Compaction of a silt loam soil by wheeled agricultural vehicles. I. Effects upon soil conditions
Compaction of a silt loam soil by wheeled agricultural vehicles. I. Effects upon soil conditions
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用轮式农用车压实淤泥壤土。
DOI：
10.1016/0167-1987(86)90011-5
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发表时间：
1986
影响因子：
6.5
通讯作者：
A. Butler
中科院分区：
文献类型：
--
作者：
P. Blackwell;J. P. Graham;J. Armstrong;M. A. Ward;K. Howse;C. J. Dawson;A. Butler
1983年秋，在粉壤土上进行了零交通、低地压交通、中重型联合收割机交通（最大轴重13.2t，最大轮胎充气压力118 kPa）5种轮压处理，然后进行冬小麦直播。土壤在前15个月内没有耕种，当在地块的整个宽度上滚动时，土壤的含水量在塑料下限和田间容量之间。车轮压实的孔隙度损失取决于轮胎充气压力;最大的最大轴载将孔隙度降低到50厘米深。在15厘米的深度内的治疗，土壤大孔隙度范围在3和20%v/v和锥电阻在秋季之间约0.5和2.0 MPa。在这个相对干燥和温暖的生长季节，这些不同的土壤条件的影响更显着的土壤通气比土壤温度。1984年5月的异常大雨减少了处理之间的土壤结构差异，当最沉重的轮式土壤获得约3%的大孔隙度，变得更弱。
In the autumn of 1983, five wheel-compaction treatments, including zero traffic, low-ground-pressure traffic, medium and heavy combine harvester traffic (maximum axle loads up to 13.2 t, maximum tyre inflation pressures up to 118 kPa) were applied to a silt loam soil before direct-drilling winter wheat. The soil had not been cultivated in the preceding 15 months and was at a water content between the lower plastic limit and field capacity when wheeled across the full width of the plots. Loss of porosity by wheel compaction depended on tyre inflation pressure; the largest maximum axle load decreased porosity to 50-cm depth. At 15-cm depth within the treatments, soil macroporosity ranged between 3 and 20% v/v and the cone resistance in the autumn between about 0.5 and 2.0 MPa. In this relatively dry and warm growing season, effects of these different soil conditions were more noticeable upon soil aeration than upon soil temperature. The soil structural differences between the treatments were diminished by the unusually heavy rains in May 1984, when the most heavily wheeled soil gained about 3% macroporosity and became weaker.