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在橡胶园及其防风林更新时,用人工倒树和挖根,不仅劳动强度大,而且效率低。为此,华南热带作物机械化研究所曾研制成TW—3型推树挖根机。该机1983年在湛江红星农场使用时,平均生产率超过150株/班·台,是人工伐倒树效率(12株/人·日)的12.5倍。作业成本曾低至平均每株0.56元,比人倒树0.86元/株降低34.9%。能适用于树径20～40厘米的橡胶树和树径为15～30厘米的防风林的倒树作业,也可用于挖起已腐树桩和伐后树蔸。该机可利用农场现有动力,可与东方红—75或东方红—60拖
When the rubber plantation and its windbreaks are updated, it is not only labor-intensive but also inefficient to manually invert trees and dig roots. To this end, South China Tropical Crops Institute of mechanization has developed TW-3-type tree-pushing machine. When it was used at Red Star Farm in Zhanjiang in 1983, the average production rate of this machine was more than 150 plants / class, which was 12.5 times of the efficiency of artificial tree-cutting (12 plants / person · day). Operating costs have been as low as an average of 0.56 yuan per plant, down 0.86 yuan than the tree / plant decreased 34.9%. The utility model can be used for the reverse tree planting of the rubber tree with the diameter of 20-40 centimeters and the windbreak of 15-30 centimeters diameter, and can also be used for digging the already-stubbed stumps and the post-cutting tree stumps. The aircraft can use the existing farm power, can be Dongfanghong -75 or Dongfanghong -60 drag