Vol. 7, Issue 2 (2019)
Use of Udaipur rock phosphate with different amendments in improving phosphorus availability and hybrid Napier grass yield in acid soils of Odisha, India
Author(s): Debasis Sarangi, Dinabandhu Jena and Goura Hari Santra
Abstract: A pot culture study was conducted during February, 2014 to evaluate the effect of Udaipur Rock Phosphate (URP) alone or in combination with amendments like farmyard manure, PSB, lime or SSP on yield, P and Ca uptake by hybrid Napier grass in three different acid soils (Typic Halpludalf) in Odisha, India. The experiment was conducted in a completely randomized design (CRD) with three replications and 18 treatments consists of 3 low pH soils - S1 (pH-4.15), S2 (pH-5.03), S3 (pH-5.82) and six rock phosphate treatments - T1-Control, T2-200%P through URP, T3-50%P through URP+50%P through SSP,T4- 100% P through URP +FYM @ 5thaˉ1, T5-100%P through URP +PSB @ 10 kg haˉ1 and T6-100% P through URP + lime @ 0.2 LR (Lime Requirement).The URP contains 7.8% total P, 25.6% Ca,0.26%Mg and 0.24% K indicating a moderate reactive material. The first cut was made after 60 days after planting and subsequently seven cuts were made at an interval of 45 days. The results showed that the available P in URP treatments increased over the initial value, attained its peak at 2nd cutting, there after declined but remained above the initial value upto 8th cutting. Application of URP @ 200 % P recorded higher biomass yield and RAE by hybrid Napier grass in lower pH soils (S1 and S2) whereas, URP+SSP recorded maximum yield in S3. Phosphorus, Ca and S uptake by hybrid Napier grass were highest in URP+SSP followed by URP and URP + lime. There were significant correlations between soil available P and total P uptake (R2 = 0.946**), P uptake and biomass yield (R2 =0.963**) and available P and biomass yield (R2 = 0.969**). Significant correlationship between Ca uptake and biomass yield (R2 = 0.964**) and S uptake and biomass yield (R2 = 0.941**) were also observed. The rate of dissolution of phosphate rock as indicated by soil pH, available P and Ca was maximum in low pH soil and safely recommended for crop production as against costly water soluble P fertilizer.
Pages: 2150-2164 | 354 Views 75 Downloads
download (14838KB)
How to cite this article:
Debasis Sarangi, Dinabandhu Jena, Goura Hari Santra. Use of Udaipur rock phosphate with different amendments in improving phosphorus availability and hybrid Napier grass yield in acid soils of Odisha, India. Int J Chem Stud 2019;7(2):2150-2164.
