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Assessing economic optimal nitrogen requirement of cotton crop using empirical modeling technique.

Authors :
Ullah, Asmat
Iqbal, Saba
Ali, Nauman
Hussain, Fiaz
Malik, Ayesha
Musa, Muhammad
Bhatti, Muhammad Ashraf
Abdullah, Muhammad
Shah, Syed Tansir Hussain
Source :
Journal of Plant Nutrition; 2023, Vol. 46 Issue 15, p3759-3770, 12p
Publication Year :
2023

Abstract

Nitrogen (N) is crucial for plant growth and yield, however excessive N in cotton hampers productivity by excessive vegetative growth, delaying phenological activity, decreasing yield and increase in cost of production. Therefore, it's necessary to find real values of input like N in current fertilizer availability crises. Hence, this experiment was designed to determine the economical optimum dose of N in cotton through empirical modeling during summer season of 2019 and 2020. Experimental treatments were comprised of; 0, 75, 100, 125, 150, 175 and 200 kg N ha<superscript>−1</superscript>. Results revealed that higher seed cotton yield (1222 and 1454 kg ha<superscript>−1</superscript>) was recorded when 200 Kg N ha<superscript>−1</superscript> was applied that was statistically at par with 150 kg N ha<superscript>−1</superscript> (1041 and 1272 in 2019 and 2020 respectively) and 175 kg N ha<superscript>−1</superscript> (1222 and 1386 kg ha<superscript>−1</superscript> in 2019 and 2020 respectively) was applied. A quadratic relationship was also developed by generating a model to regress the value of ratio of cotton yield and benefit cost ratio (BCR) per unit increase of N even beyond 200 kg N ha<superscript>−1</superscript>. Increasing the level from 0 to 200 N kg ha<superscript>−1</superscript> resulted in higher seed cotton yield and BCR (1.54:1 (2019) and 1.35:1 (2020), the curve showed that further increased in N resulted in decrease seed cotton yield and contributed to loss in N. In conclusion, the optimal N level for cotton was found 150 kg N ha<superscript>−1</superscript>, however, the economic optimum return could be achieved at 200 kg N ha<superscript>−1</superscript>. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01904167
Volume :
46
Issue :
15
Database :
Complementary Index
Journal :
Journal of Plant Nutrition
Publication Type :
Academic Journal
Accession number :
166103900
Full Text :
https://doi.org/10.1080/01904167.2023.2211610