水肥对珍珠猪毛菜非结构性碳和生态化学计量比特征的影响  

Effects of water and fertilizer on non-structural carbon and ecological stoichiometric ratio characteristics of Salsola passerina

作　　者：张志明 孙小妹[2,3] 张彩军 包段红 王志成 苏军虎[1,2] ZHANG Zhi-ming;SUN Xiao-mei;ZHANG Cai-jun;BAO Duan-hong;WANG Zhi-cheng;SU Jun-hu(College of Pratacultural Science,Gansu Agricultural University,Key Laboratory of Pratacultural Ecosystem of Ministry of Education,Pratacultural Engineering Laboratory of Gansu Province,Sino-US Research Center for Grassland And Animal Husbandry Sustainable Development,Lanzhou 730070,China;Grassland Biodiversity Research Centre,Massey University,Lanzhou 730070,China;College of Resources and Environment,Gansu Agricultural University,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学草业学院,草业生态系统教育部重点实验室,甘肃省草业工程实验室,中‐美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]甘肃农业大学,新西兰梅西大学草地生物多样性研究中心,甘肃兰州730070 [3]甘肃农业大学资源与环境学院,甘肃兰州730070

出　　处：《草原与草坪》2024年第6期154-162,共9页Grassland and Turf

基　　金：武威市科技计划项目(WW2002YFS008)。

摘　　要：【目的】明晰水肥对高寒荒漠区优势种珍珠猪毛菜(Salsola passerina)生长的影响。【方法】本研究选取高寒荒漠区珍珠猪毛菜典型群落,设置复合肥添加(F)、水与复合肥添加(W+F)处理和对照(CK),分析珍珠猪毛菜根、茎、叶非结构性碳与碳:氮:磷计量特征的变化。【结果】珍珠猪毛菜群落的植被盖度在W+F下相对于F和CK增加了52.7%和432.9%,单株总生物量在F下相对于CK和W+F增加了44.5%和69.7%;淀粉、氮和磷在受水肥添加后差异显著(P<0.05),可溶性糖、非结构性碳和全C在各器官间受水肥添加差异不显著,且各器官间氮磷比小于14;非结构性碳与碳:氮:磷计量比关系表明根和茎内可溶性糖、茎和叶内淀粉与植物全氮呈负相关,茎内可溶性糖和叶内可溶性糖、淀粉与植物全磷呈正相关。【结论】高寒荒漠区珍珠猪毛菜并不是在W+F下越有利于干物质积累,该地区植物体生长主要受氮的限制,且珍珠猪毛菜可通过氮和磷含量的变化调整非结构性碳的构成和分配从而适应干旱生境。【Objective】Water and fertilizer are criticalfactors restricting the growth of plants in the alpine desert ecosystem in the northern foothills of the Qilian Mountains.This study aimed to investigate the effect of water and fertilizer on the growth of Salsola passerina,the dominant species in the alpine desert area.【Method】In this study,typical communities of Salsola passerina were selected in the alpine desert area,with three treatments applied:compound fertilizer addition(F),water and compound fertilizer addition(W+F)treatment,and control(CK).Changes of non-structural carbon of roots,stems and leaves of Salsola passerina and the measurement characteristics of ratio of carbon:nitrogen:phosphorus were analyzed.【Result】The results showed that the vegetation cover of the Salsola pas⁃serina community increased by 52.7%and 432.9%under W+F compared to F and CK,respectively.The total biomass per plant increased by 44.5%and 69.7%under F compared to CK and W+F,respectively.There were significant differences in the addition of starch,nitrogen and phosphorus(P<0.05),while soluble sugar,non-structural carbon,and whole C were not significantly different in the addition of water and fertilizer.The nitrogen:phosphorus ratio was consistently<14 between organs.The relationship between non-structural carbon and carbon:nitrogen:phosphorus measurement ratio showed that soluble sugars in roots and stems,starch in stems and leaves were negatively correlated with total plant nitrogen,while soluble sugars in stems,leaves,and starch were positively correlated with total phosphorus in plants.【Conclusion】The growth of Salsola passerina in alpine desert areas is not significantly enhanced by W+F nitrogen limitation.Salsola passerina is adapted to arid habitats by adjusting the composition and allocation of non-structural carbon through changes in nitrogen and phosphorus content.

关 键 词：珍珠猪毛菜 高寒荒漠草地 非结构性碳水化合物 生态化学计量比 

分 类 号：S812[农业科学—草业科学]