杨树伐桩嫁接与植苗林的生长及碳储量的比较  

Comparisons of Growth and Carbon Reserve between Stump Grafting Stand and Planting Stand

作　　者：李国会[1] 吴丽娟 张友焱[1] 党宏忠[1] 武晓莉[1] 周泽福[1] 刘志仁 张猛 

机构地区：[1]中国林业科学研究院荒漠化研究所,北京100091 [2]北京市大兴区林业工作站,北京102600

出　　处：《林业科学研究》2013年第6期800-804,共5页Forest Research

基　　金："十二.五"国家科技支撑课题"农田水土保持生物防护关键技术研究"(2011BAD31B02)

摘　　要：杨树具有易繁殖、生长快、成林早、轮伐期短、木材用途广泛、经济效益高和防护功能强等优点，已成为我国主要的营林树种。目前，我国杨树人工林面积达到742hm2，占整个人工林面积的13％。初期杨树成活率、保存率高，绿化效果好，但中后期林分抗逆性降低、自然枯死率增加，因此，需要对杨树林进行适时更新以达到持续发展，永续利用的目的。The leaf nutrient, biomass and carbon reserve of 9-year-old Populus x cv. ＇ 74/76＇ stump grafting stand with 26-year-old P. ~ xiaozhuanica W. Y. Hsu et Liang cv. ＇ Popularis＇ as rootstock, 26-year-old P. x xiaozhuanica W. Y. Hsu et Liang cv. ＇ Popularis＇ and 9-year-old P. ~ euramericana cv. ＇ 74/76＇ planting stands were compared. Ttle result showed that the average increment and the annual average increment of stump grafting stand were greater than the two planting stands. The total nitrogen content in leaves of stump grafting stand was the highest, and it was 1.26 times and 1.05 times as much as that of the planting stands of Populus x xiaozhuanica W. Y. Hsu et Liang cv. ＇ Popularis＇ and P. x euramericana cv. ＇ 74/76＇ separately. The total phosphorus content of that of the planting stands of P. x xiaozhuanica W. Y, Hsu et Liang cv. ＇ Popularis＇ and P. ~ CV. ＇ 74/76＇ The biomass of aerial parts and the biomasses of trunk, branches and leaves of stump grafting stand were 1.84, 1.80, 1.76, and 3.00 times as much as that of planting stand of P. x euramericana cv. ＇ 74/76＇ separate- ly. The total root biomass of the stump grafting stand was 1.42 times and 7.68 times as much as that of planting stands of 26-year-old P. x xiaozhuanica W. Y. Hsu et Liang cv. ＇ Popularis＇ and 9-year-old P. x euramericana cv. ＇74/76＇ There was an obvious advantage in carbon reserve from all the parts of the stump grafting stand carbon sequestration capacity was the highest, which was 2.66 times and 1.62 times as much as that of stands of 26-year-old P. x xiaozhuanica W. Y. Hsu et Liang cv. ＇ Popularis＇ and 9-year-old P. x ＇74/76＇. These showed that the stump grafting stand had more advantages than planting stands. and the planting

关 键 词：杨树 根桩嫁接 土壤养分 叶片养分 碳储量 生物量 

分 类 号：S792.11[农业科学—林木遗传育种]