofertilizer (PSB) alone during both the years and pooled data of study. During
rabi treatments among the doses of phosphorus 100 % RDP showed significantly higher yield, nutrient content and nutrient uptake of groundnut and it was on a par with 50 % RDP over control during both the years and pooled data.
M Venkata Lakshmi, Ch Pulla Rao, PVN Prasad, P Prasuna Rani and Y Ashoka Rani. Studies on yield, nutrient content and nutrient uptake of groundnut as influenced by phosphorus management practices in rice-groundnut sequence. J Pharmacogn Phytochem 2020;9(2):257-263.