| Effect of soil layer thickness and genotype on water use of maize after flowering |
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| DOI：10.7606/j.issn.1000-7601.2005.06.09 |
| Key Words: maize genotype soil layer thickness the summer drought stress water use |
| Author Name | Affiliation | | LIU Yong-hong | Sichuan Academy of Agricultural Sciences,Chengdu 610066,China；Key Lab．of Water-saving Agriculture of Sichuan,Province,Chengdu 610066,China | | GAO qiang | Sichuan Academy of Agricultural Sciences,Chengdu 610066,China；Key Lab．of Water-saving Agriculture of Sichuan,Province,Chengdu 610066,China | | LIU Xiao-jun | Key Lab．of Water-saving Agriculture of Sichuan,Province,Chengdu 610066,China |
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| Abstract: |
| The experiment was conducted with pit growing and waterproof shed to evaluate the water use characteristics of maize with different genotypes after blooming period under the condition of 0.4~1.0 m soil depth and summer drought stress.The results showed that the intensity of plant wound flow,relative water capacity(RWC) of leaves and water conserving ability were positively related to the drought-resistance of varieties.The drought-resistance of varieties was C19>C202>C14,and the intensity of wound flow and RWC were added with the increase of soil layer.The milk filling period was shortened 24 d and the intervel between tasselling and silking was prolonged 0~7 d by the treatment of summer drought.Soil layer thickuess and drought-resistance of varieties were positively related to yield and water use efficiency(WUE).Summer drought was effective to increase yield and WUE of C19 with the treatment of 1.0 m soil layer,but the average yield and WUE of maize varieties were the highest with 0.7 m soil layer,which could be used as an index to reconstruct slope farmlands. |
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