長沙縣典型稻區(qū)灌溉溝渠水體重金屬污染狀況及風(fēng)險特征

打開文本圖片集

中圖分類號：X824 文獻標識碼：A 文章編號：1006-060X（2025）03-0047-05

引用格式：，.長沙縣典型稻區(qū)灌溉溝渠水體重金屬污染狀況及風(fēng)險特征[J].湖南農(nóng)業(yè)科學(xué)，2025（3）：47-51.DOI：10.16498/j.cnki.hnnykx.2025.003.009

TheHeavy Metal Pollution Status and Risk Characteristics of Water Bodies of Irrigation Ditches in Typical Rice Areas of Changsha County

ZHOU Jie1， ZHOU Jing-ming2

（1.HunanEastongtingLkeNtioalatureReserveAdministratio，Yueyang44o，C;2.YueyangAademyofAlual Sciences，Yueyang 41400o，PRC）

Abstract：TakingwaterbodiesofirigationditchesintypicalriceareasofChangsha CountyinHunan Provinceastheresearch object，haracteristicsofavmetalotentinaterodiesofiigationdihesuringnoalaterprod，lowaterodnd highwaterperderemooedndissssmntasaedut，ostrovidebsisforioallandgawater and water body environment risk management.The results showed that the contents of Cd，Pb，As， H g and in the water bodies of irrigationditchesof8townsinChangsha Countydidnotexcedthelimit valueofthefarmlandigation waterqualitystandard（GB 5084—2021），and all showed thecharacteristicsofhighwaterperiod > normal water period ≈ lowwater period.The single factor polutionindex andomprehensivepoutionidexof5kindsofeavymetalsinwaterbodiesof irgationditches inthesudyarea duringnormal waterperiod，lowwaterperiodandhighwaterperiodshowedthatheywereclean，andthepollutionrisksofAsand Cd wereelativelyhigh.Hence，elevantsuggestionswereputforward：thedisturbancetothesedimentofigationditcesshouldbe minimizedinagriculturalproductionirigation，andthefoodafterheavyrainshouldbe preventedfromenteringfarmlandasmuchas possible， so as to reduce the risk of heavy metal pollution in irrigation water.

Key words：irrigation water;heavy metal; pollution risk; rice; Changsha County

重金屬作為一種持久性污染物，具有難降解、易積累、毒性大等特性，主要通過灌溉水、大氣干濕沉降、農(nóng)業(yè)投入等途徑進入農(nóng)田。（剩余7025字）