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

作　　者：刘晓阳 赵力兴 朱铁霞[1] 王志鹏 梁晓宇 高凯[1] LIU Xiaoyang;ZHAO Lixing;ZHU Tiexia;WANG Zhipeng;LIANG Xiaoyu;GAO Kai(College of Prataculture,Inner Mongolia Minzu University,Tongliao 028000,China;Agricultural and Animal Husbandry Science Institute of Xing'an League of Inner Mongolia,Xing'an League 137400,China)

机构地区：[1]内蒙古民族大学草业学院,内蒙古通辽028000 [2]内蒙古兴安盟农牧科学研究所,内蒙古兴安盟137400

出　　处：《中国草地学报》2025年第3期10-19,共10页Chinese Journal of Grassland

基　　金：国家自然科学基金项目(32260343);内蒙古自治区自然科学基金项目(2021MS03085);内蒙古自治区直属高校基本科研业务费项目(GXKY22052)。

摘　　要：通过对不同施磷深度和施磷水平条件下紫花苜蓿生物量及各器官碳(C)、氮(N)、磷(P)含量测定,探讨磷添加对科尔沁沙地紫花苜蓿生物量及其各个器官C、N、P化学计量特征的影响规律,为在科尔沁沙地实施高产栽培提供理论支撑。结果表明:紫花苜蓿的地上生物量在S15P320处理下达到最大,为537.00 g/m^(2);紫花苜蓿茎、叶、根碳含量分别在S5P240、S10P320、S10P160处理下最高,氮含量分别在S5P160、S20P160、S10P320处理下最高,磷含量分别在S5P240、S10P320、S10P320处理下最高;相关性分析表明,茎秆氮含量与碳氮比呈显著负相关,与氮磷比呈显著正相关,茎秆磷含量与碳磷比呈显著负相关,叶片氮含量与氮磷比呈显著正相关,与碳氮比呈显著负相关,叶片磷含量与碳磷比、氮磷比呈显著负相关。隶属函数分析表明,S10P320处理对紫花苜蓿总生物量和元素吸收具有显著的促进效果。This study investigated the effects of phosphorus application depth and level on alfalfa biomass 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/m^(2).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 content peaked under the S5P240,S10P320,and S10P320 treatments.Correlation analysis revealed a significant 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 significant negative correlation between leaf N content and the leaf C∶N ratio,and a significant negative correlation 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 

分 类 号：S541.9[农业科学—作物学]