| 莫诒宣 1, 2#, 刘昱彤 1#, 李巳夫 1, 彭亚军 1, 唐 涛 1*, 刘都才 1*.稗对移栽和抛秧晚稻生长发育和产量性状的影响[J].植物保护,2026,52(4):255-262. |
| 稗对移栽和抛秧晚稻生长发育和产量性状的影响 |
| Effects of barnyardgrass (Echinochloa crus-galli) on the growth, development and yield-related traits of transplanted and thrown late rice |
| 投稿时间：2025-08-07 修订日期：2025-10-01 |
| DOI：10.16688/j.zwbh.2025407 |
| 中文关键词: 稗 栽培方式 曲线拟合 生长发育 产量性状 |
| 英文关键词:Echinochloa crus-galli cultivation method curve fitting growth and development yield-related traits |
| 基金项目:国家重点研发计划(2023YFD1401100) |
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| 中文摘要: |
| 稗属Echinochloa spp.杂草是湖南省双季晚稻田的主要恶性杂草, 其种类多、危害大、抗性强且防控难, 对水稻生产构成严重威胁。为明确稗Echinochloa crus-galli对水稻生长发育和产量性状的影响, 采用人工构建稗种群和模型拟合的方法, 研究了不同密度(0、1、5、15、30、60、120 株/m^2)稗下移栽晚稻和抛秧晚稻各产量性状的变化规律。结果表明, 移栽晚稻和抛秧晚稻‘堆丰优6377’在稗的竞争干扰下, 植株的株高、分蘖数、地上部干物质积累量、穗长、有效穗数、每穗实粒数、结实率、千粒重及实际产量均随稗密度的增加而逐渐降低。对数模型y=10.584lnx-2.665和二次曲线函数y=-0.003x 2+0.827x+11.425分别能最好地拟合移栽晚稻和抛秧晚稻实际产量损失率与稗密度间关系。 |
| 英文摘要: |
| Echinochloa spp. are the major troublesome weeds in double-cropping late rice fields in Hunan province. They are characterized by multiple species, severe damage, strong herbicide resistance and difficulty in prevention and control, posing a serious threat to rice production. To clarify the effects of barnyardgrass (Echinochloa crus-galli) on the growth, development and yield-related traits of paddy rice, an artificial establishment of E.crus-galli combined with model fitting was conducted to investigate the changes in yield-related traits of transplanted and thrown late rice under different densities of E.crus-galli (0, 1, 5, 15, 30, 60, 120 plants/m 2). The results showed that under the competitive interference of E.crus-galli, plant height, tiller numbers, aboveground dry matter accumulation, panicle length, effective panicle numbers, filled grains per panicle, seed-setting rate, 1 000-grain weight and actual yield of the late rice cultivar ‘Duifengyou 6377’ in both transplanted and thrown rice gradually decreased with increasing barnyardgrass density. The logarithmic regression model y=10.584lnx-2.665 (P<0.001) and the quadratic regression model y=-0.003x 2+0.827x+11.425 (P<0.001) were the best fit for describing the relationship between actual yield loss rate and barnyardgrass density in transplanted late rice and thrown late rice, respectively. |
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