Original scientific paper

https://doi.org/10.17559/TV-20260515003596

Optimization and Effect Analysis of Water-Heat-Air Parameters for Cold-Region Rice Seed Soaking Based on Response Surface Methodology

Shaodong Liu ; 1) College of Civil Engineering and Water Conservancy, Heilongjiang Bayi Agricultural University, Daqing Heilongjiang 163319, China 2) Research Center of Rice Ecological Seedling Raising Device and Mechanization of Planting Process Engineering Technology of Heilongjiang Province, Daqing Heilongjiang 163319, China *
Zhao Han ; College of Civil Engineering and Water Conservancy, Heilongjiang Bayi Agricultural University, Daqing Heilongjiang 163319, China

* Corresponding author.

Abstract

To improve the efficiency of seed soaking and germination in cold regions, while enhancing seedling quality, this study used Suijing 27 as the experimental material; the experimental factors were soaking water temperature (A), aeration interval (B), and soaking duration (C). The experiment employed a quadratic orthogonal rotated combination design. Following the experiment, regression models were established for the relationship between rice seedling germination rate, average sprout length, and average root length and the water, temperature, and air environmental variables during the seed soaking period, and the seed soaking process parameters were optimized. The experimental results indicate that soaking water temperature, aeration interval, and soaking duration all have a highly significant effect on germination rate, with the order of effect strength being A > B > C. There is a highly significant interaction between soaking water temperature and soaking duration, and a significant interaction between aeration interval and soaking duration. The aeration interval had no significant effect on average sprout length, while the soaking duration had a highly significant effect on average sprout length that was stronger than that of the soaking water temperature, with the order of effect strength being C > A > B; there were no significant interactions among these factors. The soaking water temperature, aeration interval, and soaking duration all had significant effects on average root length, with the order of effect strength being C > B > A; there was a highly significant interaction between the aeration interval and the soaking duration. Based on the specifications for seedling sprout and root length required by cold-region rice production standards, the optimized optimal process parameters were determined to be a soaking water temperature of 31 °C, continuous aeration (0-hour aeration interval), and a soaking duration of 41 hours. Under these conditions, the germination rate of Suijing 27 reached 90.08%, with an average sprout length of 1.86 mm and an average root length of 1.89 mm, meeting the production requirements for mechanized sowing of cold-region rice.

Keywords

cold-region rice; increased oxygen through aeration; parameter optimization; response surface methodology; soak seeds to promote germination; water-heat-gas coupling

Hrčak ID:

353088

URI

https://hrcak.srce.hr/353088

Publication date:

7.11.2026.

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