| Effects of sprinkling irrigation with brackish and fresh water mixing on yield of wheat and maize and movement of soil water and salt |
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| DOI：10.7606/j.issn.1000-7601.2021.06.10 |
| Key Words: brackish and fresh water mixing sprinkling irrigation winter wheat summer maize soil salinity yield |
| Author Name | Affiliation | | JIAO Yanping | Hebei Academy of Water Resources,Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | WANG Hanbo | Hebei Academy of Water Resources,Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | ZHANG Shuantang | Hebei Academy of Water Resources,Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | Chen Wenbin | Hebei Academy of Water Resources,Shijiazhuang, Hebei 050051, China
Hebei Technology Innovation Center of Agricultural Water Saving, Shijiazhuang, Hebei 050051, China | | ZHENG Chenghai | National Semiarid Agricultural Engineering Technology Research Center, Shijiazhuang, Hebei 050050, China |
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| Abstract: |
| The purpose of this study was toexplore effects of sprinkling irrigation by brackish and fresh water mixing with different salinity on growth and yield of winter wheat and summer maize. By monitoring the distribution of soil water and salt, a suitable salinity of brackish water irrigation method was selected. A field experiment was conducted in the low plain area of Hebei Province. Four irrigation treatments (border irrigation with fresh water, sprinklers with fresh water, 2 g·L-1 and 3 g·L-1brackish water) were designed. Data collected were used to analyze effects of sprinkling irrigation with brackish and fresh water mixing on wheat and maize growth as well as soil water and salt movement. The results showed that, after two years of irrigation,compared with fresh water sprinkling, at the time of wheat harvest, the salt content of root layer soil (0~40 cm) treated by 2 g·L-1and 3 g·L-1 salinity sprinkler irrigation increased by 17.8% and 42.7%, respectively, and the salt content of 0~100 cm soil increased by 32.9% and 74.3%, respectively. After maize was harvested, the salt content of root layer soil increased by 40.3% and 86.9%, respectively, and the salt content of 0~100 cm soil increased by 39.0% and 88.9% respectively. The salt accumulation under 3 g·L-1 salinity sprinkling treatment exceeded the salt threshold of wheat and maize growth. Compared with fresh water sprinkling,the yield of winter wheat treated with 2 g·L-1 salinity was reduced by 9.8%~11.4% (no significant difference), but the yield of winter wheat treated with 3 g·L-1 salinity was significantly reduced by 25.0%~25.9% (P<0.05). The ear weight per plant and yield of summer maize treated with 2 g·L-1 salinity were reduced by 5.1%~10.4% and 6.6%~10.5% respectively (no significant difference), but the 100-grain weight, ear weight per plant and yield of summer maize treated with 3 g·L-1 salinity were significantly decreased by 18.6%~22.4%, 18.2%~25.9% and 14.7%~15.3% (P<0.05), respectively. Sprinkling irrigation with 3 g·L-1 salinity had a significant effect on the yield components of winter wheat and summer maize. Therefore, sprinkling irrigation with no more than 2 g·L-1 mixing of brackish and fresh water should be used for field irrigation of winter wheat and summer maize in this region. |
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