【摘要】 对国外松生态混交林的林分生长及其对土壤肥力的影响进行研究。结果表明,针阔混交林不仅可提高林分生产力,而且对土壤质地、通气性、土壤肥力都比纯林有明显的改善;通过逐步间伐国外松,把达到数量成熟年龄的国外松针阔混交林更替为生产大径材的阔叶林,是国外松生态栽培的一种有效途径;在国外松人工林早期间伐后的林分中引进速生阔叶树种和在灌木林下开天窗营造国外松的试验林,综合效益高。更多还原

【Abstract】 The growth of several ecologic mixed slash pine(or loblolly pine) plantation and it’s effect on soil fertility were studied.The results showed that it is effective to ecologcally cultivate slash pine (or loblolly pine) by intermediate cutting it and changing single row mixed forest of broad-leaf species and conifer into broad-leaf forest which could provid large timber.lt was of highet general benefit to update faster-growing broad-leaf species in the forest stands of slash pine(or loblolly pine) plantation that was early intermediate cut and to open conopy and plant an experimental forest of slash pine(or loblolly pine) under shrub forest。更多还原