Response of chickpea to micronutrients and biofertilizers in vertisol
2012
Gupta, S.C. | Sahu, Seema
Field experiment conducted during 200405 and 200506 to study the effect of micronutrientsviz., iron (FeSO4 @ 10 kg ha−1), boron (borax@10 kg ha−1), Zinc (ZnSO4 @ 25 kg ha−1), molybdenum (ammonium molybdate @ 1 kg ha−1) and joint application of all micronutrients viz., Fe+B+Zn+Mo, alone and in combination with Rhizobium+PSB inoculation on symbiotic traits, grain yield and uptake of N, P, K, S, Zn, Fe and B by chickpea crop grown with one irrigation in Vertisol having 74.8 mg kg−1 Fe, 0.02 mg kg-−1 B, 2.15 mg kg−1 Zn and 0.016 mg/kg−1 Mo in soil. Application of allmicronutrients as well as inoculation significantly increased the nodule and total plant dry weight at 45 days of sowing. Grain yield was significantly increased by the application of molybdenum throughammonium molybdate @ 1 kg ha−1 which was 42.9; higher over the recommended dose of fertilizeralone. Combination of all micronutrients viz., Fe+B+Zn+Mo could increase the grain yield significantlyto the tune of 25.3; over RDF alone. Microbial population viz., Rhizobium, PSB and uptake of nutrients viz., N, P, K, S and Zn, Fe and B was also higher under the treatment of RDF+ ammonium molybdate @1 kg ha−1 and the values were 43 and 26 X103 per gram of soil and 58.84, 3.54, 41.37, 3.22 kg ha−1 and 48, 820 and 60 g/ha−1 respectively. Microbial inoculation could significantly increase the Rhizobium and PSB population and also the grain yield of chickpea (12.2;) over no inoculation.The study indicated the necessity of application of molybdenum wherever deficient in Vertisol under intensive (Soybean-Chickpea) cultivation of legumes as it is directly involved in biological nitrogenfixation through nitrogenase enzyme activity.
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