Vol. 8, Issue 4 (2020)
Physiological & biochemical response of maize (Zea mays L.) to low grade rock phosphate under acidic soils of Odisha
Author(s): Soumya Mishra and Monalisa SP
Abstract: A field experiment entitled was conducted at central farm OUAT, Bhubaneswar under Department of Soil Science & Agricultural Chemistry during Kharif 2017. The physiological studies were carried out in the Department of Plant Physiology, College of Agriculture, Bhubaneswar. The result revealed that plant height, number of leaves and dry matter were improved by the level of P application. Among the treatments application of 100% P(SSP)+0.2% LR registered significant increase in of the above growth character in maize crop which reflect a higher value of LAI, CGR, RGR and lower value of NAR. Chlorophyll content was found to be maximum in T7 (100% SSP + 0.2% LR) followed by T5 (50% RP+50% SSP). The other nutritional components like carbohydrate, protein and sugar of grains increased significantly with increase in the level of P application. Higher concentration of nutrient elements (N, P, K and S) found maximum in 100% SSP + 0.2% LR in both grain and Stover. Among the different combination of RP and SSP, taller plant and highest no. of leaves were produced by application of 50% RP+50% SSP with higher dry matter accumulation. The biochemical traits like nutritional composition (carbohydrate, protein & sugar) found maximum with the application of 50% RP+50% SSP among the combined application. But in the combination of RP and SSP nutrient contents (N, P, K & S) found maximum with application of 25% RP+75% SSP in Stover and with the application of 50% RP+50% SSP found maximum in grain. The grain yield in maize increased significantly with increase in the level of P application due to increase in cob weight, no. of grain per plant, cob length, cob diameter, 100 seed weight and the highest yield registered among the treatments by the application of 100% SSP+0.2% LR. Among the combined application of 50% RP+50% SSP registered the highest yield over the sole application of either R or SSP. In view of the positive and beneficial effect of P application in maize crop it may be concluded that improvement in productive of maize crop by the use of low grade rock phosphate under acid soils can be possible through combined application of 50% RP + 50% SSP.
DOI: 10.22271/chemi.2020.v8.i4v.9925
Pages: 2030-2035 | 534 Views 73 Downloads
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How to cite this article:
Soumya Mishra, Monalisa SP. Physiological & biochemical response of maize (Zea mays L.) to low grade rock phosphate under acidic soils of Odisha. Int J Chem Stud 2020;8(4):2030-2035. DOI: 10.22271/chemi.2020.v8.i4v.9925
