不同播种密度和秧龄对杂交中籼稻新两优6号群体数量及产量的影响  

Effects of Sowing Density and Seedling Age on Yield Formation and the Number of Groups in Hybrid Medium Indica Rice " Xin Liangyou 6 "

作　　者：高军[1] 黄义德[1] 陈金节 王合勤 李胜群 陈景道 

机构地区：[1]安徽农业大学农学院,合肥230036 [2]安徽荃银种业有限公司,合肥230000 [3]安徽省凤台县水稻原种场,凤台232100

出　　处：《中国农学通报》2007年第9期231-236,共6页Chinese Agricultural Science Bulletin

基　　金：国家粮食丰产科技工程"安徽水稻丰产高效技术集成研究与示范"项目(2004BA520A21)

摘　　要：以新两优6号为材料,通过对常规湿润育秧条件下不同播种密度和不同秧龄期栽插,以及长秧龄条件下不同基本苗数和不同育秧方式的大田群体数量及产量表现的研究,为安徽省单季稻产区生产提供技术上的支持。结果表明,新两优6号在湿润育秧条件下,秧龄不宜超过40d,45d及更长秧龄的显著减产,随秧龄延长而减产幅度加大;稀播的减产幅度略小,减产的原因主要是秧龄。随着秧龄的延长,群体总茎蘖数、LAI、单位面积穗数、每穗总粒数和结实率等群体数量递减,而茎蘖成穗率相差不大。长秧龄移栽条件下,增加栽插基本苗数,或采用肥床旱育秧培育长龄多蘖壮秧,是获得理想产量的重要措施。In order to provide technical support for Anhui provincial single cropping rice production, the effects of different sowing density and seedling age on yield formation and the number of population under water-raised seedling conditions were researched by using “Xinliangyou 6”. At the same time, the effects of different numbers of basic seedlings and methods of nurturing the seedlings on yield formation and the number of population are researched under the same long seedling age conditions. The results show that seedling age should not exceed 40 days, and 45 days or longer seedling age will result in yield reduction under water-raised seedling conditions. With the seedling age extended, the reduction range will increase; compared with normal sowing density, the reduction is mainly due to seedling age under sparsely seeding conditions. With the extension of seedling age, the population total tillers, LAI, the number of the spike per hm2, the number of grains per spike and seed-setting rate decrease while the difference of population tillers PTP＇s changes little. Under the long seedling age conditions, by means of increasing the number of basic seedlings or using fertilized dry land bed way to nurture long age-tiller strong seedlings is an impor- tant way to get ideal yield.

关 键 词：播种密度 秧龄 基本苗 群体数量 产量 

分 类 号：S511.32[农业科学—作物学]