中国草地学报2025，Vol.47Issue(3)：10-19,10.DOI:10.16742/j.zgcdxb.20240185
磷添加对科尔沁沙地紫花苜蓿生物量及化学计量特征的影响
Effects of Phosphorus Addition on Alfalfa Biomass and the Carbon,Nitrogen,and Phosphorus Stoichiometric Characteristics of Different Organs in Horqin Sandy Land
摘要
Abstract
This study investigated the effects of phosphorus application depth and level on alfalfa bio-mass and the stoichiometric characteristics of carbon(C),nitrogen(N),and phosphorus(P)in different alfalfa organs within the Horqin Sandy Land.By measuring alfalfa biomass and the C,N,and P content in each organ under varying phosphorus application regimes,this research aimed to provide a theoretical basis for optimizing alfalfa yields in this region.The results showed that alfalfa aboveground biomass reached its maximum under the S15P320 treatment,with a peak value of 537.00 g/m2.The highest C content was observed in stems,leaves,and roots under the S5P240,S10P320,and S10P160 treatments,respectively.The highest N content was recorded under the S5P160,S20P160,and S10P320 treatments,while P con-tent peaked under the S5P240,S10P320,and S10P320 treatments.Correlation analysis revealed a signifi-cant negative correlation between N content and the C∶N ratio,and a significant positive correlation between N content and the N∶P ratio in stems,a significant negative correlation between P content and the stem C∶P ratio,a significant positive correlation between leaf N content and the leaf N∶P ratio,and a sig-nificant negative correlation between leaf N content and the leaf C∶N ratio,and a significant negative corre-lation between leaf P content and the leaf C∶P and N∶P ratios.Membership function analysis indicated that P addition in the S10P320 treatment had a significant positive effect on both total biomass and nutrient uptake in alfalfa.关键词
磷添加/紫花苜蓿/生物量/化学计量Key words
Phosphorus addition/Alfalfa/Biomass/Chemical stoichiometry分类
农业科技引用本文复制引用
刘晓阳,赵力兴,朱铁霞,王志鹏,梁晓宇,高凯..磷添加对科尔沁沙地紫花苜蓿生物量及化学计量特征的影响[J].中国草地学报,2025,47(3):10-19,10.基金项目
国家自然科学基金项目(32260343) （32260343）
内蒙古自治区自然科学基金项目(2021MS03085) （2021MS03085）
内蒙古自治区直属高校基本科研业务费项目(GXKY22052) （GXKY22052）
