引用格式：，等.不同移栽密度和栽插苗数对早稻稻米品质的影响[J].湖南农业科学，2025（6）：16-20，25.DOI：10.16498/j.cnki.hnnykx.2025.006.003

中图分类号：S359.1 文献标识码：A 文章编号：1006-060X（2025）06-0016-05

Effects of Transplanting Density and Number of Transplanted Seedlings per Hill on Rice Quality of Early-Season Rice

YI Shi-wu1，XIONG Yi’，LIU Yi-han²，TANG Jin-ping²，YANG Qing-fei²， WU Jian-jun²，CHEN Hao²，WANG Yue¹

（1.ColegeofoHulUesits;curedulio County，Yueyang 414200，）

Abstract：This studyaims toexplore theefectsof transplantingdensityandnumberof transplantedseedlings perhillon therice quality ofearly-seasonrice.Therice variety'Xiangzaoxian 32' was planted，andasplit-plotdesign wasadopted.The numberof transplantedsdisphllwsakasiplotihelsof1（ingl），2（4dip）d7 seedlings per hil）.The transplanting density was taken as the split-plot， with three levels of M1 （ 25cm×10cm ，M2 25cm×15cm ）， and M3 （ 25cm×20cm ）. The results showed that transplanting density and number of transplanted seedlings per hillhad significant effects on rice quality.The R2M2 treatment showed the brown ricerate 1.41% higher than the R1M3 treatment， the milled rice rate （204号 1.89% and 2.85% higher than the R1Ml and R1M3 treatments，the head rice rate 6.97% and 7.34% higher than the R2Ml and R3M1 treatments， and the aspect ratio 1.01% and 1.52% lower than R1M1 and R1M3 treatments，respectively， all with significant differences. Inaddition，the amylose content of the R2M2 treatment significantly increased by 17.24% compared with that of the R2M1 treatment. Insummary，theR2M2treatmentcanicreasetheamylosecontentwhileimprovingtheprocesingquality（rownicerate，iledice rate，and head rice rate）and appearance quality （chalkiness，chalky grain percentage，and aspect ratio）.

Key Words：rice; transplanting density; number of transplanted seedlings per hil; rice quality

水稻（OryzasativaL.）是重要的粮食作物，在实现全球粮食安全方面发挥着重要作用。近年来，随着人民物质生活水平的提高，稻米品质逐渐受到人们的重视[1，在确保水稻高产的同时提升稻米品质是当前农业生产面临的重要挑战。而稻米品质的评价指标主要包括加工品质、外观品质、营养品质以及食味品质。

移栽密度是众多农艺措施中对水稻产量和品质形成影响较为重要的因子，合适的移栽密度能让水稻更好地生长发育，增加水稻产量以及改善稻米品质[。王成瑷等[3认为，移栽密度主要影响稻米外观品质中的垩白粒率及营养品质中的蛋白质与直链淀粉含量，过高的移栽密度会使蛋白质、直链淀粉含量及垩白率升高，稻米的食味品质和外观品质都会下降。黄晓蓉等研究发现，低密度处理的稻米垩白度和垩白粒率低于高密度处理，即随着栽培密度的增加，稻米的外观品质变差。蒋振华等[5]指出，增大移栽密度会导致水稻的垩白度和垩白粒率降低。然而，程效义等则提出了相反的观点，认为移栽密度并不会对水稻的垩白度和垩白粒率产生显著影响。此外，在适宜的移栽密度范围内，适当减少每穴栽插苗数，有助于改善水稻稻米品质[]。但是，栽插苗数对稻米品质的影响程度存在差异，即外观品质受影响最为显著，其次是胶稠度和直链淀粉含量，加工品质受影响最小。……