短语词组短语plant mulching 植物覆盖mulching film 地膜覆盖;育秧薄膜mulching treatment 覆盖处理;揭膜处理;覆盖还田mulching measures 覆盖措施;覆盖mulching materials 覆盖材料surface mulching 表面覆盖;覆盖;地表覆盖Mulching model 覆盖模式;种植模式Mulching plastic 地膜ring mulching 环状覆盖 返回 mulching