徐淮平原农田防护林带杨树树干液流研究  

Stem Sap Flow of Poplar of Shelter-belt on Farmland in Xu-Huai Plain

作　　者：张金池[1] 黄夏银[2] 鲁小珍[1] 

机构地区：[1]南京林业大学,南京210037 [2]江苏省环境科学研究院,南京210036

出　　处：《中国水土保持科学》2004年第4期21-25,36,共6页Science of Soil and Water Conservation

基　　金："十五"攻关课题"徐淮平原持续高效防护林体系建设模式研究与示范"内容的一部分 (2 0 0 2BA5 16A170 3)

摘　　要：为了揭示农田防护林带对附近农作物产生的胁地机制 ,为农田防护林带的树种配置和制定克服胁地的措施提供理论依据。用热脉冲技术 ,采用ICT 2 0 0 0TE树干液流测定系统 ,研究 8年生NL 80 10 5杨和 11年生I 6 9杨生长盛期树干液流的特点及其与环境因子的关系。结果表明 :1)NL 80 10 5杨和I 6 9杨的单位面积液流通量 ,分别为 0 2 4 4L/ (cm2 ·d)和 0 172L/ (cm2 ·d) ,I 6 9杨的蒸腾耗水强度较NL 80 10 5杨的大 ;2 )NL 80 10 5杨和I 6 9杨液流的日进程 ,均呈低—高—低的变化趋势 ;3)NL 80 10 5杨和I 6 9杨 。In order to open out the threaten field mechanism of shelter-belt on farmland to nearby crop, and offer theoretical base to tree allocation of shelter-belt on farmland and establishment countermeasures to threaten field, the stem sap flow of 8 years' NL80105 Poplar and 11 years' I69 Poplar in growing season were measured by means of ICT2000TE based on thermal pulse technique. The results show that the intensity of sap flow of I69 Poplar was 0.244?L·cm -2·d -1, and that of NL80105 Poplar was 0.172?L·cm -2·d -1. Neglecting the store of moisture tree crown position, it was taken a conclusion that the transpiration intensity of I69 Poplar was relatively higher than that of NL80105 Poplar; the diurnal change of sap flow showed a tendency of low-high-low; at night the sap flow could be obvious increase in I69 Poplar and NL80105 Poplar.

关 键 词：I-69杨 树干液流 农田防护林带 胁地 杨树 耗水强度 热脉冲技术 平原 流通量 机制 

分 类 号：S792.11[农业科学—林木遗传育种] S715[农业科学—林学]