Sources of Nitrogen in Combination with Systems of Irrigation Influence the Productivity of Modern Rice(Oryza sativa L.)Cultivars during Dry Season in Sub-Tropical Environment  

作　　者：Uttam Kumer Sarker Md.Romij Uddin Ahmed Khairul Hasan Md.Abdur Rahman Sarkar Md.Abdus Salam Md.Alamgir Hossain Eldessoky S.Dessoky Ismail A.Ismail 

机构地区：[1]Department of Agronomy,Bangladesh Agricultural University,Mymensingh,2202,Bangladesh [2]Department of Crop Botany,Bangladesh Agricultural University,Mymensingh,2202,Bangladesh [3]Department of Biology,College of Science,Taif University,Taif,21944,Saudi Arabia

出　　处：《Phyton-International Journal of Experimental Botany》2022年第8期1687-1708,共22页国际实验植物学杂志（英文）

基　　金：Bangladesh Agricultural Research Council(BARC),Bangladesh and the Taif University Researchers Supporting Project No.(TURSP-2020/85),Taif University,Taif,Saudi Arabia.

摘　　要：In irrigated agricultural systems,nitrogen(N)and water are the vital resources for sustainability of the crop production in the modern era of climate change.The current study aimed to assess the impact of water and N management on the productivity of irrigated rice cultivars.In the context,a field observation was done at the research farm of Bangladesh Agricultural University,Mymensingh,during dry seasons in consecutive two years(2018–2019 and 2019–2020).The experiments were set up following split-plot design assigning water management in the main plots,nitrogen management in the sub-plots,and the cultivars were approved in the split-split plot with three replications.After two years observation,it was revealed that rice cultivar Binadhan-8 gave the maximum value of leaf area index,number effective tillers hill-1 and grains panicle-1 which lead to the higher grain yield(GY).Substantial relationships were observed among the concentration of N,growth,total dry matter(TDM)and N content,N uptake,N utilization effectiveness,and GY.However,with little exception,the Combined effect of water and N,cultivars and water management were varied significantly for all parameters.Finally,the results of the current study concluded that application of irrigation at 8 days after the disappearance of ponded water and source of 105 kg N ha-1 from PU+Poultry manure are the best management approach for the excellent performance of rice cultivar Binadhan-8.

关 键 词：Growth stage high yielding rice cultivar internal N use efficiency water productivity 

分 类 号：S511[农业科学—作物学]