修剪强度对马尾松成年种子园母树的影响

Effect of Different Pruning Intensity in the Seed Orchard of Pinus massoniana L. Trees

以16年生的马尾松嫁接种子园成年母树为研究对象,采用保留不同轮枝数(A:保留第1轮枝;B:保留2轮枝;C:保留3轮枝;D:保留4轮枝;以不做修剪作为对照(CK))的修剪方式开展母树矮化试验,观测其对母树生长和开花的影响。结果表明:保留轮枝数越少越能改善母树光照条件,有效降低母树主干高度,增强母树抽稍能力,增加雌配子体数量,方便管理。不同处理后除雄配子体数量低于对照,其它指标均优于对照,以处理A的效果最佳。

We used 16 years grafting adult trees in seed orchard of Pinus massoniana as the research object. By the way of retaining different wheel branch number,（including retaining the first wheel branches（A）,retaining the second wheel branches（B）,retaining the third wheel branches（C）,retaining the fourth wheel branches（D）,and retaining all wheel branches as control（CK）） we carried out dwarf clip for mother tree,and observed the effect on the mother trees in growth and flowering. Results showed that retaining less wheel branches can improve the mother tree light conditions,effectively reduce the height of the parent tree trunk. Enhance the capacity of shoot growth of mother tree,and increase the number of female gametophyte. In addition,these pruning treatments can inspire us more convenient management. In addition to the lower number of male gametophyte,other indicators are better than control after different treatments In this study,treatment A showed the best results.