黄土高原旱地苹果园黑麦草不同生育期的重金属残留量分析

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关键词：旱地；黑麦草；重金属；苹果园生草

中图分类号：S543.6 文献标志码：A 文章编号：2097-2172（2025）06-0568-04

doi：10.3969/j.issn.2097-2172.2025.06.013

Analysis of Heavy Metal Residues in Lolium perenne at Different Growth Stages in Dryland Apple Orchards on the Loess Plateau

DENG Xiuxia， LUO Yanning，HUANG Maolin， CAO Siming， WU Feng， YANG Zhi （Qingyang City Grassland Workstation， Qingyang Gansu 745ooo， China）

Abstract：Inorder to efectivelytapthepotentialutilization valueofappleorchard gras，toensurethegreen useof orchard， takingLoliumperenneplantedintheorchardof NingCountyastheresearchobject，thecontentof heavymetalsinthegrowing period was measured.Theresultsindicatedthatamong the5heavymetals inperennialryegrassfromappleorchards inNing County， themonthlyconcentrationsoflead，arsenic，cadmium，andmercurywereallfarbelowthenationallimitstandards.However，the concentration of chromium exceeded the national threshold ⟨5mg/kg⟩ throughout the growing season，with the highest value of 31.15 mg/kgrecordedinJuly.Theresultssugestedthatchomiumelementshouldbethekeyobjectofmonitoringandcontrolingthesafe utilizationofforageinorchards，andperennialryegrass inorchardscouldnotbeusedasthemainforageforlivestock.

KeyWords：Dryland; Lolium perenne; Heavy metal; Apple orchard grass cultivation

庆阳市是甘肃省苹果的主产区之一，已被农业农村部列入全国优质苹果最优产地和最佳适生区，苹果产业目前已成为该地区农业发展的重要支柱产业[]。（剩余5689字）