International Journal of Agricultural Sciences

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Effect of Potassium Application on its Transformation and Use Efficiency under Soybean - Wheat Cropping System


Affiliations
1 Department of Agronomy, Institute of Agricultural Sciences, Bundelkhand University, Jhansi, U.P., India
2 Directorate of Soybean Research, Indore, M.P., India
3 Division of Agronomy, I.A.R.I., New Delhi, India
4 Department of Agronomy, Rajasthan College of Agriculture, Udaipur, Rajasthan, India
     

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A field experiment was conducted at Instructional Farm, Directorate of Soybean Research (DSR), Indore M.P. during 2006-07 and 2007-08 to study effect of potassium application on its transformation and use efficiency under soybean - wheat cropping system. Data revealed that normal sowing date of soybean and wheat recorded significantly higher seed and straw yield (2544 and 2481 and 4908 and 7284 kg ha-1, respectively).Total K uptake by soybean-wheat system and potassium harvest index also higher over late sowing date of both the crops. With respect to K levels, application of 49.80 kg K2O the recorded maximum yield of soybean and wheat, K uptake by soybean, wheat and system and potassium harvest index. The highest agronomic and physiological K use efficiency was associated with 33.2 kg K/ha. Maximum partial factor productivity, recovery efficiency and physiological K use efficiency was recorded with JS 335. Among soybean genotypes, JS 9305 showed its superiority in case of agronomic K use efficiency, internal K use efficiency and recorded higher yield, system, total K uptake and potassium harvest index over control.

Keywords

Potassium Level, Seed, Straw, Yield, Soybean, Wheat, Genotypes, Potassium Transformation, K Use Efficiency
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  • Effect of Potassium Application on its Transformation and Use Efficiency under Soybean - Wheat Cropping System

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Authors

B. P. Meena
Department of Agronomy, Institute of Agricultural Sciences, Bundelkhand University, Jhansi, U.P., India
S. D. Billore
Directorate of Soybean Research, Indore, M.P., India
A. K. Vyas
Division of Agronomy, I.A.R.I., New Delhi, India
H. K. Sumeriya
Department of Agronomy, Rajasthan College of Agriculture, Udaipur, Rajasthan, India
K. K. Meena
Department of Agronomy, Institute of Agricultural Sciences, Bundelkhand University, Jhansi, U.P., India

Abstract


A field experiment was conducted at Instructional Farm, Directorate of Soybean Research (DSR), Indore M.P. during 2006-07 and 2007-08 to study effect of potassium application on its transformation and use efficiency under soybean - wheat cropping system. Data revealed that normal sowing date of soybean and wheat recorded significantly higher seed and straw yield (2544 and 2481 and 4908 and 7284 kg ha-1, respectively).Total K uptake by soybean-wheat system and potassium harvest index also higher over late sowing date of both the crops. With respect to K levels, application of 49.80 kg K2O the recorded maximum yield of soybean and wheat, K uptake by soybean, wheat and system and potassium harvest index. The highest agronomic and physiological K use efficiency was associated with 33.2 kg K/ha. Maximum partial factor productivity, recovery efficiency and physiological K use efficiency was recorded with JS 335. Among soybean genotypes, JS 9305 showed its superiority in case of agronomic K use efficiency, internal K use efficiency and recorded higher yield, system, total K uptake and potassium harvest index over control.

Keywords


Potassium Level, Seed, Straw, Yield, Soybean, Wheat, Genotypes, Potassium Transformation, K Use Efficiency