Exogenous application of bio-stimulants and growth retardants improve nutrient absorption and fiber quality in upland cotton  

作　　者：Al-Khayri Jameel M. Arif Muhammad Kareem Shadia Hama Salih Anwar Adeel Dehghanisanij Hossein Emami Somayeh Yasmeen Azra Aftab Komal Negm Mohamed 

机构地区：[1]Department of Agricultural Biotechnology,College of Agriculture and Food Sciences,King Faisal University,31982 Al‑Ahsa,Saudi Arabia [2]Water Resources Zone,Irrigation Department Punjab,D.G.Khan,Pakistan [3]Department of Biotechnology and Crop Science,College of Agricultural Engineering Sciences,University of Sulaimani,Sulaimani,Iraq [4]Department of Agronomy,PMAS-Arid Agriculture University,Rawalpindi,Pakistan [5]Agricultural Research,Education and Extension Organization,Agricultural Engineering Research Institute,Karaj,Alborz,Iran [6]Department of Water Engineering,University of Tabriz,Tabriz,Iran [7]Department of Agronomy,Bahauddin Zakariya University,Multan,Pakistan [8]Department of Plant Breeding and Genetics,Bahauddin Zakariya University,Multan,Pakistan [9]Agricultural Research Center,Cotton Research Institute,Giza 12619,Egypt

出　　处：《Journal of Cotton Research》2024年第2期137-147,共11页棉花研究（英文）

摘　　要：Background Natural and synthetic plant growth regulators are essential for plant health,likewise these regulators also play a role in increasing organic production productivity and improving quality and yield stability.In the present study,we have evaluated the effects of foliar applied plant growth regulators,i.e.,moringa leaf extract(MLE)and mepiquat chloride(MC)alone and in combination MC and MLE on the conventional cotton cultivar(CIM 573)and transgenic one(CIM 598).The growth regulators were applied at the start of bloom,45 and 90 days after blooming.Results The application of MC and MLE at 90 days after blooming significantly improved the relative growth rate,net assimilation rate,the number of bolls per plant,and seed cotton yield.Likewise,the combined application of MLE and MC at 90 days after blooming significantly boosted the nitrogen uptake in locules,as well as the phosphorus and potassium uptake in the leaves of both cotton cultivars.The application of MLE alone has considerably improved the nitrogen uptake in leaves,and phosphorus and potassium contents in locules of Bt and conventional cotton cultivars.Similarly,Bt cotton treated with MLE at 90 days after blooming produced significantly higher ginning out turn and oil contents.Treatment in combination(MLE+MC)at 90 days after blooming produced considerably higher micronaire value,fiber strength,and staple length in conventional cultivar.Conclusion The natural growth enhancer,MLE is a rich source of minerals and zeatin,improving the nutrient absorption and quality of cotton fiber in both conventional and Bt cotton cultivars.

关 键 词：Bio-stimulant COTTON Fiber quality Mepiquat chloride Moringa leaf extract Potassium accumulation Oil contents 

分 类 号：S562[农业科学—作物学]