外源喷施不同植物生长调节剂对再生稻产量及干物质积累的影响OA
Effects of Exogenous Spraying of Plant Growth Regulators on Yield and Dry Matter Accumulation of Ratooning Rice
本研究设置 11 种植物生长调节剂处理,分别于头季齐穗期、齐穗后 15 d和收割后 1 d各喷施 1 次,探究其对再生稻产量及干物质积累的影响.结果表明,外源喷施植物生长调节剂对头季和再生季产量均有明显影响.与喷施清水处理(CK)相比,外源喷施 6-苄氨基腺嘌呤(6-BA)(40 mg/L)处理使头季产量和再生季产量分别提高 6.98%、2.06%,周年产量显著提高 4.84%;外源喷施油菜素内酯(BR)(0.5 mg/L)处理使头季产量提高 8.15%,而外源喷施 6-BA(20 mg/L)、BR(0.1 mg/L)、BR(0.5 mg/L)处理均使再生季产量显著降低.外源喷施 6-BA(40 mg/L)和BR(0.5 mg/L)处理提高头季产量,主要归因于其每穗总粒数分别显著增加 8.2%和 8.8%;外源喷施 6-BA(20 mg/L)与BR(0.1 mg/L)处理导致再生季显著减产,则与其结实率分别降低 2.7%和 3.1%、有效穗数分别减少 1.3%和 2.2%相关;外源喷施BR(0.5 mg/L)处理导致再生季显著减产且幅度最大(15.50%),与其有效穗数和每穗总粒数均减少 5.3%且单株再生芽萌发数较少密切相关.进一步分析表明,与CK相比,外源喷施 6-BA(40 mg/L)促进头季增产可能与头季成熟期地上部干物质重(MMS-DW)、花后干物质积累量(∆W)的显著增加,头季成熟期籽粒重(MS-GW)、花后干物质积累量对产量的贡献率(Wr)的增加密切相关.综上所述,于上述 3 个时期各喷施 1 次 40 mg/L 6-BA能有效提高再生稻周年产量,其净效益增加 990 元/hm2.
This study designed 11 treatments of plant growth regulators(PGRs),and examined their effects on ratooning rice yield and dry matter accumulation.In each treatment,the PGR or PGR combination was sprayed once at each of the three stages,namely the full heading stage,15 days after the full heading stage,and 1 day after the harvest of the main season.The results showed that exogenous PGR spraying markedly influenced both the main season yield and ratooning season yield.Compared with the spraying water treatment(CK),the treatment of spraying exogenous 6-benzylaminopurine(6-BA)(40 mg/L)increased the main season yield and ratooning season yield by 6.98%and 2.06%,respectively,and significantly increased the annual yield by 4.84%.The treatment of spraying exogenous brassinosteroid(BR)(0.5 mg/L)increased the main season yield by 8.15%,whereas the treatments of spraying exogenous 6-BA(20 mg/L),BR(0.1 mg/L),and BR(0.5 mg/L)all significantly decreased the ratooning season yield.The yield increases in the main season under 6-BA(40 mg/L)and BR(0.5 mg/L)treatments were mainly attributable to significant increases of 8.2%and 8.8%in the number of total grains per panicle,respectively.Conversely,the significant yield decreases in the ratooning season under 6-BA(20 mg/L)and BR(0.1 mg/L)treatments were associated with decreases of 2.7%and 3.1%in the seed setting rate,as well as decreases of 1.3%and 2.2%in the number of effective panicles,respectively.The treatment of spraying exogenous BR(0.5 mg/L)led to a significant decrease in the ratooning season yield,and the decrease(15.50%)was the greatest,which was closely related to a 5.3%decrease in both the number of effective panicles and number of total grains per panicle,as well as a relatively low number of regenerated bud germinations per plant.Further analysis indicated that compared with CK,the increase in the main season yield under the treatment of 6-BA(40 mg/L)may be closely related to the significant increases in the aboveground dry matter weight at the maturity stage in the main season(MMS-DW)and the dry matter accumulation after flowering(∆W),as well as the increases in the grain weight at the maturity stage in the main season(MS-GW)and the contribution rate of the dry matter accumulation after flowering to the yield(Wr).In conclusion,spraying 6-BA(40 mg/L)once at each of the above three stages can effectively enhance the annual yield of ratooning rice,with a net benefit increase of 990 yuan/hm2.
肖鸿辉;向泽华;郭夏宇;龙继锐;艾治勇;王慰亲;何爱斌
湖南农业大学 农学院,湖南 长沙 410128中方县农业农村局,湖南 怀化 418005湖南杂交水稻研究中心,湖南 长沙 410125湖南杂交水稻研究中心,湖南 长沙 410125湖南农业大学 农学院,湖南 长沙 410128||湖南杂交水稻研究中心,湖南 长沙 410125湖南农业大学 农学院,湖南 长沙 410128湖南农业大学 农学院,湖南 长沙 410128||湖南杂交水稻研究中心,湖南 长沙 410125
农业科技
再生稻产量干物质积累植物生长调节剂6-BA
ratooning riceyielddry matter accumulationplant growth regulators6-BA
《杂交水稻》 2026 (5)
59-67,9
湖南省十大技术攻关项目(2025QK1006)国家自然科学基金(32301934)长沙市科技计划项目(kq2404003)
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