论文部分内容阅读
采取室内与野外试验相结合的方法 ,研究了赤松种子萌发与幼苗生长规律 ,结果表明 :①赤松种子发芽比较容易 ,当年采的种子和贮存 1、2a后的种子在生活力方面没有太大的差异 ;②不同处理样方内种子的野外发芽率偏低 ,从出苗率和保存率来看 ,人工更新 >人工促进天然更新 >天然更新 >对照 ;③土壤中赤松种子可以保持 2a以上的萌发能力 ,但经过一个生长季后 ,赤松地下种子库也基本上消耗完了 ,其天然更新是靠种子较强的飞散能力和较丰富的种源供应来维持的 ;④赤松更新苗的萌发从 5月 2 1日开始至 7月 2日结束 ,共历经 42d。
The indoor and field experiments were carried out to study the rules of seed germination and seedling growth of Pinus densiflora. The results showed that: ① The seeds of Pinus densiflora were relatively easy to germinate. The seed and the seeds after storage for 1 and 2 years were not too large in vitality Difference; ② The germination rate of seeds in different treatment quadrats was low, artificial regeneration> artificial regeneration> natural regeneration> control; the seedling of Pinus densiflora in the soil could maintain the germination ability above 2a , But after a growing season, the seed bank of Pinus densiflora was also basically depleted. Its natural renewal was maintained by strong seed dispersal ability and richer seed supply. (4) The seedling emergence of Adenophora increased from May 2 Beginning on the 1st to the end of July 2, a total of 42d.