Yield and Micro Nutrient Uptake of Rapeseed (Brassica campestris var. toria) under Graded Doses of Rock Phosphate and Single super Phosphate in Acidic Soils

Author: Sanjay-Swami

Download PDF

Abstract

In acidic soils, efficiency of applied phosphatic fertilizer is relatively poor due to P fixation. The availability of P also depends on the sources of applied P. The direct application of rock phosphate (RP) as a source of P may be helpful in acidic P fixing soils. It is a source of not only P, but also of many micro nutrients like iron, copper and zinc. Therefore, a pot culture experiment was carried out in winter season of 2016-17 to investigate the influence of graded doses of rock phosphate and single super phosphate in six graded doses i.e. 0, 30, 60, 90, 120 and 150 mg P kg-1 soil on yield and micro nutrient uptake of rapeseed cv. M-27 in Alfisol and Inceptisol of Meghalaya. The trial was laid out in completely randomized design with three replications. The maximum mean dry matter yield of rapeseed was recorded 16.1 g pot-1 with 120 mg P kg-1 of soil. The dry matter yield obtained with RP was of lower degree in comparison to SSP at all levels of P irrespective of different acidi

Keywords

Phosphorus, sources, rapeseed, acidic soils, yield and micro nutrient uptake.

Conclusion

The application of P at lower levels resulted in significant increase in dry matter yield of rapeseed under both the P sources in Alfisol and Inceptisol of Meghalaya. The dry matter yield produced with RP was of lower order as compared to SSP at each levels of applied P irrespective of soil. The concentration of micronutrients viz. Fe, Cu, Zn and Mn in rapeseed decreased with successive application of P from 0-150 mg kg-1 in both the acidic soils i.e. Alfisol and Inceptisol, irrespective of sources of applied P, whereas, uptake of these micro nutrients increased up to 90 mg P kg-1 soil and thereafter decreased up to the highest level of applied P. The uptake of micro nutrients by rapeseed was observed to be of lower order in Alfisol with RP source of applied P compared with SSP. Therefore, application of 90 mg of P kg-1 of soil with SSP may be advised to the farmers of Meghalaya for getting higher yield of mustard in Alfisol and Inceptisol.

References

-

How to cite this article

Sanjay-Swami (2021). Yield and Micro Nutrient Uptake of Rapeseed (Brassica campestris var. toria) under Graded Doses of Rock Phosphate and Single super Phosphate in Acidic Soils. Biological Forum – An International Journal, 13(3): 466-475.