Boron contents and isotopic compositions of hog manure, selected fertilizers, and water in Minnesota
Boron contents and isotopic compositions of hog manure, selected fertilizers, and water in Minnesota
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DOI：
10.2134/jeq1997.00472425002600050004x
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发表时间：
1997-09
影响因子：
2.4
通讯作者：
S. Komor
中科院分区：
文献类型：
--
作者：
S. Komor
在农业环境中，硼同位素(δ11 B)值可用作污染物的替代示踪剂和水混合的指示剂。本文描述了猪粪和所选肥料的硼含量和同位素组成，并给出了两个农业区地下水和地表水的δ11B数据。干猪粪中的硼含量平均为61毫克/公斤，商业化肥中的硼含量从某些品牌的硝酸铵和尿素的检测下限到硫酸镁中的382毫克/公斤不等。未处理猪粪的δ11B为7 2~11 2‰，氮肥为-2 0~0 7‰。在明尼苏达州中东部一个砂质平原含水层的22个地下水样品中，B的平均浓度为0.04 mg/L，δ11B值在2.3~41.5‰之间。在一个养猪场和一块施有猪粪的耕地下面的地下水，其B同位素组成与含有猪粪渗滤液的水一致。在明尼苏达州中南部一个775平方公里的粉壤土流域：18个玉米(Zea Mays L.)和大豆(Glyine max L.Merr.)野外水样的平均B浓度为0.06 mg/L，δ11 B值为5.3~15.1‰；27个水样的平均B浓度为0.05 mg/L，δ11 B值为1.0~19.0‰；8个地下水样品的平均B浓度为0.09 mg/L，δ11 B值为-0.3~23.0‰。δ11 B和B浓度的值相互对比时，定义了一种曲线混合趋势，表明地下排水和溪水中含有来自浅层和深层地下水的B的混合物。
Boron-isotope (δ 11 B) values may be useful as surrogate tracers of contaminants and indicators of water mixing in agricultural settings. This paper characterizes the B contents and isotopic compositions of hog manure and selected fertilizers, and presents δ 11 B data for ground and surface water from two agricultural areas. Boron concentrations in dry hog manure averaged 61 mg/kg and in commercial fertilizers ranged from below detection limits in some brands of ammonium nitrate and urea to 382 mg/kg in magnesium sulfate. Values of δ 11 B of untreated hog manure ranged from 7.2 to 11.2‰ and of N fertilizers were -2.0 to 0.7‰. In 22 groundwater samples from a sand-plain aquifer in east-central Minnesota, B concentrations averaged 0.04 mg/L and δ 11 B values ranged from 2.3 to 41.5‰. Groundwater beneath a hog feedlot and a cultivated field where hog manure was applied had B-isotope compositions consistent with the water containing hog-manure leachate. In a 775-km 2 watershed with silty-loam soils in south-central Minnesota: 18 samples of subsurface drainage from corn (Zea mays L.) and soybean (Glycine max L. Merr.) fields had average B concentrations of 0.06 mg/L and δ 11 B values of 5.3 to 15.1‰; 27 stream samples had average B concentrations of 0.05 mg/L and δ 11 B values of 1.0 to 19.0‰; and eight groundwater samples had average B concentrations of 0.09 mg/L and δ 11 B values of -0.3 to 23.0‰. Values of δ 11 B and B concentrations, when plotted against one another, define a curved mixing trend that suggests subsurface drainage and stream water contain mixtures of B from shallow and deep groundwater.