杉木种子园营林性疏伐促进“开花”结实效果  

THE EFFECT OF MANAGERIAL THINNING FOR PROMOTING FLOWERING IN AN OVERSTOCKED CHINESE FIR SEED ORCHARD

作　　者：施季森[1] 叶志宏[1] 余荣卓 李寿茂 翁玉榛 

机构地区：[1]南京林业大学,福建省洋口林场

出　　处：《南京林业大学学报（自然科学版）》1994年第3期83-86,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家"八五"攻关项目

摘　　要：１４年左右杉木种子园经高强度营林性疏伐（伐去４０％～５０％）后连续两年测定了疏伐区和对照区（未疏伐）微生态因子和母树的生物学反应。结果表明，疏伐后明显改善了种子园内微生态环境，降低了相对湿度和提高了撒粉期的风速，尤其是日照强度提高了近十倍，从而直接提高了花期花粉飞撒量（提高１．５倍）。疏伐后次年春和第三年春调查发现疏伐区雌球花数增加了３倍，雄球花数增加了２．１４倍。树冠新枝（梢）数增加了８倍。疏伐后第四年种子产量恢复到３０～４５ｋｇ／ｈｍ￣２。The micro-ecological factors and the biological reaction of the stocks in a fourteen-year-oldseed orchard were observed in the thinned and unthinned areas over two years after intensive thinning(about 40% ～50% trees were removed).The results were shown that the micro-ecological environmental factors in the thinned areas were much improved,such as relative low humidity,high windspeed during pollen dispersal Period,Especially the intensity of sunshine is about 10 times highter inthe thinned areas than that in the unthinned areas.The relative amount of pollen dispersal is 1. 4 timeshigher in the thinned areas.The female, male flowers and new shoots on the crown were 3, 2. 14 and8 times increased respectively.The seed outputs had reached to 30～45 kg/hm￣2 in the fourth year after being thinned.It is concluded that conducting intensive thinning will be helpful to the promotion offlower-bearing and corn-bearing in some adult seed orchard.

关 键 词：杉木 种子园 疏伐 促进结实 

分 类 号：S722.83[农业科学—林木遗传育种]