| Effects of different irrigation conditions on soil physicochemical properties and rice yield |
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| DOI：10.7606/j.issn.1000-7601.2023.01.15 |
| Key Words: rice dry crop mulch drip irrigation soil physical and chemical properties yield |
| Author Name | Affiliation | | HE Jinyu | School of Civil and Hydraulic Engineering, Ningxia University，Yinchuan, Ningxia 750021, China；Engineering Technology Research Center of Water\|Saving and Water Resource Regulation in Ningxia, Yinchuan, Ningxia 750021, China；Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions, Ministry of Education, Yinchuan, Ningxia 750021, China | | LIU Feiyang | School of Civil and Hydraulic Engineering, Ningxia University，Yinchuan, Ningxia 750021, China | | MA Bo | School of Civil and Hydraulic Engineering, Ningxia University，Yinchuan, Ningxia 750021, China；Engineering Technology Research Center of Water\|Saving and Water Resource Regulation in Ningxia, Yinchuan, Ningxia 750021, China；Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions, Ministry of Education, Yinchuan, Ningxia 750021, China | | WANG Bin | School of Civil and Hydraulic Engineering, Ningxia University，Yinchuan, Ningxia 750021, China；Engineering Technology Research Center of Water\|Saving and Water Resource Regulation in Ningxia, Yinchuan, Ningxia 750021, China；Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions, Ministry of Education, Yinchuan, Ningxia 750021, China |
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| Abstract: |
| To explore suitable irrigation saving methods in rice production, a large field experiment was conducted at Ningxia Nuanquan Farm from 2017-2019.A three\|factor comparative design with three different rice irrigation saving methods (moisture retaining dry direct seeding MDDS, post\|sowing top water dry direct seeding IDFS and mulching drip irrigation dry crop FMDI) was used in this study.The effects of different irrigation saving methods on soil physicochemical properties and yield of rice were investigated. The results showed that: (1) FMDI significantly increased the daily average ground temperature in 0~10 cm during tillering stage by 1.7℃ on average in 3 years（P<0.05）. (2) FMDI had obvious water saving effect,still maintaining high soil water content under irrigation level of 80% field water holding capacity（20.1%、19.9% and 20.3% respectively in three years）. (3) The soil compaction of MDDS and IDFS are 1.74 and 1.77 times higher than FMDI respectivley. (4) There was a significant increase in soil organic matter, total nitrogen, total phosphorus and total potassium in the FMDI treatment for 3 consecutive years compared to the other two tillage treatments. (5) There was a significant yield increase in the FMDI treatment, which had the highest 3-year economic yield and harvest index, while the 3-year FMDI water use efficiency increase was 54.0%, 60.0% and 56.0%, respectively. Therefore, the mulching drip irrigation dry crop (FMDI) wasthe most suitable soil tillage cover measurefor this area's rice productionin terms of water storage and moisture conservation, temperature increase and stabilization, land fertilization and high yield efficiency. |
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