| Effects of PAM with different application methods on soil moisture, soil temperature and production of spring wheat |
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| DOI：10.7606/j.issn.1000-7601.2013.01.26 |
| Key Words: polyacrylamide (PAM) application methods soil moisture soil temper
ature spring wheat |
| Author Name | Affiliation | | ZHANG Rui | Forestry College, Northwest A&F University, Yangling, Shaanxi 712100, China | | GENG Guijun | Institute of Northwest
Exploration and Design, China Hydropower Engineering Consulting Group Company, Xi’an, Shaanxi 710065, China | | YU Jian | Institute of Inner Mongolia Hydraulic Research, Huhhot, Inner Mongolia 010020
, China | | BAI Gangshuan | Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling,
Shaanxi 712100, China
Institute of Soil and Water Conservation, Northwest A&
F University, Yangling, Shaanxi 712100, Chin |
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| Abstract: |
| In order to probe the best application method of polyacrylamide (PAM)
in spring wheat production, a field
experiment was carried out in Hetao irrigation district in Inner Mongolia in 201
0, to investigate the effects of PAM being
applied with three methods of furrowing, mixing and broadcasting on the soil moi
sture, soil temperature and growth of spring
wheat, with no PAM as control. The results indicated that all application method
s of PAM increased the soil moisture content,
which was especially remarkable during florescence when the irrigation was absen
t, and the effect of broadcasting was
stronger than that of furrowing and mixing. All application methods of PAM reduc
ed the maximum temperature, increased
the minimum temperature, decreased the diurnal temperature difference, and reduc
ed the daily mean temperature of soil,
among which broadcasting mainly affected the earth’s surface temperature, while
furrowing mainly affected the soil
temperature at 10 cm depth. The PAM treatments increased both the root biomass a
nd total biomass, and promoted the
distribution of crop roots in deep soil. Compared with the control, the yields o
f furrowing, mixing and broadcasting
application were increased by 9.11%, 3.94% and 28.82%, respectively. All the PAM
treatments improved the water use
efficiency, water production rate and irrigation production rate, in which the e
ffect of broadcasting was the largest, and that
of furrowing was the lowest. In Hetao irrigation district, it is the optimum met
hod to apply PAM at the sowing stage of spring
wheat by broadcasting. |
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