| The physiological characteristics of winter wheat roots and its spatial distribution under mulching plastic film condition |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2006.06.01 |
| Key Words: mulching plastic film winter wheat root activity root absorbing area spatial distribution |
|
| Hits: 125 |
| Download times: 95 |
| Abstract: |
| The spatial distribution of the winter wheat roots was studied by determining its root activities and absorbing areas under mulching plastic film condition.The results indicate that the root TTC reductive amounts and intensities were gradually decreased with the increase of distance from the plant stem in a horizontal range of 0～10 cm.From soil surface to 60 cm deep layer,TTC reductive amounts were gradually decreased and so were the root TTC reductive intensities at wheat reviving stages while there was no difference between different soil depths at flowering stage.Changes of total root absorbing area and actively absorbing area had the same trend as those of TTC reductive amounts either in the horizontal or the vertical range.Although plastic mulching did not change the spatial distribution of TTC reductive amounts and intensities,the specific absorbing area and specific actively absorbing area were different with mulching and without mulching at wheat reviving stage.Without mulching,the difference gradually decreased from a distant point of the plants to that close to the plants;with mulching,however,no difference was found in different points of the soil.The specific absorbing area and specific actively absorbing area had no significant difference at different depth from 0 to 60 cm at reviving stage while at flowering stage no difference was also found either in horizontal direction.The root activity was significantly correlated with both total roots absorbing area and actively absorbing area. |