河北省饶阳县富锌、硒特色土地及其生态效应评价

Evaluation of the characteristic land resources with Zn, Se and their ecological effects in Raoyang county of Hebei province

锌和硒是人体必需的生命元素。本文以河北省饶阳县表层土壤和大众农作物小麦、玉米、葡萄、茄子及协同调查的根系土为研究对象,在对锌、硒、有机碳、pH等指标测试分析的基础上,开展了研究区以锌、硒为特色的土地资源及生态效应评价。结果表明:饶阳县城南部、同岳乡北部、留楚乡以及大尹村镇南部地区,分布有较大面积的富锌特色土地,锌元素主要来源于第四系沉积物。不同农作物对锌元素吸收能力大小顺序为小麦>玉米>茄子>葡萄,且农作物对锌的吸收能力与土壤中的有机碳呈负相关,与pH值呈正相关。在该地区所采36件小麦籽实样品中,有4件为富硒小麦,且小麦对硒的吸收能力与土壤中的pH值呈正相关,与有机碳含量呈负相关。研究结果对饶阳县开发利用特色土地资源,发展功能农业产业具有重要的参考价值。

Zinc and selenium are essential elements in life. Taking topsoil and crops with their soil-in-root as the study object, this paper analyses zinc, selenium, organic carbon, pH value and other elements, and evaluates the characteristic land resources and their ecological effects in Raoyang county of Hebei province. The results show there are a large area of soil rich in zinc, distrabuting in the south of Raoyang county town, north of Tongyue town, Liuchu town and the south of Dayincun town. And zinc in soils is mainly inherited from parent material of sediments. The absorbility of the zinc order was wheat > corn > eggplant > grapes, and the crops absorbility of zinc has a positive relationship with the pH value and a negatively relationship with the organic carbon in soil. While there are 4 wheats rich in selenium, and the absorbility of selenium has a positive relationship with pH value and a negatively relationship with the organic carbon in soil. This study has a important reference value for the utilization of characteristic land resources and development of functional agriculture industry in Raoyang county.