生态学杂志2018，Vol.37Issue(8)：2293-2299,7.DOI:10.13292/j.1000-4890.201808.035
超深栽对沙地白榆苗木地上部生长及根系发育的影响
Effects of extra-deep-planting on shoot growth and root development of Ulmus pumila L.seedlings in sandy soils
摘要
Abstract
Two-year-old seedlings of Ulmus pumila L. were planted in sandy soils in the downstream region of Yongding River, to study their shoot growth and root development after extradeep-planting. Long-root and common-root seedlings were planted at 1 m depth of soil (designated as LD and CD, respectively), and common-root seedlings were conventionally planted at 0.3 m depth of soil as control (CC). In the second year after planting, soil water contents were measured from surface to 1 m depth at 0.2 m intervals. Shoot and root growth parameters were measured at the end of the experiment. Results showed that: (1) Soil water contents in deep layer (below 60 cm) were relatively stable and generally higher than the shallow layer (0-40 cm) throughout the growing season. (2) Shoot growth was significantly different among the treatments, with LD being the best and followed by CD and CC. (3) Root development was generally better in LD treatment than the other two treatments. (4) The distribution of roots were different among treatments, whereas whole root and fine roots at different soil layers exhibited similar distribution in each treatment. Roots were intensively developed in 0-0.2 m for the LD, in 0-0.2 and below0.8 m for the CD, and in 0-0.4 m for the CC. No roots were found below 0.8 m in CC treatment.The growth of LD seedlings was better than CD and CC ones. Root distribution pattern of LD corresponded with the water distribution in different soil layers, which may be contributed to the water absorption of seedlings. Therefore, we recommend long-root seedlings with extra-deepplanting for afforestation in arid sandy lands. Considering the low cost of transportation and appropriate root distribution, common-root seedlings can also be recommended for afforestation.关键词
超深栽/根系/沙地造林/白榆/深根苗Key words
extra-deep-planting/root/afforestation in sandy land/Ulmus pumila L./long-root seedling引用本文复制引用
刘春鹏,李向军,安萍,徐振华,刘泽勇,马长明..超深栽对沙地白榆苗木地上部生长及根系发育的影响[J].生态学杂志,2018,37(8):2293-2299,7.基金项目
河北省省级财政林业科技推广示范资金推广项目(201603192) （201603192）
河北省引进国外智力项目(院1516523) （院1516523）
国家林业局948项目(2011-4-56)资助 （2011-4-56）
