EFFECT OF PHOSPHORUS AND POTASH ON GROWTH, YIELD AND NUTRIENT UPTAKE BY SUMMER GROUNDNUT
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Date
2008
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MPKV, Rahuri
Abstract
The present investigation was planned to study the “effect of
phosphorus and potash on growth, yield and nutrient uptake by summer
groundnut” during summer 2007 at Post Graduate Institute Research Farm,
Mahatma Phule Krishi Vidyapeeth, Rahuri, Dist. Ahmednagar.
The experiment was laid out in Factorial Randomised Block Design
with three replications. There were three levels of phosphorus viz. 25, 50, 75 kg
P2O5 ha-1 and three levels of potash viz. 15, 30, 45 kg K2O ha-1 with absolute
control forming ten treatment combinations were under study. The gross and net
plot sizes were 6.00 x 4.80 m2 and 5.60 x 4.20 m2, respectively. The groundnut
variety TAG 24 dibbled at a distance of 30 x 10 cm on 26th February, 2007.The experimental soil was clayey in texture, low in available nitrogen
(183.76 kg N ha-1), medium in available phosphorus (19.92 kg P ha-1) and high in
available potassium (398.60 kg K ha-1) and alkaline in reaction with pH 8.1.
To determine the treatment effects, observations on growth attributes,
yield components and yields were recorded. The quality parameters viz., oil and
protein content were estimated. The NPK content in plant parts were determined
to workout NPK uptake. The soil was analysed for available NPK content before
dibbling and after harvest of groundnut.
Most of the important growth attributes viz. plant height, plant spread,
number of branches, dry matter production per plant and number of nodules and
their weight were significantly increased due to application of higher levels of 50
and 75 kg P2O5 ha-1 as compared to lower level of 25 kg P2O5 ha-1.
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