首页 | 本学科首页   官方微博 | 高级检索  
     


The influence of aggregate size and drannage potential on germination of barley seeds in flooded soil
Authors:R. S. Shiel  S. Holburn  M. A. Adey
Affiliation:(1) Department of Soil Science, The University, NE1 7RU Newcastle upon Tyne, UK
Abstract:
Emergence and growth of barley was severely decreased by short periods (less than 24 hours) of pre-emergence waterlogging at 20°C. The extent of damage depended on a combination of duration of waterlogging, soil water potential and aggregate size. Potentials of less than—4kPa prevented loss of plants developing in aggregates of less than 2 mm diameter after a transitory period of waterlogging although some shoot and root damage occurred. By comparison seeds growing in soil consisting of aggregates greater than 2 mm in diameter were not damaged by transitory waterlogging even when drainage only occurred at−0.8kPa. The severity of damage increased with the period of waterlogging. A criterion obtained as the product of mean size grade and water potential gave a single value (−4NM−1) below which emergence was satisfactory. Waterlogging halfway through germination gave more severe damage than near sowing date or near emergence.
Keywords:aggregate size  barley germination  waterlogging  soil water potential  tilth
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号