| Effects of agronomic measures and water-retaining agent on soil evaporation and water use efficiency of summer maize(Zea mays L. |
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| DOI：10.7606/j.issn.1000-7601.2013.01.19 |
| Key Words: summer maize agronomic measures water-retaining age
nt soil evaporation water use efficiency (WUE) |
| Author Name | Affiliation | | ZHAO Xia | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Institute of Cereal Crops, Henan Academy of Agricultural Sciences / Henan Provincial Key Laboratory of Maize Biology, Zhengzhou 450002, China | | HUANG Ruidong | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China | | LI Chaohai | Henan Provincial Key Laboratory of Food Crops Eco-physiology and Genetic Impro
vement, Zhengzhou 450002, China | | TANG Baojun | Institute of Cereal Crops, Henan Academy of Agricultural Sciences / Henan Provincial Key Laboratory of Maize Biology, Zhengzhou 450002, China | | CHANG Wenfeng | Henan Provincial Key Laboratory of Food Crops Eco-physiology and Genetic Impro
vement, Zhengzhou 450002, China |
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| Abstract: |
| In order to improve the water-saving cultivation
of no-tillage summer maize (
Zea mays L.) in Huang-Huai-Hai area, the effect
s of agronomic measures (including compacting after sowing and straw mulching)
and water-retaining agent on soil evaporation and water use efficiency (WUE
) of maize were explored with field tests in 2011. The results showed that the a
verage soil water content in 0～40 cm during the whole growth period of maize un
der the treatments of A (compacting after sowing), B (compacting after sowing +
straw mulching), C (compacting after sowing + water-retaining agent) and D (comp
acting after sowing + straw mulching + water retaining agent) was increased by
4.78%, 7.96%, 5.50% and 11.08% respectively, compared to that under E (covering
soil after sowing); the soil evaporation was inhibited by 16.33%, 103.78%, 28.37
% and 128.77% respectively; the yield was improved by 9.68%, 17.60%, 11.78%
and 24.01% respectively; and the water use efficiency was raised by 9.64%, 17.55
%, 11.71% and 23.96% respectively. The benefit increased by 1 536.34、2 516.42、
801.74、2 553.10 yuan/hm2. The effects of different treatments were most sig
nificant in the early growth stage of maize. Before jointing stage, the average
soil water content under A, B, C and D was increased by 8.74%, 15.81%, 10.48% an
d 20.28% respectively, and the soil evaporation was inhibited by 17.81%, 164.68%
, 40.35% and 209.43% respectively, compared to that under E. The treatment o
f D, which integrated the effects of compacting after sowing, straw mulching and
water retaining agent, could fully enhance the soil water content and inhibit
soil evaporation. It is recommended that compacting after sowing and straw mulch
ing be practiced in summer maize cultivation in Huang-Huai-Hai area, and water-
retaining agent be added in the conditional place. |
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