马尾松木荷混交林采伐模式对土壤效应研究

对马尾松木荷混交林开展不同采伐模式试验研究,结果表明:采伐时留下少许木荷能大幅度提高土壤有机质、全氮、全磷、速效氮、速效磷及速效钾含量,且土壤中团聚体含量高,非毛管孔隙度大,土壤疏松,贮水量大,留少许木荷不采伐可有效提高土壤肥力。而皆伐作业的林地化学性质差,土壤团聚体含量低,非毛管孔隙度小,贮水能力低。建议山地人工林采伐留适量林木以维持地力。

STUDY ON EFFECT OF CUTTING MODEL OF MASSON PINE AND SCHIMA SUPERBA MIXED FOREST ON SOIL FERTILITY

Experiments of different cutting models were carried out in the mixed forestry of Masson pine and Schima superba.The result showed that some trees of schima superba were left when cutting could greatly improve soil organic matter,Total N,Total P,Available P and Available K,and the content of soil aggregation was much more,Noncapillary pore degree was bigger,the soil was loosen and storage capacity was larger. While clearing models made the chemical character of soil become worse,the content of soil aggregation fell,Noncapillary pore degree was smaller and storage capacity of soil lowered.It is suggested to Leave some trees when plantation forestry is cut in order to keep soil fertility.