Chunyou 84 is an indica-japonica hybrid rice combination developed from Chunjiang 16A, a late japonica CMS line with early anthesis time, and C84, an indi-ca-japonica intermediate type restorer line with wide compatib...Chunyou 84 is an indica-japonica hybrid rice combination developed from Chunjiang 16A, a late japonica CMS line with early anthesis time, and C84, an indi-ca-japonica intermediate type restorer line with wide compatibility. It has the charac-teristics of high yield potential, high seed production, excel ent agronomic characters, good resistance and wide adaptability. It was registered and released by Zhejiang Provincial Crop Variety Appraisal Committee in March, 2013. The breeding proce-dure, characteristics, major techniques of cultivation and seed production of Chunyou 84 were introduced in this paper.展开更多
以杂交粳稻春优84为材料,通过播种期(5月10日、5月20日、5月30日、6月9日、6月19日)、秧龄(20,25,30,35,40 d)和氮肥(150.0,187.5,225.0,262.5,300.0 kg N·hm^-25个氮素水平)多因素试验,研究不同播种期、移栽秧龄和氮素施用...以杂交粳稻春优84为材料,通过播种期(5月10日、5月20日、5月30日、6月9日、6月19日)、秧龄(20,25,30,35,40 d)和氮肥(150.0,187.5,225.0,262.5,300.0 kg N·hm^-25个氮素水平)多因素试验,研究不同播种期、移栽秧龄和氮素施用量对春优84各生育期干物质累积、产量及产量构成因子的影响。结果表明:春优84随着播种期的推迟生育进程相应推迟,生育期缩短,在5月10日播期产量最高,随着播种期推迟减产幅度加大;春优84在20 d秧龄产量最高,秧龄超过25 d产量显著下降,秧龄增加会降低有效穗数和每穗粒数,导致产量降低。春优84的秧龄弹性较大,可作为连作晚稻种植的潜力;增施氮肥有利于提高春优84成熟期干物质在穗部的分配比例,施氮量过多导致穗部干物质分配比例下降,产量降低。春优84在金华地区作单季晚稻种植的适宜播种期为5月10—20日,适期早播有利于产量提高,移栽秧龄以20~25 d为宜,超过25 d产量减产明显,最佳施氮量为262.5 kg N·hm^-2,过量施氮容易导致减产。展开更多
基金Supported by Zhejiang 0406 Projectthe Project of "The Breeding and Experimental Demonstration of Chinese Super Rice" by Ministry of Agriculture+3 种基金the Project of Fundamental Research Funds of China National Rice Research Institute(2012RG001-2)National Agricultural Science and Technology Transformation Fund Project(2013GB23260592)Zhejiang Agricultural Science and Technology Cooperation Projects of "Three Agricultural Issues and Six Parties"Zhejiang Agricultural Project of Public Welfare Technology Research(2012C22023)~~
文摘Chunyou 84 is an indica-japonica hybrid rice combination developed from Chunjiang 16A, a late japonica CMS line with early anthesis time, and C84, an indi-ca-japonica intermediate type restorer line with wide compatibility. It has the charac-teristics of high yield potential, high seed production, excel ent agronomic characters, good resistance and wide adaptability. It was registered and released by Zhejiang Provincial Crop Variety Appraisal Committee in March, 2013. The breeding proce-dure, characteristics, major techniques of cultivation and seed production of Chunyou 84 were introduced in this paper.
文摘以杂交粳稻春优84为材料,通过播种期(5月10日、5月20日、5月30日、6月9日、6月19日)、秧龄(20,25,30,35,40 d)和氮肥(150.0,187.5,225.0,262.5,300.0 kg N·hm^-25个氮素水平)多因素试验,研究不同播种期、移栽秧龄和氮素施用量对春优84各生育期干物质累积、产量及产量构成因子的影响。结果表明:春优84随着播种期的推迟生育进程相应推迟,生育期缩短,在5月10日播期产量最高,随着播种期推迟减产幅度加大;春优84在20 d秧龄产量最高,秧龄超过25 d产量显著下降,秧龄增加会降低有效穗数和每穗粒数,导致产量降低。春优84的秧龄弹性较大,可作为连作晚稻种植的潜力;增施氮肥有利于提高春优84成熟期干物质在穗部的分配比例,施氮量过多导致穗部干物质分配比例下降,产量降低。春优84在金华地区作单季晚稻种植的适宜播种期为5月10—20日,适期早播有利于产量提高,移栽秧龄以20~25 d为宜,超过25 d产量减产明显,最佳施氮量为262.5 kg N·hm^-2,过量施氮容易导致减产。