Dairy Open Lot and Lagoon-Irrigated Pasture Runoff Quantity and Quality
Dairy Open Lot and Lagoon-Irrigated Pasture Runoff Quantity and Quality
复制标题
乳制品露天场地和泻湖灌溉牧场径流的数量和质量
DOI：
10.13031/2013.34739
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
M. Overcash
中科院分区：
文献类型：
--
作者：
P. Westerman;M. Overcash
摘要：确定了一个奶牛露天场地和一个牧场定期接受奶牛泻湖污水灌溉的降雨径流的数量和质量。在30个月的时间里，降雨变成径流的百分比在空地是21%，在牧场是10%。与饲养密度较高的牛肉饲养场和奶牛场报告的数据相比，该地块径流的营养物质浓度较低。估计该地块的平均氮肥产量为每公顷地块234公斤/年。在大部分研究期间，每隔一周用约1厘米的泻湖污水灌溉牧场。来自11个事件的浓度数据表明，与其他牧场径流研究相比，径流N和P浓度相对较高，其中唯一的动物粪便输入来自放牧牛，但与其他地方报告的浓度相似，接受类似动物粪便负荷的地块。土壤径流中N、P、TOC和CI的浓度一般是牧场径流的4 ~ 6倍。
ABSTRACT RAINFALL runoff quantity and quality were deter-mined for a dairy open lot and a pasture area receiv-ing regular irrigation of dairy lagoon effluent. Over a 30-month period, percent of rainfall becoming runoff was 21 percent for the open lot and 10 percent for the pasture. The lot runoff had lower nutrient concentra-tions compared to data reported for beef feedlots and dairy lots of higher stocking density. Estimated average nitrogen yield from the lot was 234 kg/yr per hectare of lot. The pasture was irrigated with about 1 cm of lagoon effluent every other week during most of the study period. Concentration data from 11 events indicated that runoff N and P concentration were relatively high com-pared to other pasture runoff studies where the only animal waste input was from grazing cattle, but were similar to concentrations reported elsewhere for plots receiving comparable loadings of animal waste. Concen-trations of N, P, TOC and CI were generally 4 to 6 times greater in the lot runoff than in the pasture runoff.