赤松天然更新规律及人工促进更新技术的研究

Study on Natural Regeneration Regularity and Manually Accelerating Methods of Natural Regeneration of Pinus densiflora Sieb. et Zucc.

本文对赤松天然更新的规律进行了调查 ,并对人工促进更新技术进行了研究。结果表明 ,赤松初果期为 12 a,盛果期为 51a;赤松最大更新幅度为 4 0 m ;更新幼苗幼树的 70 %以上集中分布在距母树 9m或树高 1.2倍以内。人工促进效果以拖拉机耙地和人工耧地为好 ;只要耧掉草皮 ,移栽 7～ 8a幼树 ,3～ 4 a就可达到更新指标 ;

Regularity of natural regeneration and manually accelerating regeneration of Pinus densiflora Sieb.et Zucc were studied in this paper. The result showed that the bearing age of Pinus densiflora Sieb.et Zucc. tree is 12 years and its best fruit period is 51 years. The farthest distance between natural seedlings and its mother tree is 40 meters. Seventy percent of regenerated seedlings and saplings distribute within 9 meters around the mother trees or within one point two times of the mother tree height. Plowing by tractor or by man can get a good effect for artificial regeneration. The regeneration standard can be reached in 3 to 4 years by means of transplanting sapling in 7 to 8 years old after plowing the sod off. The amount of remained mother trees per unit area has to decrease with time going on.