有序机抛下抛栽密度对Y两优911作再生稻栽培生长和产量形成的影响  

Effects of Density on Growth and Yield Formation of Y Lianyou 911 as Ratoon Rice Under Ordered Mechanical Throwing Cultivation

作　　者：郑志刚 向丽 罗友谊 刘功义 徐彩 奚伟 王慰亲 郑华斌[1] 唐启源[1] ZHENG Zhi-gang;XIANG Li;LUO You-yi;LIU Gong-yi;XU Cai;XI Wei;WANG Wei-qin;ZHENG Hua-bin;TANG Qi-yuan(College of Agronomy,Hunan Agricultural University,Changsha,Hunan 410128,China;Zoomlion Intelligent Agriculture Co.,Ltd.,Wuhu,Anhui 241000,China)

机构地区：[1]湖南农业大学农学院,湖南长沙4101282 [2]中联智慧农业股份有限公司,安徽芜湖241000

出　　处：《杂交水稻》2022年第6期89-96,共8页Hybrid Rice

基　　金：国家现代农业产业技术体系建设专项(CARS-01-27);智慧芜湖大米专家系统及农业管家的研发与应用(2020dx09);中联智慧农业数字标准化水稻种植指南研发与应用。

摘　　要：为探究有序机抛下密度对Y两优911作再生稻生长和产量形成的影响,大田试验采用随机区组设计,设5个抛栽密度水平(D1,18.2万穴/hm^(2);D2,22.2万穴/hm^(2);D3,25.0万穴/hm^(2);D4,30.8万穴/hm^(2);D5,33.3万穴/hm^(2))。结果表明,随密度增加,产量先增后减。D2、D3和D4处理的头季和周年产量分别比D1处理显著增产12.52%~15.84%、11.78%~14.70%,比D5处理增产5.38%~8.49%、3.03%~5.72%;D2、D3、D4和D5处理的再生季产量比D1处理显著增产9.94%~14.42%。与D1处理相比,D2、D3、D4处理的头季茎蘖数、再生季发苗数和各主要生育时期的干物质积累量较高;与D5处理相比,D2、D3和D4处理的头季分蘖率和分蘖成穗率较高,头季抽穗后叶绿素含量衰减率显著较低,头季生育后期干物质积累能力较强。综上,有序机抛下再生稻Y两优911适宜的抛栽密度范围为22.2万~30.8万穴/hm^(2)。To investigate the effects of density on growth and yield formation of Y Liangyou 911 as ratoon rice under ordered mechanical throwing cultivation,a field experiment of five throwing density treatments (D1,18.2×10~4 hills/hm^(2);D2,22.2×10~4 hills/hm^(2);D3,25.0×10~4 hills/hm^(2);D4,30.8×10~4 hills/hm^(2);D5,33.3×10~4 hills/hm^(2)) was conducted with the randomized block design.The results showed that the grain yield increased firstly and then decreased with the increase of density.Compared with D1 and D5,the main crop and annual yield of D2,D3 and D4 increased by 12.52%~15.84%,11.78%~14.70%and 5.38%~8.49%,3.03%~5.72%,respectively.Compared with D1,the grain yield of D2,D3,D4 and D5 in ratoon season significantly increased by 9.94%~14.42%.Compared with D1,D2,D3 and D4 were higher in the tiller number of both main and ratoon crop and the aboveground biomass in all main growing stages.Compared with D5,D2,D3 and D4 significantly reduced the falling rate of chlorophyll content in flag leaf of main crop after heading,increased the tillering rate and the rate of productive tillers of main crop and the dry matter accumulation in the later growth stages of main crop.In conclusion,the suitable density of Y Liangyou 911 as ratoon rice is 22.2×10~4~30.8×10~4 hills/hm^(2) under ordered mechanical throwing cultivation.

关 键 词：有序机抛 Y两优911 密度 再生稻 产量 

分 类 号：S511.04[农业科学—作物学] S318