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2 State Key Laboratory of Arid Habitat Crop Science, Lanzhou, Gansu Province 730070, China;
3 College of Pratacultural Science, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
4 College of Forestry, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309575112588878346, articleId=1309575110885990921, tenantId=1146029695717560320, journalId=1308397196074385509, language=CN, title=氮磷添加缓解了紫花苜蓿土壤微生物养分限制, columnId=1309565024058835950, journalTitle=草地学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=本研究以黄土丘陵区紫花苜蓿地为研究对象，设置不施肥（CK）、单施氮肥（T1）、单施磷肥（T2）和氮磷肥配施（T3）4个处理，通过分析氮磷添加下紫花苜蓿土壤-微生物-胞外酶生态化学计量特征，探讨土壤养分限制特征及微生物对代谢限制的反馈机制。结果表明，施肥降低了土壤碳磷比、微生物量碳磷比（MBC∶MBP）、微生物量氮磷比（MBN∶MBP）和酶化学计量碳氮比（EEAC∶N），但增加了土壤养分含量、微生物量、胞外酶活性和酶化学计量氮磷比（EEAN∶P）。酶向量模型和矢量分析结果表明，长期种植苜蓿土壤微生物受到不同程度的碳限制和磷限制，氮磷添加缓解了土壤微生物磷限制，提高了微生物碳利用效率（CUE）。综上，黄土丘陵区长期种植苜蓿土壤应适当补施氮磷肥，以缓解土壤微生物的养分限制。, authors=祝文知¹, 罗珠珠^1,2, 李亮亮³, 何仁元⁴, 刘家鹤¹, authorsList=祝文知, 罗珠珠, 李亮亮, 何仁元, 刘家鹤, authorCompany=1 甘肃农业大学资源与环境学院, 甘肃 兰州 730070;
2 省部共建干旱生境作物学国家重点实验室, 甘肃 兰州 730070;
3 甘肃农业大学草业学院, 甘肃 兰州 730070;
4 甘肃农业大学林学院, 甘肃 兰州 730070, correspAuthors=null, authorNote=祝文知(2000-),女,汉族,甘肃金昌人,硕士研究生,主要从事土壤生态方面的研究,E-mail:2403924052@qq.com, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=sv/hhVFbTYSZoXVjS0W3MA==, pdfFileSize=2610530, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=国家自然科学基金项目 (32560778,31860364); 甘肃省优秀研究生“创新之星”项目 (2025CXZX-814))}, authors=[Author(id=1320572888667766807, tenantId=1146029695717560320, journalId=null, articleId=1309575110885990921, orderNo=null, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=null, email=null, emailSecond=null, emailThird=null, correspondingAuthor=null, authorType=null, ext={EN=AuthorExt(id=null, 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