Bioscience Methods 2026, Vol.17, No.1, 23-31 http://bioscipublisher.com/index.php/bm 29 6.3 Implications of the case results for production practice When applied to actual production, this set of results is actually quite valuable. If the harvest is carried out too early, the grains have not fully matured, and usually the quality issues occur first. Such situations should be avoided as much as possible (Zhou et al., 2025). On the contrary, if the grains are harvested when they have just entered the complete ripening stage, the yield and quality can be better balanced. Generally, a moisture content of around 20% is considered appropriate. Of course, one cannot simply delay the harvest indefinitely. If the harvest is postponed, the amount of broken grains increases and the taste deteriorates, which is also not ideal (Teng et al., 2024). In practical operations, the harvest time cannot be uniformly applied by a fixed standard. It needs to be flexibly judged based on the specific characteristics of the variety and the weather conditions of the year. While ensuring the maturity, efforts should be made to avoid the decline in quality caused by either too early or too late harvesting. 7 Harvesting Period Control Suggestions in Production Practice 7.1 Principles for determining the appropriate harvesting time for rice in different ecological regions The harvest times in different ecological zones cannot be uniformly standardized, but the underlying principles are similar. Generally speaking, when most of the rice grains in the fields have turned yellow and the proportion reaches or exceeds 90%, with the moisture content of the grains being around 20%, it is time to consider harvesting (Zhou et al., 2025). However, the specific operation methods depend on local conditions. In the southern rice-growing areas, one should pay more attention to typhoons and continuous rainy weather, and try to avoid these unfavorable conditions; in the northern rice-growing areas, it is more necessary to take preventive measures against the impact of the first frost (Teng et al., 2024). By considering these factors together and combining them with the characteristics of the varieties themselves to determine the harvest time, the rice can be harvested and stored at a relatively suitable state. 7.2 Optimization strategies for harvesting period under mechanized harvesting conditions Under mechanized harvesting conditions, the harvesting time is often determined by the moisture content of the grains. Generally speaking, when the moisture level drops to around 16%, the operation of the combine harvester will proceed more smoothly; if the moisture is too high, there will be significant loss during threshing, and the cost of subsequent drying will also increase (Zhou et al., 2025). However, harvesting cannot be delayed indefinitely. If it is delayed for too long, the grains will become too dry and the fragmentation will be even more severe. During actual operation, one can first harvest the plots with slightly higher moisture content, and then wait for the moisture to naturally decrease in the remaining fields before concentrating on machine harvesting. A compromise can be made between efficiency and quality. At the same time, combined with timely drying, the rice should be quickly reduced to a safe moisture level to better stabilize the harvest quality (Teng et al., 2024). 7.3 The significance of harvest period management for the development of high-quality rice industry In the production of high-quality rice, if the harvest time is properly managed, the results are often immediate. On one hand, the appearance and taste of the rice are more stable, making it easier for consumers to accept (Teng et al., 2024); on the other hand, it can also reduce the yield and quality losses caused by harvesting too early or too late, directly affecting farmers' income (Zhou et al., 2025). This seemingly simple arrangement of the harvest period actually runs through both the quality and efficiency aspects. Managing the harvest period well is an important foundation for promoting the sustained and healthy development of the high-quality rice industry. 8 Conclusion and Outlook When all the results are considered together, it can be observed that the impact of harvest time on the quality of rice is always unavoidable. If the rice is harvested when the grain moisture content is close to 20%, the whole polished rice yield and the taste of the rice are often ideal; if it is harvested earlier or later, the performance in different aspects will be affected. Further comparison also shows that the relationship between moisture content, polished rice yield and taste is not isolated; relying on only one of these factors alone is difficult to determine the most suitable time. These phenomena in the experiment also once again confirm that if the harvest time is chosen appropriately, it is easier to take into account both the processing effect and the eating quality. This provides a relatively intuitive reference idea for how to scientifically arrange the harvest time in production.
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