飞播马尾松纯林补植木荷后土壤酶活性与土壤养分变化

以飞播马尾松(Pinus massoniana)纯林及飞播马尾松—木荷(Schima superba)混交林2种林型为研究对象,探讨其土壤脲酶、蔗糖酶和酸性磷酸酶活性与土壤养分的变化及相关关系。结果表明:2种林型同一土层蔗糖酶活性、全氮质量分数、速效钾质量分数差异显著(P0.05),脲酶活性在0~10 cm土层差异显著(P0.05),酸性磷酸酶活性在10~20 cm和20~40 cm土层差异显著(P0.05),全磷、有机质质量分数在0~10 cm、10~20 cm土层差异显著(P0.05);随着土层加深,2种林型土壤脲酶、蔗糖酶、酸性磷酸酶和土壤养分均呈明显下降趋势;脲酶、蔗糖酶与全氮、全磷、速效氮、速效钾、有机质呈极显著正相关(P0.01),与全钾呈显著正相关(P0.05);酸性磷酸酶与全磷、速效磷、有机质呈极显著正相关(P0.01),与速效氮呈显著正相关(P0.05)。综合分析表明,飞播马尾松纯林补植木荷有利于提高土壤养分含量及脲酶、蔗糖酶的活性,改善土壤状况。

Variation of Soil Enzyme Activity and Soil Nutrients in Aerially Seeded Pinus massoniana Plantation Replanting with Schima superba

We took the aerially seeded Pinus massoniana plantation and mixed forest of Pinus massoniana and Schima superb to study the variation and relation between soil nutrients and the activity of urease, invertase and acid phosphatase.The in-vertase, total nitrogen and available potassium of the two forest types at the same soil layer showed significant differences ( p<0.05) , the differences of urease of two forest types were significantly at 0-10 cm soil layer ( p<0.05) , while the differ-ences of acid phosphatase were significantly at >10-20 cm and >20-40 cm soil layers (p<0.05), and total P, organic mass fraction at 0-10 cm,>10-20 cm soil layers ( p<0.05) .The soil urease, invertase, acid phosphatase and soil nutri-ents of two forest types were significantly decreased with the increase of soil depth.The soil urease, invertase and total ni-trogen, total P, available N, available K and organic matter had a extremely significant positive correlation (p<0.01), a positive correlation with total potassium ( p<0.05) , acid phosphatase and total P , available P and organic matter had a ex-tremely significant positive correlation (p<0.01), and was positively correlated with available N (p<0.05).The aerially seeded Pinus massoniana plantation with Schima superb as complimentary planting can help to enhance soil nutrients, and activity in urease and invertase.