<正>研究了7种外生菌根真菌对马尾松、黑松和湿地松出苗和生长的影响。结果表明，播种时接种外生菌根菌可提高种子的出苗率，并使出苗时间提前。菌根菌能显著提高松苗的苗高、地径、侧根数和干重。3种松苗中，菌根菌对马尾松生长的促进作用最明显，其次为黑松，再次为湿地松。就各种菌根菌而言，以504菌株的接种效果最好，其次为EG；Pt2对马尾松和黑松的促生效果较好；Pt1和ZJ对3种松苗促生效果相对较差；505和HX仅对马尾松的促生效果较明显。菌根菌对松苗促生作用的大小与菌根形成状况有一定关系。

In this paper the important value of 39 main species was measured and the niche breadth, niche similarity and niche overlap of 15 dominant species were calculated with Levins, Shannon-Wiener formulas by sampling method in evergreen broadleaved forest in Linnan Nature Reserve. The results showed that the niche breadths of main dominant species were higher. The Levins and Hurlbert’s niche breadths of Schima superba, Loropetalum chinense and Castanopsis eyeri, the main dominant species, were 0.9839, 0.9148, 0.8731 and 0.9926, 0.9587, 0.9279 respectively. The niche proportional simulation between the species with broad niche breadth was much great, Schima superba with Loropetalum chinense, Castanopsis eyeri were 0.8132, 0.8131. The niche overlaps between the species with broad niche breadth and other species were high, the niche overlaps of the dominant species Schima superba with others were from 0.2981 to 0.3631, those between the species with broad niche breadth and others species were much less, the niche overlaps of Cyclobalanopsis glauca with others were from 0.0097 to 0.2800.