华北平原典型区域农牧系统氮素流动及其环境效应 ——以河北省为例
Nitrogen Flow and Environmental Effects of Crop-Livestock System in Typical Area of North China Plain-A Case Study in Hebei Province
{{custom_ref.label}} |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
/
〈 | 〉 |