Soil Physico-chemical Properties under Larix principis-rupprechtiiPlantations of Different Stand Densities

Abstract

Abstract: Soil physico-chemical properties under Larix principis-rupprechtii plantations of different stand densities were studied in Beigou Forest Farm,Mulanweichang,Hebei Province.The results showed that stand density affected soil physico-chemical properties to varied degrees.At the stand density of 660 trees/hm²,soil water content,total N and total K content were maintained at relatively high levels;when the stand density increased from 740 trees/hm² to 2000 trees/hm²,soil bulk density decreased first and then increased,but soil water content,total N and organic matter content showed the opposite trend in the soil depth of 0~20 cm;In the soil depth of 20~60 cm,soil bulk density showed the same pattern as that in the soil depth of 0~20 cm,soil water content and soil rapidly available K content kept decreasing,but soil available P content increased with increasing soil depth.With the stand density of higher than 2000 trees/hm²,soil pH declined and showed a significant trend of acidification.Therefore,the stand density of Larix principis-rupprechtii plantations was suggested to be about 1500 trees/hm² and no more than 2000 trees/hm² to avoid soil acidification and to keep soil healthy.

Key words: Larix principis-rupprechtii, soil physico-chemical property, stand density, soil health

CLC Number:

S714.2

SUN Jia, WANG Haiyan, DING Guodong, YU Yang, REN Lina, LIANG Wenjun. Soil Physico-chemical Properties under Larix principis-rupprechtiiPlantations of Different Stand Densities[J]. FOREST RESOURCES WANAGEMENT, 2011, (1): 62-66.

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