人工补水促进侧柏林地的种子萌发及天然更新

Artificial Water Supplement to Enhance Seed Germination and Natural Regeneration in Plantation of Platycladus orientalis

随着侧柏(Platycludus orientalis)林进入中成熟龄阶段,其更新和健康经营问题逐渐凸显出来。【目的】解决侧柏林内土壤湿度不足、籽苗稀少的问题并确定最佳补水时期。【方法】依据山地水土汇集面、沟谷两侧和集水池周边侧柏籽苗较密集的现实,进行人工促进侧柏林地种子萌发和天然更新的研究,应用小穴整地、模拟天然下种、人工灌水和林地模拟育苗等手段。【结果】于2017年秋季在济南燕子山上成功地促生许多侧柏苗。侧柏种子成熟期林地土壤水分不足是种子萌发的限制性因素之一。【结论】秋季9月为灌溉补水人工促进侧柏种子萌发的关键期,在适宜的光照条件下,可以有效地促进林地种子萌发和籽苗存活。

As the plantations of Platycladus orientalis grow into middle age or become mature,the requirement of healthy management and regeneration of it manifests itself.【Objective】Solve the problem of less soil moisture,shortage of seedling and sapling and the optimum time of water supplement.【Method】We studied the enhancement approach of natural regeneration,based on the evidence of massive seedlings along the slop and canal banks converging water and soil,and around the water pool,by using the methods of small pit preparation,seedling cultural modeling in stands and artificial irrigation.【Result】A lot of seedlings germinated successfully in the droughty fall of 2017 at the hill site of Yanzishan in Jinan.Meanwhile,one confining factor of the seed germination in the stands of Platycladus orentalis is the shortage of soil moisture and the key stage to enhance its seed germination by artificial water supplement is in September.【Conclusion】It can effectively improve the seed germination and seedling surviving in plantation of Platycladus orentalis under proper light condition.