| Effects of sewage irrigation on winter wheat quality and Yield |
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| DOI：10.7606/j.issn.1000-7601.2007.05.20 |
| Key Words: sewage irrigation winter wheat quality yield |
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| Abstract: |
| Through the barrel experiment,comprehensive studies were conducted on the changes starch,protein,nitrogen,phosphorus,potassium content in wheat grain under the sewage,1/2 sewage+1/2 clean water,reused water and clean water irrigation condition,as well as the influence of irrigation with different quality of water to wheat yield and content of heavy metal residuals in the grain. The results indicate: When the irrigation quantity is the same,the crude protein content in wheat grain in the irrigations with four different kinds of water is sewage >1/2 sewage +1/2 clean water > reused water > clean water,and the crude protein content in sewage irrigation is obviously higher than in other four;With low irrigation quantity,the wheat yield increases by 12.71%,9.57% and 1.14% in the irrigation with the sewage,the dilution sewage and reused water respectively compared with the control;With high irrigation quantity,the wheat yield increases by 12.22%,5.05% and 2.12% in the irrigation with the sewage,the dilution sewage and reused water respectively compared with the control.Compared with clean water irrigation,there is no significant difference in the content of heavy metal residuals in the wheat grain in irrigations with sewage,the dilution sewage and reused water,with its single and comprehensive pollution indexes both far smaller than 1,which cannot form pollution to wheat grain. |
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