| Influence of water and N fertilizer regulation on root growth characteristics of summer maize |
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| DOI：10.7606/j.issn.1000-7601.2013.01.17 |
| Key Words: water N root summer maize correlation |
| Author Name | Affiliation | | DU Hongxia | School of Environmental and Municipal Engineering, Xi’an University of Arch
itecture and Technology, Xi’an 710055, China | | FENG Hao | National Engineering Research Center for Water Saving Irrigation at Yangling,
Yangling, Shaanxi 712100, China | | WU Pute | National Engineering Research Center for Water Saving Irrigation at Yangling,
Yangling, Shaanxi 712100, China | | WANG Baiqun | Institute of Soil and Water Conservation, Chinese Academy of Science and Mini
stry of Water Resources, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Soil column simulated experiment was carried out t
o study the influence of different adjustment measures of water and nitrogen on
root growth characteristics of summer maize, and the correlation between root pa
rameters and grain yield, The results showed that water affected more significan
tly dry weight, activity and surface area of root than N fertilizer. The dry wei
ght of root decreased with the increase of soil depth, especially in 0～10 cm so
il layer. The root length density was large in 0～20 cm soil layer, and it first
ly increased and then decreased with the increase of soil depth. With the increa
sing of N application rate, the root dry weight and root length density decrease
d, while the ratio of root to shoot tended to decrease. N fertilizer could impro
ve the root activity of maize. According to the correlation analysis, the root d
ry weight, root length density, root surface area and root activity were correla
ted very significantly with the grain yield and the dry matter mass above the gr
ound; the ratio of root to shoot was correlated only with the dry matter mass ab
ove the ground; the root surface area was correlated very significantly with the
root activity; the root activity and nitrogen absorption ability played an impo
rtant role in the growth and grain formation of maize, and there was a significa
nt correlation between them. |
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