不同生育期施用氮肥对板栗园土壤重金属的影响  

Effects of Nitrogen Fertilizer Application at Different Growth Stages on Heavy Metals in Chestnut Orchard Soil

作　　者：刘颂驰 潘顺详 张海娥 陈丽娜[1,2] LIU Songchi;PAN Shunxiang;ZHANG Haie;CHEN Lina(Hebei Normal University of Science&Technology,Qinhuangdao 066000,China;Hebei Key Laboratory of Crop Stress Biology,Qinhuangdao 066000,China;Engineering Research Center of Chestnut Industry Technology,Ministry of Education,Qinhuangdao 066000,China;Hebei Collaborative Innovation Center of Chestnut Industry,Qinhuangdao 066000,China)

机构地区：[1]河北科技师范学院,河北秦皇岛066000 [2]河北省作物逆境生物学重点实验室,河北秦皇岛066000 [3]板栗产业技术教育部工程研究中心,河北秦皇岛066000 [4]河北省板栗产业协同创新中心,河北秦皇岛066000

出　　处：《中国果菜》2024年第9期47-52,共6页China Fruit & Vegetable

基　　金：国家重点研发计划项目-主要经济林优质高产新品种创制与精准栽培技术(2022YFD2200400)。

摘　　要：为了探究氮肥在板栗不同关键生育期施用对土壤中重金属含量的影响,在板栗萌芽期、开花期、果实膨大期和果实采收期分别施用不同水平的氮肥,测定土壤中Cr、As、Cd、Pb的含量。结果表明,在板栗开花期、果实膨大期、采收期土壤中As、Cd、Pb含量总体呈上升的趋势;土壤中Cr元素含量在板栗关键生育期施肥三次和施肥四次处理中总体呈下降趋势。通过对土壤重金属污染的评价,得出N9处理(萌芽期、开花期、果实膨大期与采收期按照10∶20∶20∶50的比例施用氮肥)不会导致土壤重金属As、Cd、Pb和Cr的污染;其余处理会导致上述重金属的轻微污染。综上所述,从降低土壤重金属污染方面考虑,推荐在萌芽期、开花期、果实膨大期与采收期按照10∶20∶20∶50的比例施用氮肥。To investigate the impact of nitrogen fertilizer allocation at key growth stages of chestnut trees on soil heavy metal content,varying levels of nitrogen fertilizer were administered during bud sprouting,flowering,fruit expansion,and fruit harvesting periods,with subsequent measurement of Cr,As,Cd,and Pb concentrations in the soil.The results showed that the contents of As,Cd and Pb in the soil at flowering stage,fruit expansion stage and harvesting stage showed an increasing trend,and the content of Cr in soil showed a decreasing trend during three and four fertilization treatments in the key growth stage of chestnut.After evaluating heavy metal pollution in soil,it was determined that the application of nitrogen fertilizer at a ratio of 10∶20∶20∶50 during the germination,flowering,fruit expansion,and harvest periods(N9 treatment)could not result in soil contamination by heavy metals such as As,Cd,Pb,and Cr.However,other treatments might lead to slight pollution by these heavy metals.Therefore,for the purpose of reducing soil heavy metal pollution,it was recommended to apply nitrogen fertilizer at a ratio of 10∶20∶20∶50 during the germination,flowering,fruit expansion and harvest periods.

关 键 词：板栗 生育期 氮肥分配 土壤重金属 

分 类 号：S641[农业科学—蔬菜学]