祁东县位于湖南省中部,属于低山丘陵地区,形成土壤的母岩有老第三纪紫色砂页岩,石炭纪石灰岩,变質岩(千板岩、板岩、石英岩筹)以及复盖在其他岩层上的第四纪紅色粘土等。該县水稻种植面积佔全县耕地面积80%以上,经过我们調查,对不同类型水田土壤的深翻深度问题,提出几点意见以供有关方面参考。(一)深翻不应超过50厘米的土壤 Qidong County is located in the central part of Hunan Province, belonging to the hilly region. The parent rocks formed in the soil are the Old Tertiary purple sand shale, Carboniferous limestone, metamorphic rocks (Qianlian, Slate and Quartzite) and complex Quaternary red clay covered in other formations. The county’s rice acreage accounts for more than 80% of the county’s arable land. After our investigation, we put forward some suggestions on the deep furrow depth of different types of paddy soils for reference. (A) deep plowing should not exceed 50 cm of soil