播期对镉低积累品种臻两优8612生育期、产量及米质的影响  

Effects of Sowing Dates on the Growth Period,Yield,and Grain Quality of the Rice Cultivar'Zhenliangyou 8612'with Low Cadmium Accumulation

作　　者：黄国龙 粟文俊 王淋玉 殷彬轩 陈献忠 HUANG Guo-long;SU Wen-jun;WANG Lin-yu;YIN Bin-xuan;CHEN Xian-zhong(Zhuzhou Institute of Agricultural Sciences,Zhuzhou 412007,PRC)

机构地区：[1]株洲市农业科学研究所,湖南株洲412007

出　　处：《湖南农业科学》2024年第11期31-35,共5页Hunan Agricultural Sciences

基　　金：国家水稻产业技术体系项目(CARS-01-21);湖南省水稻产业技术体系项目(HARS-RICE)。

摘　　要：采用分期播种,比较不同播期对镉(Cd)低积累品种臻两优8612生育期、产量及其构成因子、稻米品质和低积Cd特性的影响。结果表明:随播期推迟,播种至始穗历期缩短,始穗至成熟历期延长,全生育期缩短;单产先增后减,以5月27日播期的最高,其次是5月17日的,二者差异不显著;有效穗、结实率处理间差异极显著,穗平总粒数、千粒重处理间差异显著;糙米率、精米率和整精米率随灌浆结实期温度降低先升后降,垩白粒率和垩白度则先降后升,以5月17日和5月27日播期的稻米品质较佳,早播或晚播品质下降;不同播期各生育期外部温光条件的变化对其低积Cd特性无明显影响。在本试验条件下,该品种于4月7日至6月16日之间播种都能正常成熟,在湘东地区作一季晚稻栽培适宜播期为5月17—27日,作再生栽培宜在3月27日前播种。The effects of different sowing dates on the growth period,yield,yield components,grain quality,and low cadmium accumulation characteristic of the rice cultivar'Zhenliangyou 8612'with low cadmium accumulation were compared.The results showed that the delay of the sowing date was accompanied with the shortened period from sowing to initial heading,extended period from initial heading to maturity,and shortened whole growth period.The yield per unit area first increased and then decreased,being the highest when the seeds were sown on May 27 and the second when the seeds were sown on May 17,which had no significant difference between the two.The number of effective panicles and grain setting rate showed very significant differences among different sowing dates,and the number of grains per panicle and thousand-grain weight showed significant differences among different sowing dates.With the decrease in temperature during the grain filling stage,the brown rice rate,milled rice rate,and head rice rate first increased and then decreased,while the chalky rice percentage and chalkiness degree first decreased and then increased.The grain quality was the best when sowing was carried out on May 17 and May 27,while the quality decreased in the case of early or late sowing.Neither different sowing dates nor different light and temperature conditions during different growth stages had significant effect on the low cadmium accumulation characteristic.Under the conditions of this experiment,'Zhenliangyou 8612'could mature normally when it was sown between April 7 and June 16.The suitable sowing time for the cultivation of single-season late rice in eastern Hunan was May 17 to 27,and that for ratooning rice was before March 27.

关 键 词：Cd低积累 播期 产量 米质 臻两优8612 

分 类 号：S511[农业科学—作物学] S352.1