我区有9～15％的林业用地属于沼泽。在造林地日渐紧张的情况下,向沼泽地进军已是事在必行。在沼泽地上栽植落叶松往往需要机械开排水沟,经全面整地后方可进行。这样,用工较多,投资大,提 My area has 9 ~ 15% of the forestry land belongs to the swamp. It is imperative to march into wetlands in the face of growing tension in the land. Planting larches in swamps often requires mechanically draining ditches that can only be carried out after a complete land preparation. In this way, more labor, investment, mention