Water and anion movement under ridge tillage: a field study.
Water and anion movement under ridge tillage: a field study.
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垄耕下水和阴离子的运动：田间研究。
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
R. Horton
中科院分区：
文献类型：
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作者：
J. Hamlett;J. Baker;R. Horton
摘要垄作耕作配置，硝态氮（NO3-N）或其来源的放置在隆起的部分，可以潜在地隔离肥料从向下的水流和最小化硝酸盐淋失。降雨模拟研究，其中24，50，和72毫米的降雨被施加到脊和平坦的地块已与NO3-N和溴化物（Br）处理的数据报告。土壤分析的水，NO3-N，和Br表明，阴离子在脊的高架部分的放置减少了他们的淋溶相比，类似的应用程序与平坦的耕作，即使通过这两个系统的总水分运动是可比的。负离子的垂直迁移量远大于水平迁移量，且下降的深度随模拟降雨量的增加而增加。
ABSTRACT A ridge-tillage configuration, with placement of nitrate-nitrogen (NO3-N) or its source in the elevated portion of the ridge, can potentially isolate fertilizer from downward water flow and minimize nitrate leaching. Data are reported for a rainfall simulation study where 24, 50, and 72 mm of rain were applied to ridged and flat plots which had been treated with NO3-N and bromide (Br). Soil analyses for water, NO3-N, and Br showed that placement of anions in the elevated portion of the ridge reduced their leaching compared to a similar application with flat tillage, even though total water movement through both systems was comparable. Vertical anion movement was much greater than horizontal movement and the depth of downward movement increased as the amount of simulated rainfall increased.