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Dissolution of Dominant Soil Phosphorus Fractions in Phosphorus-Responsive Soils of Bihar, India: Effects of Mycorrhiza and Fertilizer Levels

Beura, Kasturikasen, Singh, Mahendra, Pradhan, Amit Kumar, Rakshit, Rajiv, Lal, Manohar
Communications in soil science and plant analysis 2019 v.50 no.3 pp. 287-294
Glomus, acid soils, alkaline soils, corn, fertilizer rates, hydrochloric acid, mycorrhizal fungi, phosphorus, potassium chloride, sodium hydroxide, vesicular arbuscular mycorrhizae, India
We investigated the effects of Arbuscular Mycorrhiza (AM) fungi and various phosphorus (P) levels on the distribution and availability of P in dominant soils of Bihar, India. Potassium chloride (KCl)-P (labile P), sodium hydroxide (NaOH)-P (Fe-Al-bound P), hydrochloric acid (HCl)-P (Ca-bound P), and residual P (Res-P) fractions were analyzed in the soils under maize plant. Ca-bound P was the most abundant P fraction in the alkaline soils (65% of the total P) followed by neutral soil (35% of the total P), whereas it was less abundant (<4%) in the acidic soil type. Fe-Al-bound P was found to be highest for acidic soil (65% of the total P). Soils under the inoculation with Glomus mossae and control gave the highest and lowest values (15.63 mg kg⁻¹ and 10.74 mg kg⁻¹ respectively) for the labile fraction which was similar to the organically bound residual fractions of P (200.17 mg kg⁻¹ and 193.66 mg kg⁻¹ respectively. Inoculation of the soils with AM fungi leads to the redistribution of P fractions in different soils which consequently helps in improvement of available P in soil conducive for plant uptake.