摘要
本文聚焦以重金属Cd污染耕地,应用优化施肥、品种替换、水分调控等技术措施开展水稻田间种植试验,探究轻中度污染耕地安全利用技术,强化耕地土壤分类管理的手段。结果表明:种植Cd低积累性水稻品种的条件下,使用优化施肥及水分调控措施对降低耕作层土壤Cd含量效果最好;施用生物炭基有机肥和叶面肥能有效降低水稻籽粒中的重金属Cd含量;水分调控对抑制重金属Cd从茎秆向籽粒转运具有较好效果。综合考量,选择优化施肥+品种替换+水分调控的技术组合效果最佳。但各项措施会导致管理成本增加,故安全利用技术的应用推广还需结合农户实际生产情况和需求来开展。
Focusing on farmland polluted by cadmium,this paper conducted rice field planting experiment by applying technical measures such as optimal fertilization,variety replacement and water regulation to explore safe utilization technology of lightly and moderately polluted farmland,and to strengthen the means of classified management of farmland soil.The results showed that under the condition of planting rice variety with low accumulation for cadmium,optimal fertilization and water regulation had the best effect on reducing cadmium in soil of cultivated layer.The application of biochar-based organic fertilizer and foliar fertilizer could effectively reduce the content of cadmium in rice grain;water regulation had a good effect on inhibiting the transfer of cadmium from stem to grain.Comprehensive considered,the technical combination of optimal fertilization+variety replacement+water regulation had the best effect.However,the various measures may increase the management costs,so the application and promotion of safe utilization technology should be carried out according to the actual production situation and demand of farmers.
作者
陈宇佳
陆萍
张蓉
朱琰
张逸鸣
蒋杭峰
CHEN Yujia;LU Ping;ZHANG Rong;ZHU Yan;ZHANG Yiming;JIANG Hangfeng(Jiading District Agricultural Technology Extension and Service Center in Shanghai City,Shanghai 201800;Jiading District Juyuan New District Agricultural and Rural Service Center in Shanghai City,Shanghai 201800)
出处
《现代农业科技》
2023年第19期153-156,共4页
Modern Agricultural Science and Technology
基金
嘉定区自然科学研究课题“嘉定区受污染耕地水稻土壤安全利用技术研究与示范”(JDKW-2021-0004)。
关键词
安全利用技术
污染耕地
重金属镉
有机肥
水分调控
品种替换
上海市
嘉定区
safe utilization technology
polluted farmland
heavy metal cadmium
organic fertilizer
water regulation
variety replacement
Shanghai City
Jiading District
