木荷凋落物分解及对土壤作用规律的研究

在福建省永春碧卿林场开展的木荷凋落物分解及土壤淋溶试验表明 :木荷人工林凋落物量和养分积累量下坡 >中坡 >上坡 ,养分积累量Ca >N >K >Mg >Fe >P >Zn >Cu ;凋落物分解的失重率Ws与时间t之间存在Ws =34 45 2Lnt -3 0 741(R =0 98)的对数关系 ;木荷凋落物可通过增加土壤有机质 ,提高土壤和下渗液的盐基量 ,提高土壤pH值 ,降低土壤水解性总酸度等途径来缓解土壤的酸化作用

Studies on the Decomposition of Schima superba Litter and on the Law of It on the Soil Effect

The experiment indicates that the litter amount and nutrient accumulative amount of Schima superba plantation on the lower slope are>those on the middle slope>those on the upper slope and the nutrient accumulative amount is Ca>N>K>Mg>Fe>P>Zn>Cu;there is a logarithmic relation between Ws(the weightlessness rate of litter decomposition) and t(time):Ws=34.452Ln(t)-3.0741(R=0.98);and the litter of S.superba can relieve the soil acidification effect by the ways of increasing the soil organic matter,raising the salt base content of soil and infiltration liquid,enhancing the soil pH value,and reducing the total acidity of soil hydrolysis.