The Response of Grain Yield and Quality of Water-Saving and Drought-Resistant Rice to Irrigation Regimes

Danping Hou, Yuan Wei, Kun Liu, Jinsong Tan, Qingyu Bi, Guolan Liu, Xinqiao Yu, Junguo Bi () and Lijun Luo
Additional contact information
Danping Hou: Shanghai Agrobiological Gene Center, No. 2901, Beidi Road, Shanghai 201106, China
Yuan Wei: Shanghai Agrobiological Gene Center, No. 2901, Beidi Road, Shanghai 201106, China
Kun Liu: Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Centre for Modern Production Technology of Grain Crops/Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Arable Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou 225009, China
Jinsong Tan: Shanghai Agrobiological Gene Center, No. 2901, Beidi Road, Shanghai 201106, China
Qingyu Bi: Shanghai Agrobiological Gene Center, No. 2901, Beidi Road, Shanghai 201106, China
Guolan Liu: Shanghai Agrobiological Gene Center, No. 2901, Beidi Road, Shanghai 201106, China
Xinqiao Yu: Shanghai Agrobiological Gene Center, No. 2901, Beidi Road, Shanghai 201106, China
Junguo Bi: Shanghai Agrobiological Gene Center, No. 2901, Beidi Road, Shanghai 201106, China
Lijun Luo: Shanghai Agrobiological Gene Center, No. 2901, Beidi Road, Shanghai 201106, China

Agriculture, 2023, vol. 13, issue 2, 1-12

Abstract: Of all the crops, rice is the one that consumes the most water. Rice yields and quality are significantly influenced by irrigation. However, it is still unknown how different irrigation practices would affect the grain yield and quality of water-saving and drought-resistant rice. Hyou 518 (high-yielding rice variety) and Hanyou 73 (water-saving and drought-resistant rice variety) were employed as materials. Three irrigation regimes were set up in the field: conventional flooding irrigation (CF), alternate wetting and moderate soil drying irrigation (AWD), and dry cultivation (D). It was investigated how various irrigation regimes affected the two varieties’ yield and quality. The results revealed the following: 1. D considerably increased water-use efficiency while drastically reducing the yield, compared to CF and AWD. In comparison to other irrigation regimes, the grain yield and water use efficiency of Hanyou 73 enhanced synergistically under AWD treatment. 2. In contrast to CF treatment, AWD and D (especially) treatments decreased perfect rice kernel, total starch content, amylose content, amylopectin content, amylose/amylopectin, gel consistency, and breakdown, but increased green rice kernel, chalky kernel, protein content, and setback. 3. After heading, AWD and D lowered, and D treatment decreased more, the activities of ADP-glucose pyrophosphorylase (AGP), soluble starch synthase (SSS), and starch branching enzyme (SBE). AGP, SSS, and SBE were strongly inversely linked with perfect rice kernel, amylopectin content, gel consistency, and breakdown, but significantly negatively correlated with green rice kernel, chalky kernel, protein content, and setback. The results indicate that with AWD treatment, Hanyou 73 might provide a synergistic boost grain production, water-use efficiency, and quality. D treatment could significantly improve water-use efficiency. Compared with Hyou518, Hanyou 73 could maintain higher AGP, SSS, and SBE activities, head milled rice, perfect rice kernel, amylopectin content, and gel consistency under AWD and D treatment.

Keywords: water-saving and drought-resistant rice; irrigation regime; grain yield; rice quality; key enzymes in sucrose-starch metabolism (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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