采伐迹地不同造林树种水土保持效果初步研究

Initial Study on the Soil Conservation Effects by Different Afforestation Tree Species in the Deforested Lands

在安溪县开展采伐迹地种植福建柏、杉木和山杜英水土保持效果的研究,2017~2019年连续3年观测福建柏、杉木和山杜英地块的植被盖度、土壤流失量、地表径流量和土壤中全氮、全磷和全钾流失量,结果表明,植被盖度大小为山杜英地块>福建柏地块>杉木地块,土壤流失量和地表径流量表现为杉木地块>福建柏地块>山杜英地块,土壤中全氮、全磷和全钾流失量表现为杉木地块>福建柏地块>山杜英地块,水土保持效果表现为山杜英地块>福建柏地块>杉木地块。从水土保持角度,在安溪乃至闽南山区林地种植山杜英和福建柏较为理想。

The study was carried out in the deforested lands the soil conservation effect by planting the Fokienia hodginsii(Dunn)Henry Thomas,Cunninghamia lanceolata(Lamb.)Hook.and Elaeocarpus sylvestris(Lour.)Poir in Anxi County.From 2017 to 2019,it was observed vegetation coverage,soil loss volume,surface runoff,and the loss of total nitrogen,total phosphorus and total potassium in soil of the Fokienia hodginsii(Dunn)Henry Thomas,Cunninghamia lanceolata(Lamb.)Hook.and Elaeocarpus sylvestris(Lour.)Poir land plots.The results show that the decreases in the sequence of vegetation coverage and soil conservation effects are Elaeocarpus sylvestris(Lour.)Poir.>Fokienia hodginsii(Dunn)Henry Thomas>Cunninghamia lanceolata(Lamb.)Hook.land plots.The decreases in the sequence of soil loss,surface runoff,losses of the total nitrogen,total phosphorus and total potassium in soil are Cunninghamia lanceolata(Lamb.)Hook.>Fokienia hodginsii(Dunn)Henry Thomas>Elaeocarpus sylvestris(Lour.)Poir.land plots.Therefore,from the perspective of soil conservation,planting of Elaeocarpus sylvestris(Lour.)Poir.and Fokienia hodginsii(Dunn)Henry Thomas is the good option in the forest land in Anxi County or even in the south mountain areas of Fujian Province.