Managing Runoff from a Small, Paved Beef Feedlot
Managing Runoff from a Small, Paved Beef Feedlot
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管理小型、铺砌牛肉饲养场的径流
DOI：
10.2134/jeq1983.00472425001200020026x
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
R. K. White
中科院分区：
文献类型：
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作者：
W. Edwards;L. Owens;R. K. White
在 3 年的时间里，每年在 243 平方米的铺砌场地上，用玉米青贮饲料和带壳玉米日粮喂养 56 头犊牛，使其达到市场体重。暴雨径流在离开饲养场时进行了测量和采样，并在其通过一个浅的混凝土沉淀池和两个连续的 30 m 长 x 4.5 m 宽的草皮过滤带后再次进行了测量和采样。秋季和冬季期间，暴风雨径流量和 TS（总固体量）、COD（化学需氧量）、BOD₅（5 天生物需氧量）、N（总氮）和 P（总磷）的输送量较小，此时牛体型较小且饲喂青贮饲料，而 5 月至 7 月期间则较小，此时牛体型较大且吃带壳玉米。沉降池减少了约 55% 的 TS 和 COD 输送，同时仅保留了 35-40% 的 BOD₅、N 和 P。滤带中所有参数的总减少量增加至 80-90%。该盆地在大风暴事件中更有效，并且当可沉降固体沉降后缓慢排水盆地时，过滤带更有效。过滤带上的降雨降低了大风暴期间所有参数的浓度，而其他事件期间的渗透减少了向下游地区的运输。
Each year for 3 y, 56 steer calves were fed to market weight on a corn-silage and shelled-corn ration in a 243-m² paved lot. Storm runoff was measured and sampled as it left the feedlot, and again after it passed through a shallow, concrete settling basin and two consecutive 30 m long by 4.5 m wide sod filter strips. Storm runoff amounts and transport of TS (total solids), COD (chemical oxygen demand), BOD₅ (5-d biological oxygen demand), N (total nitrogen), and P (total phosphorus) were smaller during the fall and winter months, when the steers were small and being fed silage than during May through July, when the animals were larger and eating shelled corn. The settling basin reduced transport of TS and COD by about 55%, while retaining only 35–40% of the BOD₅, N, and P. Total reduction of all parameters was increased to 80–90% in the filter strips. The basin was more effective in large storm events, and the filter strips were more effective when the basin was slowly drained after settling of the settleable solids. Rainfall on the filter strips reduced the concentration of all parameters during large storms, and infiltration during other events reduced transport to downstream areas.