榆林毛乌素沙地樟子松种子园提高结实量措施

Measures for Increasing Amount of Seed-bearing of Clonal Pinus sylvestris Seed Orchards in Yulin

为探讨樟子松种子园内无性系间结实量差异,为优良无性系的再选择提供依据,于2006年和2007年选取65株标准木进行结实情况调查.结果表明,无性系之间的结实数量具有明显的不平衡性,少数无性系在种子生产中占据主导地位.针对毛乌素沙地降水少而蒸散强烈以及土壤瘠薄的具体情况,采取浇水、施肥等措施促进母树结实.浇水能明显提高母树的结实产量,但无性系之间的反应具有一定差异;施肥不仅可以促进母树营养生长,同时也能提高母树的结实量.

In order to explore the differences in fruitification of seed orchard of Pinus sylvestris and to provide a basis for re-selection of excellent clone, we chose 65 standard woods to survey on the spot. The result showed the quantity of seed-bearing between clones had of non-equilibrium, a few clones played dominant role in seed production. Focus on actual conditions of little rain falls but strong vapor and bar- ren soil in Maowusu, we proposed to promote mother tree to bear more seeds through watering and fertilizing. However, there were different performances in different clones. One thing was certain that fertili- zing not only encouraged mother tree to grow but also increased the seed amount of mother tree.