Vol. 5, Issue 5 (2017)
Influence of low grade rock phosphate alone and in combination with SSP on yield and nutrient uptake of maize-groundnut cropping sequence in Alfisols
Author(s): Suraj Mali and GH Santra
Abstract: A field experiment was conducted with maize-groundnut cropping sequence. Rock phosphate and its combination with Single super phosphate (SSP) were used as nutrient sources during Rabi 2016-17 (maize taken up in Kharif 2016). The study was carried out in the Central Farm, OUAT with the help of a field experiment laid out in Randomized Block Design with seven treatment T1 Control, T2 100% P(RP),T3 100% P(SSP), T4 75% P(RP) + 25% P(SSP), T5 50% P(RP) + 50% P(SSP), T6 25% P(RP) + 75% P(SSP) and T7 100% P(SSP) + Lime @ 0.2 Lime requirement (LR) and replicated in thrice. The soil of the experimental field was loamy acidic (pH 5.2) having Bray’s P of 15.68 kg ha-1. The different combinations with single super phosphate (SSP) were evaluated for their effectiveness in the cropping system. In addition to P applied @50kg P2O5 ha-1 and 40 kg P2O5 ha-1 to maize and groundnut crops respectively from various sources, N was added @ 150kg ha-1 to maize and 20 kg ha-1 to groundnut crop in the form of urea and K @50 and 40 kg K2O ha-1 was added to maize and groundnut crop in the form of murate of potash (MOP). Highest maize grain yield (5.03 t ha-1) was produced due to addition of 100%P (SSP) +Lime @0.2LR and highest pod yield (2.77 t ha-1) of groundnut was also due to 100%P (SSP)+Lime@0.2LR. Yield due to single super phosphate (SSP) and lime applied in combination was more than lone application of single super phosphate (SSP). Lone sources of rock phosphate (RP) was better in respect of pod yield of groundnut than lone sources of single super phosphate (SSP). All the combination of Rock phosphate and soluble source single super phosphate was produced better yield than lone source of single super phosphate except treatment received 25%P (RP) +75%P (SSP). The treatment 100%P (SSP) +Lime @0.2LR also recorded the highest uptake of nutrients like P, S, Ca and K.
Pages: 23-26 | 1638 Views 67 Downloads
How to cite this article:
Suraj Mali, GH Santra. Influence of low grade rock phosphate alone and in combination with SSP on yield and nutrient uptake of maize-groundnut cropping sequence in Alfisols. Int J Chem Stud 2017;5(5):23-26.