人工控制增温和施氮对丝栗栲和苦槠幼苗生长状况的影响  

Effects of Warming and Nitrogen Application on the Growth Status of Castanopsis Fargesii and Castanopsis sclerophyll Seedlings under Artificial Control Conditions

作　　者：喻志强[1,2] 赵广东[1] 王兵[1] 邓宗富[3] 杨清培[4] 贺小云[3] 

机构地区：[1]中国林业科学研究院森林生态环境与保护研究所国家林业局森林生态环境重点实验室,北京100091 [2]长江水利委员会长江科学院水土保持研究所,湖北武汉430015 [3]中国林业科学研究院亚热带林业实验中心,江西分宜336600 [4]江西农业大学/江西省竹子种质资源与利用重点实验室,江西南昌330045

出　　处：《江西农业大学学报》2013年第1期102-107,共6页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金项目(30870193和31170306);国家林业局公益性行业科研专项(200804022E)

摘　　要：以中亚热带典型常绿阔叶林的主要优势树种丝栗栲(Castanopsis fargesii)和苦槠(Castanopsis sclerophylla)幼苗为研究对象,通过MSR-2420红外辐射增温装置和人工施氮(对照、质量分数为0.125%和0.25%NH4NO3溶液),设置出不同的增温和施氮梯度,研究增温和施氮对丝栗栲和苦槠幼苗生长状况的影响。结果表明:MSR-2420红外辐射增温装置处理引起了小气候环境的明显改变。随着在设定环境下生长时间的增加,丝栗栲和苦槠幼苗单株的地径和苗高均显著增加(P<0.01)。同一测量时间、同一处理条件下,苦槠幼苗的地径和苗高均显著高于丝栗栲(P<0.01)。与对照相比,增温和施氮均明显提高了丝栗栲和苦槠幼苗的生物量,但其地上生物量与地下生物量的比值未发生显著变化。Taking Castanopsis fargesii and Castanopsis sclerophylla seedings as the study target, the domi- red radiation warming devices and artificial nitrogen fertilizer （control,0. 125% NH4NO3 solution and 0.25% NH4NO3 solution）, a sequential interaction of air temperature warming and soil nitrogen application was setup. The effects of air temperature warming and soil nitrogen applicatibn to the growth of Castanopsis fargesii and Castanopsis sclerophylla seedings are illustrated in this paper. The results showed that： MSR -2420 infra- red radiation warming device treatment caused a Significant change of microclimate environment. With the in- crease of growth time under the artificial control conditions, the seeding height and ground diameter of Castan- time and other conditions, the seedling height and ground diameter of Castanopsis sclerophylla were significant- ly higher than that of Castanopsis fargesii （P 〈 0.01 ）. Compared with the control, warming and nitrogen ferti- lization significantly improved the biomass of Castanopsis sclerophylla seedlings; however there was no cant change in the ratio of the aboveground biomass to the underground biomass. signifi

关 键 词：丝栗栲 苦槠 生长状况 生物量 

分 类 号：S792.17[农业科学—林木遗传育种]