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Nitrogen fertility and abiotic stresses management in cotton crop: a review
Authors:Aziz Khan  Daniel Kean Yuen Tan  Muhammad Zahir Afridi  Honghai Luo  Shahbaz Atta Tung  Mir Ajab  Shah Fahad
Affiliation:1.The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group,Shihezi University,Shihezi,China;2.Key Laboratory of Plant Genetic and Breeding, College of Agriculture,Guangxi University,Nanning,China;3.Faculty of Science, Plant Breeding Institute, Sydney Institute of Agriculture, School of Life and Environmental Sciences,The University of Sydney,Sydney,Australia;4.Department of Agronomy, Amir Muhammad Khan Campus Mardan,The University of Agriculture,Peshawar,Pakistan;5.College of Plant Science and Technology,Huazhong Agricultural University,Wuhan,China;6.Quaid-i-Azam University Islamabad,Islamabad,Pakistan
Abstract:This review outlines nitrogen (N) responses in crop production and potential management decisions to ameliorate abiotic stresses for better crop production. N is a primary constituent of the nucleotides and proteins that are essential for life. Production and application of N fertilizers consume huge amounts of energy, and excess is detrimental to the environment. Therefore, increasing plant N use efficiency (NUE) is important for the development of sustainable agriculture. NUE has a key role in crop yield and can be enhanced by controlling loss of fertilizers by application of humic acid and natural polymers (hydrogels), having high water-holding capacity which can improve plant performance under field conditions. Abiotic stresses such as waterlogging, drought, heat, and salinity are the major limitations for successful crop production. Therefore, integrated management approaches such as addition of aminoethoxyvinylglycine (AVG), the film antitranspirant (di-1-p-menthene and pinolene) nutrients, hydrogels, and phytohormones may provide novel approaches to improve plant tolerance against abiotic stress-induced damage. Moreover, for plant breeders and molecular biologists, it is a challenge to develop cotton cultivars that can tolerate plant abiotic stresses while having high potential NUE for the future.
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