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Growth, yield and fiber quality characteristics of Bt and non-Bt cotton cultivars in response to boron nutrition

Journal of Cotton Research 2023年第1期6卷 1-12页

作者： MEHRAN muhammad ASHRAF muhammad SHAHZAD Sher muhammad shakir muhammad siddique AZHAR muhammad Tehseen AHMAD Fiaz ALVI Alamgir Department of Soil Science Bahauddin Zakariya UniversityMultanPakistan Department of Soil and Environmental Sciences College of AgricultureUniversity of SargodhaSargodhaPakistan Pesticide Residue Laboratory Kala Sha KakuPakistan Department of Plant Breeding and Genetics University of AgricultureFaisalabadPakistan Physiological/Chemistry Section Central Cotton Research InstituteMultanPakistan Soil and Water Testing Laboratory JhelumPakistan School of Agricultural Science Zhengzhou UniversityZhengzhou450000China

Background Boron(B)deficiency is an important factor for poor seed cotton yield and fiber ***,it is often missing in the plant nutrition program,particularly in developing *** current study investigated B’s effect on growth,yield,and fiber quality of Bt(CIM-663)and non-Bt(Cyto-124)cotton *** experimental plan consisted of twelve treatments:Control(CK);B at 1 mg·kg^(−1) soil application(SB1);2 mg·kg^(−1) B(SB2);3 mg·kg^(−1) B(SB3);0.2%B foliar spray(FB1);0.4%B foliar spray(FB2);1 mg·kg^(−1) B+0.2%B foliar spray(SB1+FB1);1 mg·kg^(−1) B+0.4%B foliar spray(SB1+FB2);2 mg·kg^(−1) B+0.2%B foliar spray(SB2+FB1);2 mg·kg^(−1) B+0.4%B foliar spray(SB2+FB2);3 mg·kg^(−1) B+0.2%B foliar spray(SB3+FB1);3 mg·kg^(−1) B+0.4%B foliar spray(SB3+FB2).Each treat-ment has three replications,one pot having two plants per *** B nutrition at all levels and methods of application significantly(P≤0.05)affected the growth,physiological,yield,and fiber quality characteristics of both cotton ***,SB2 either alone or in combination with foliar spray showed superiority over others,particularly in the non-Bt cultivar which responded better to B ***-mum improvement in monopodial branches(345%),sympodial branches(143%),chlorophyll-a(177%),chlorophyll-b(194%),photosynthesis(169%),and ginning out turn(579%)in the non-Bt cultivar was found with SB2 compared with *** Bt cultivar,although no consistent trend was found but integrated use of SB3 with foliar spray performed relatively better for improving cotton growth compared with other *** quality characteristics in both cultivars were improved markedly but variably with different B *** B nutrition with SB2 either alone or in combination with foliar spray was found optimum for improving cotton’s growth and yield characteristics.

关键词： Boron Cotton Fiber length Fiber strength GOT Micronaire value Seed cotton yield

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