The energy of sprinkler irrigation drops splashing on the soil surface or the crop canopy depends on their size and velocity. The kinetic energy of sprinkler irrigation drops is a major factor degrading the soil surface. The effect of a growing maize canopy on sprinkler drop energy dissipation and water partitioning was analyzed. A field experiment was performed on a solid-set sprinkler irrigated plot cropped with maize. Measurements were performed at different locations and heights into the sprinkler layout. Tests were performed at five maize heights. At each maize height, drop population characteristics and pluviometry were measured above and below the maize canopy. Drop population was measured with an optical disdrometer. Catch-can devices were used to measure pluviometry. Solid-set sprinkler irrigation distributes water quite homogeneously, but drop characteristics largely differ between layout locations. The effect of the crop on drop characteristics intensified as the canopy height increased. The canopy cover reduced drop diameter more than it reduced drop velocity. As the canopy grew, its capacity to intercept and derive irrigation water to stemflow increased. The largest part of energy dissipation by the maize canopy took place in the top 1.5 m. A fully developed maize canopy reduced the drop kinetic energy reaching the soil to 13.6% of that reaching bare soil. As a management practice, in sensitive soils or in sprinkler systems applying water with high specific kinetic power, irrigation of bare soils should be avoided.

喷灌的能量滴落在土壤表面或农作物冠层上，取决于它们的大小和速度。喷灌滴的动能是使土壤表面退化的主要因素。分析了生长的玉米冠层对洒水降能和水分配的影响。在装有玉米的固定式喷灌地块上进行了田间试验。在喷头布局中的不同位置和高度进行了测量。在五个玉米高处进行了测试。在每个玉米高度，均在玉米冠层的上方和下方测量滴落种群特征和比重法。用光学测干仪测量液滴总数。捕获罐设备用于测量水分测定法。固定式洒水灌溉相当均匀地分配水，但是放置特性在布局位置之间存在很大差异。随着树冠高度的增加，农作物对掉落特性的影响增强。顶篷罩减小的液滴直径大于减小的液滴速度。随着冠层的生长，其截留灌溉水并将其引向茎流的能力增强。玉米冠层最大的能量消散发生在顶部1.5 m。充分发育的玉米冠层使到达土壤的下降动能降低到到达裸土的下降动能的13.6％。作为管理实践，在敏感土壤或洒水系统中使用具有高比动能的水时，应避免灌溉裸土。顶篷罩减小的液滴直径大于减小的液滴速度。随着冠层的生长，其截留灌溉水并将其引向茎流的能力增强。玉米冠层最大的能量消散发生在顶部1.5 m。充分发育的玉米冠层使到达土壤的下降动能降低到到达裸土的下降动能的13.6％。作为管理实践，在敏感土壤或洒水系统中使用具有高比动能的水时，应避免灌溉裸土。顶篷罩减小的液滴直径大于减小的液滴速度。随着冠层的生长，其截留灌溉水并将其引向茎流的能力增强。玉米冠层最大的能量消散发生在顶部1.5 m。充分发育的玉米冠层使到达土壤的下降动能降低到到达裸土的下降动能的13.6％。作为管理实践，在敏感土壤或洒水系统中使用具有高比动能的水时，应避免灌溉裸土。充分发育的玉米冠层使到达土壤的下降动能降低到到达裸土的下降动能的13.6％。作为管理实践，在敏感土壤或洒水系统中使用具有高比动能的水时，应避免灌溉裸土。充分发育的玉米冠层使到达土壤的下降动能降低到到达裸土的下降动能的13.6％。作为管理实践，在敏感土壤或洒水系统中使用具有高比动能的水时，应避免灌溉裸土。