犁底层
又称亚表土层。紧接耕作层之下较为紧实的土层。系受农具（主要是犁）长期反复压实所致。呈片状、层状结构，腐殖质显著减少。一般离地表12～18cm，厚约5～7cm。如果犁底层深度适当，松紧适宜，可兼有保水、透水效能，则有利于作物生长；如果位置过高，过于紧实，则对作物生长不利。通道深耕、施肥等农业技术措施，可以改造犁底层。
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Contributor
contributed at 2011-12-23
Classification(s)
●
Earth System(in Chinese) Soil Science
Detailed Description
| English |
|---|
| Name | plow pan |
| Chinese |
|---|
| Name | 犁底层 |
| Description | 又称亚表土层。紧接耕作层之下较为紧实的土层。系受农具（主要是犁）长期反复压实所致。呈片状、层状结构，腐殖质显著减少。一般离地表12～18cm，厚约5～7cm。如果犁底层深度适当，松紧适宜，可兼有保水、透水效能，则有利于作物生长；如果位置过高，过于紧实，则对作物生长不利。通道深耕、施肥等农业技术措施，可以改造犁底层。 |
How to Cite
NNU_Group (2011). 犁底层, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/1ea227a1-b7c6-4db6-8cc9-242b1d3fe7f3
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