紫花首蓿对土壤速效养分的影响及其地理气候调控机制

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关键词紫花苜蓿；土壤速效养分；平均效应值;纬度;蒸散量

中图分类号 5541+ .1文献标识码A

文章编号 0517-6611（2025）14-0217-04

doi： 10.3969/j.issn.0517-6611.2025.14.043

开放科学（资源服务）标识码（OSID）：

Effects f Alfalfa Cultivation on Soil Available Nutrients and the Regulatory Role of Geographic and Climatic Factors LI Xue，PEI Wei-wei（Agriculture and Rural Affairs Bureau of Qilihe District，Lanzhou，Gansu 730050）

AbstractUnderstandingtheimpactofalfalfacultivationonsoilnutrientdyamicsnditsgulatorymechansmsisrucialfordacing high-qualityfrageproductiondiprovigsoilrtiltinCina’sgiculualyts.TistudutliMta-analsandofo estmodeligtoiallvaetffiooeatioofbgosu um，aswlleparioetalctosgovngteang.dsvalatffiatiointlysl trient levels，with increases of 37.7% 33.6% ，and 23.3% in available nitrogen，phosphorus ，and potassium，respectively.Significant regional variationwasnoted，iththeTibetutonomousRegiondemostratingthehighstutrientagmentation，hileHebeiandGansuproincdis playedcomparativelylowericressandomforestalysisfurthrdentifdggapicactorssparticularlympactful，withltided longitude emerging as the principal factors influencing available nitrogen and phosphorus，contributing 39.5% and 44.1% of their respective variances.Incontrast，latitdeandevapotranspirationwerefoundtoexertthegeatestinfluenceonavilablepotassium，accoutingfor 32.9% and （20 22.5% ofthetotalvaraceesetielstematiallyquantingtelatieiporancefgeogapicndcaticfctrs，tsdyp videsarobustsificoudatiofotiingfalfiatiodiltrntangetpracticslstacesoill agricultural productivity.

KeyWordsAlfalfa;Soil availablenutrients;Average effect size;Latitude;Evapotranspiratiol

随着我国对奶牛养殖业的重视，作为高质量饲料的紫花苜蓿需求逐渐增加，种植面积和产量均呈现增长趋势[1]。（剩余8798字）