| On the basis of collecting plenty reference about green fire prevention for forest, throughdata collecting and field investigation, the combustible type, distribution and feature in LiyangLongtan Forest Farm have been studied. By analyzing burned areas and the discipline of Firehappening, Fire-prevention belt of Liyang Longtan Forest Farm has been planned. The mainresults are as following:According to the mian component of forest, it can be divided into six types. They arePhyllostachys edulis, Pinus massoniana, Cunninghamia laceolata, Castanea mollissima,Camellia sinensis and the others. The graph about forest fire danger has been drawn accordingto their combustibility. Fire risk regions can be respectively represented by degreeⅠ, degree Ⅱ,and degree Ⅲ.The planning of green fire prevention has been produced according to the localenvironmrnt and the tree types suitable for the construction of fire forest-prevention belt havebeen fixed. There are20species of evergreen arbors, belong to11families.34species ofdeciduous trees belong to20families and.14species of evergreen shrubs belong to11families.And9species of deciduous shrubs belong to8families. Woody plants sum to77species.The fire forest-prevention belt of Longtan Forest Farm can be divided into three classes.The first class is arranged along ridge, which is20to30meters wide. The second class is thebranch of the belt, should be along the ridge or forest compartment boundary, land categoryboundary with width of10to20meters. The third class should arrange auxiliary shelter beltalong forest edge, forest compartment boundary and sublot with width of6to10meters.Structure of forest belt is mainly single-layer and sparse. Its ventilation coefficient is between0.43and0.5. Its planting patterns include square, triangle, determinant, Blossom-form andmixed type which can be decided by tree speciality and site condition. Above all, the planningmap about green forest fire prevention in Liyang Longtan Forest Farm has been drawn. Finally,social benefit, economic benefit and ecological benefit produced by green forest fire preventionhave been summed up. |
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