摘要
为探究播量对机械穴直播水稻主要农艺性状及产量的影响,2021年以优质食味稻‘南粳5718’为材料进行试验,设6个播量,分别为60.0、75.0、90.0、105.0、120.0、135.0 kg/hm^(2),分析群体主要农艺性状、产量及其构成因素。结果表明,随着播量的增加,有效穗先增高后降低,在105.0 kg/hm^(2)处理水平达到最高;穗粒数在105.0、120.0 kg/hm^(2)处理水平下表现好;结实率随着播量增加总体呈下降趋势,最高结实率比最低结实率高9.7个百分点;千粒重变化不显著;理论产量与有效穗表现趋势一致,105.0 kg/hm^(2)处理水平产量最高,达12105.3 kg/hm^(2)。单茎生物量、单茎穗重、总生物量以及总穗重均呈现先增后降的趋势,在105.0 kg/hm^(2)处理水平下达到最高水平,利于营养物质的积累和转化;然而,105.0 kg/hm^(2)处理水平下的株高与基部节间较高,要特别注意防倒伏。综合来看,‘南粳5718’机械穴直播播量为105.0 kg/hm^(2)时,综合性状优,产量较高,值得推广。
To explore effects of seeding rate on main agronomic traits and yield of rice under mechanized holedirect-seeding cultivation,‘Nanjing 5718',a high-quality rice variety,was used as the material for the experiment in 2021.There were 6 seeding rates,60.0,75.0,90.0,105.0,120.0,and 135.0 kg/hm^(2),respectively,and the main agronomic traits,yield and yield components of rice population were analyzed.The results showed that the effective panicle number first increased and then decreased with the increase of the seeding rate,and reached the highest level in the 105.0 kg/hm^(2)treatment.Grain number per spike showed good performance at 105.0 kg/hm^(2)and 120.0 kg/hm^(2)treatment levels.The seed setting rate decreased with the increase of the seeding rate,and the highest seed setting rate was 9.7 percentage points higher than the lowest seed setting rate.The change of 1000-grain weight was not significant.The theoretical yield was consistent with the trend of effective panicle performance,and the yield in 105.0 kg/hm^(2)treatment was the highest,reaching 12105.3 kg/hm^(2).Biomass per stem,panicle weight per stem,total biomass and total panicle weight all increased first and then decreased,and reached the highest level in 105.0 kg/hm^(2)treatment,which was conducive to the accumulation and transformation of nutrients.However,plant height and basal internodes were relatively high at 105.0 kg/hm^(2)treatment level,and special attention should be paid to prevent lodging.In a word,when the seeding rate of‘Nanjing 5718'under mechanized hole-direct-seeding cultivation is105.0 kg/hm^(2),the comprehensive trait is excellent and the yield is high.The practice is worth popularizing.
作者
温凯
杨武广
王君
仇景涛
WEN Kai;YANG Wuguang;WANG Jun;QIU Jingtao(Hanjiang District Agricultural Technology Promotion Center,Yangzhou,Jiangsu 225009)
出处
《中国农学通报》
2023年第24期1-5,共5页
Chinese Agricultural Science Bulletin
基金
扬州市现代农业发展专项。
关键词
水稻
机穴播
‘南粳5718’
产量
农艺性状
rice
mechanized hole-direct-seeding
‘Nanjing 5718'
yield
agronomic trait
