土壤压实

土壤压实

土壤压实 减少土壤的总孔隙空间, limited pore space is restrictive to air and water movement throughout the soil. Compaction can be caused by tillage, wheel traffic, crop rotation, or raindrop impact.

University of Minnesota 扩展 (DeJong-Hughes et al., 2001)

寻找什么?

注意到 土壤结构呈片状, this is not ideal structure for water and air movement. Granular soil structure is a superior seed bed due to the pore space, nutrient holding capabilities and soil biology within those granular or aggregates 更多信息请参见聚合选项卡 .  右上方的照片显示了 密集的或 巨大的 压实土层的性质.

测定土壤压实度的工具

Agricultural soils will likely be compacted to some degree due to field traffic. The level of compaction will vary by farm, soil type, and across a single field.

The shovel: simplest tool to assess compaction on-farm. 你挖的时候碰到阻力了吗? If so you have found a compaction layer, this will likely be at the depth of your tillage. The soil penetrometer is another tool that will give you a resistance reading for comparison.

设法减少土壤压实

Managing for reduced compaction includes: reduce traffic in wet spring, 适当的轮胎充气, 控制交通, 等.

从一个 soil health prospective crop choice is an option to build soil structure over time with diverse root systems and improve overall soil health. 这种方法的关键是减少耕作, since each pass will break up soil structure in the zone of tillage.

包括多种作物轮作 为土壤提供不同的生根系统. 覆盖作物是另一种选择. 向日葵 and turnip are examples of deep rooting crops that with start to build downward channels in the soil. 想长期 当试图减少土壤压实, it takes a many years to build soil structure but the benefits are great in terms of crop productivity and soil health.

注意萝卜的深主根, large branching roots of the turnip and the small fibrous roots of a small grain. These very different root types together build soil aggregation.