为了解楚雄市国有林场樟檀林分场华山松无性系种子园中6个种源间生长性状的差异,在种子园内,随机选取96个无性系的5个重复,利用测高仪、测树围尺分别测量树高和胸径,共测量480个单株,并对不同华山松无性系优株的树高、胸径生长量进行方差分析.结果表明,华山松6个种源间树高和胸径存在显著差异;LSD多重比较结果显示,会泽种源树高平均值最高与楚雄和巍山种源存在显著差异,其他5个种源间树高差异不显著;会泽胸径平均值最高与宜良、南华、巍山、楚雄和腾冲种源差异显著,其他5个种源间胸径差异不显著,表明会泽种源的华山松在种子园内生长速度最快.研究结果可为无性系选育和木材加工提供重要理论和参考依据.

以弥勒市近几年来石漠化治理现状,治理中的困难进行分析,提出了弥勒市治理石漠化的对策措施.

With a long planting history of walnut in Mile,the main problem of walnut cultivation is that the walnut bearing fruit rate is low(generally only about 10%-15%,the lowest less than 5%).In order to increase the bearing fruit rate measures should be taken to solve this problem: flower promotion and fruit retention.