CAJ | 학술논문

[目的]研究控蘖剂对超级早稻品种金优458生长发育及产量形成的影响。[方法]试验设喷施控蘖剂和喷施清水两种处理,研究了控蘖剂对产量及其构成因素,稻株形态,孕穗期田间小气候及群体质量特征的影响。[结果]喷施控蘖剂处理能显著减少无效和低效分蘖的发生,增加高峰苗期分蘖构成中高效分蘖（单茎4叶及以上分蘖）所占比重。喷施控蘖剂处理的穗长、穗粒数、穗着粒密度、二次枝粳数及着生其上的二次颖花数及结实率均显著高于未喷施控蘖剂的对照。同时喷施控蘖剂能增加株高,中后期群体生物量和叶面积指数,提高孕穗期上三叶叶温和群体的透光性,增加叶片SPAD值,从而增强光合作用能力,但也表现出稻株节间长度增加,茎秆粗度减小等特点。[结论]喷控蘖剂措施处理最终表现为茎蘖成穗率、有效穗数、穗粒数、结实率和千粒重协调上升而增加产量。
[목적]연구공얼제대초급조도품충금우458생장발육급산량형성적영향。[방법]시험설분시공얼제화분시청수량충처리,연구료공얼제대산량급기구성인소,도주형태,잉수기전간소기후급군체질량특정적영향。[결과]분시공얼제처리능현저감소무효화저효분얼적발생,증가고봉묘기분얼구성중고효분얼（단경4협급이상분얼）소점비중。분시공얼제처리적수장、수립수、수착립밀도、이차지갱수급착생기상적이차영화수급결실솔균현저고우미분시공얼제적대조。동시분시공얼제능증가주고,중후기군체생물량화협면적지수,제고잉수기상삼협협온화군체적투광성,증가협편SPAD치,종이증강광합작용능력,단야표현출도주절간장도증가,경간조도감소등특점。[결론]분공얼제조시처리최종표현위경얼성수솔、유효수수、수립수、결실솔화천립중협조상승이증가산량。
[Objective]The paper was to study the effect of tiller-inhibitor on the growth and yield formation of super early rice Jinyou 458.[Method] Two treatments including spraying tiller-inhibitor（TI） and spraying water（CK） at the SN-n stage were set in the test,the effect of tiller-inhibitor on yield and its components,leaf and plant morphology,field microclimate at booting stage and quality characteristics of rice population were studied.[Result] Spraying tiller-inhibitor could effectively reduce the occurrence of invalid and inefficient tillers,increase the proportion of high effective tillers（tiller with 4 or more leaves） in tiller composition at the maximal tiller stage.The panicle length,spikelets per panicle,spikelets density,number of secondary branches and the secondary spikelets,seed setting rate of rice plant sprayed with tiller-inhibitor were significantly higher than CK.Meanwhile,spraying tiller-inhibitor could increase plant height,biomass weight and leaf area index of rice population during middle and late stages of rice growing,improve the leaf temperature of top three leaves and the light transmittance of rice population at the booting stage,increase the leaf SPAD value,thus enhance photosynthetic capacity of rice plants.It also showed the characteristics of elongating the internode of rice plant and decreasing the stem thickness,etc.[Conclusion] The panicle-bearing rate of stems and tillers,effective panicles,spikelets per panicle,seed setting rate and 1 000-grain weight had coordinately increased after spraying tiller-inhibitor,thus increased the yield.