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Article

Response of Boll Development to Macronutrients Application in Different Cotton Genotypes

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Joint International Laboratory of Agriculture and Agri-Product Safety, Yangzhou University, Yangzhou 225009, China
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Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
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Department of Environmental Science, University of Haripur, Haripur 21120, Pakistan
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Department of Agronomy, Faculty of Agriculture, University of Swabi, Swabi 23340, Pakistan
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Department of Agronomy, College of Agricultural studies, Sudan University of Science and Technology, Khartoum 13311, Sudan
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Department of Agronomy, Faculty of Agriculture, University of Khartoum, Khartoum 11115, Sudan
*
Authors to whom correspondence should be addressed.
Agronomy 2019, 9(6), 322; https://doi.org/10.3390/agronomy9060322
Received: 17 April 2019 / Revised: 14 June 2019 / Accepted: 16 June 2019 / Published: 19 June 2019
(This article belongs to the Special Issue Cotton Breeding, Genetics and Genomics)
Combined application of nitrogen (N), phosphorus (P), and potassium (K) is a valuable practice to improve the growth and physiological activities of cotton, especially during a boll setting. The main purpose of this research was to investigate the effects of the different combined ratios of nitrogen (N), phosphorus (P), and K (potassium) on morpho-physiological activities of Bacillus thuringiensis (Bt) cotton genotypes Siza 1 and Sikang 1 during the cotton boll development stage. A two-year (2016–2017) field experiment was performed in which the total amount of combined N, P, and K were applied at different levels, B1 = 150 N, 0 P2O5, and 0 K2O kg ha−1 (control), B2 = 150 N, 45 P2O5, and 90 K2O kg ha−1, B3 = 150 N, 90 P2O5, and 135 K2O kg ha−1, and B4 = 150 N, 135 P2O5, and 180 K2O kg ha−1. Results revealed that combined application of N, P, and K significantly increased boll length by 5.8% and 2.3%, fresh boll weight by 12.2% and 16.4%, dry lint weight by 15.2% and 1.7%, number of seeds boll−1 by 15.2% and 2.5% as well as dry boll shell weight by 11.0% and 4.9% as compared with the treatment without P and K (1:0:0) across two growing seasons. Furthermore, superoxide dismutase activity was improved by 2.3% and 15.6% and soluble protein by 5.1% and 14.1% as compared with the control, respectively. Our study indicated that combined application of N, P, and K at appropriate ratios enhanced morpho-physiological activities (boll length, boll width, boll weight, protein content, sugar content, and superoxide dismutase) of cotton during boll development and generally the ratio of 150:135:180 considerably performed best amongst all treatments during two growing seasons in this study. View Full-Text
Keywords: boll development; nutrients management; cotton genotypes; enzyme activity boll development; nutrients management; cotton genotypes; enzyme activity
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MDPI and ACS Style

Ahmad, I.; Zhou, G.; Zhu, G.; Ahmad, Z.; Song, X.; Jamal, Y.; Ibrahim, M.E.H.; Nimir, N.E.A. Response of Boll Development to Macronutrients Application in Different Cotton Genotypes. Agronomy 2019, 9, 322. https://doi.org/10.3390/agronomy9060322

AMA Style

Ahmad I, Zhou G, Zhu G, Ahmad Z, Song X, Jamal Y, Ibrahim MEH, Nimir NEA. Response of Boll Development to Macronutrients Application in Different Cotton Genotypes. Agronomy. 2019; 9(6):322. https://doi.org/10.3390/agronomy9060322

Chicago/Turabian Style

Ahmad, Irshad, Guisheng Zhou, Guanglong Zhu, Zahoor Ahmad, Xudong Song, Yousaf Jamal, Muhi E.H. Ibrahim, and Nimir E.A. Nimir 2019. "Response of Boll Development to Macronutrients Application in Different Cotton Genotypes" Agronomy 9, no. 6: 322. https://doi.org/10.3390/agronomy9060322

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