临安市不同森林植被枯落物营养元素与土壤肥力分析

对浙江省临安市阔叶林、杉木林、马尾松林等森林植被枯落物的营养元素及林地土壤肥力进行了分析。结果表明,不同植被枯落物营养元素含量差别较大,阔叶林枯落物含有较高的氮、钾、镁、锰、锌、铁,杉木林枯落物含有较高的钙,磷在3种植被枯落物中的含量差别不大。8种营养元素在枯落物中的总贮量表现为：阔叶林〉杉木林〉马尾松林。阔叶林土壤有机质、水解氮、速效磷、非毛管孔隙含量较高,而土壤容重较小;杉木林土壤交换性酸、交换性铝含量较高,而pH值较低。枯落物中营养元素贮量与土壤容重、交换性酸、交换性铝含量呈负相关,而与土壤有机质、水解氮、速效磷、非毛管孔隙含量呈正相关。

Analysis on the Nutrient Elements in Litters of Different Forest Vegetations and the Soil Fertility

The nutrient elements in litters of forest vegetations of broad-leaf forest,fir forest and Pinus massoniana forest in Lin'an City of Zhejiang Province and its soil fertilities of forest lands were analyzed.The results showed that the contents of nutrient elements in litters of different vegetations were very different,the contents of nitrogen,potassium,magnesium,manganum,zinc and iron in litters of broad-leaf forest were higher,that of calcium in litters of fir forest was higher and the phosphorous contents in litters of 3 vegetations had little difference.The total storage amounts of the 8 nutrient elements in litters were shown as: broad-leaf forest > fir forest > P.massoniana forest.The contents of organic matter,hydrolyzable nitrogen,radily available phosphorous and non-capillary interstice in soil of broad-leaf forest were higher and its bulk density of soil was less.The contents of exchangeable acid and exchangeable aluminum in soil of fir forest were higher and its pH value was lower.The storage amounts of nutrient elements in litters were negatively related to bulk density of soil and contents of exchangeable acid and exchangeable aluminum,but positively related to the contents of organic matter,hydrolyzable nitrogen,radily available phosphorous and non-capillary interstice in soil.