福建农业学报2025，Vol.40Issue(5)：510-517,8.DOI:10.19303/j.issn.1008-0384.2025.05.009
氮磷钾肥用量对2种决明不同器官氮积累的影响
Effects of NPK Fertilizations on N-accumulation in Organs of Chamaecrista Spp
摘要
Abstract
[Objects]Effects of NPK fertilizations on N-accumulation in organs of two Chamaecrista spp.were compared.[Method]Five levels of N,P,and K fertilizer were applied in soil to determine the N contents in the stems,leaves,roots,and pods as well as the above-and under-ground parts of the Chamaecrista plants grown on the treatment soil to analyze their correlations.[Results]The N contents in the organs of the plants under varied fertilization treatments ranked pods or leaves＞roots＞stems or aboveground parts＞underground parts.Appropriate amount of fertilizer significantly improved the N-accumulation in the organs as well as above-and under-ground parts.The greatest N-accumulation in the above-and underground parts of the two Chamaecrista spp.occurred when either 36 kg·hm-2 N or 96 kg·hm-2 P was applied,while that in the aboveground parts of C.rotundifolia by 60 kg·hm-2 K application and of C.nictitans by 120 kg·hm-2 K.[Conclusion]Different fertilizations exerted a less significant effect than the plant species did on the N-accumulation of Chamaecrista spp.The Chamaecrista SPP treated with 36 kg·hm-2 of nitogen and 96 kg·hm-2 of phosphorus showed the highest nitrogen accumulation,while those receiving potassium in the range of 60 kg·hm-2 to 120 kg·hm-2 also exhibited maximum nitrogen accumulation.The N-accumulation positively correlated with the biomass and N contents in the stems and leaves,but negatively with the N content in the roots.关键词
不同器官氮含量/氮积累量/氮、磷、钾肥/决明属植物/施肥水平Key words
N contents in organs/N-accumulation/N,P,K fertilizer/Chamaecrista SPP/fertilization level分类
农业科技引用本文复制引用
钟珍梅,杨庆,李春燕,翁伯琦..氮磷钾肥用量对2种决明不同器官氮积累的影响[J].福建农业学报,2025,40(5):510-517,8.基金项目
福建省农业高质量发展超越"5511"协同创新工程项目(XTCXGC2021019) （XTCXGC2021019）
