摘要
播量、穴栽插本数、分蘖发生时期、植伤诸因素均显著影响穗型质量,分蘖发生时期最为突出。一次分蘖节位、二次分蘖见蘖期分别与穗总粒数、穗粒重显著相关,随着分蘖节位每升高1个和见蘖期推迟3d,穗总粒数减少7.66~21.71粒;穗粒重降低0.15~0.41g。综合粒、重等因素,穗质量为主茎>第1节位分蘖>秧田期一次分蘖>本田一次分蘖>二次分蘖。提高穗质量除稀播培育多蘖壮秧外,要以促进低节位分蘖和同伸的二次分蘖早生快发为重点。
The panicle quality was affected by the amount of sowing, the number of transplanted seedlings per hill, the injure of transplanting, especially the tillering time. There was a significant correlation between the primary tiller position, secondary tiller stage and spikelets per panicle, the 1 000-grain weight with tiller position one node higher and tillering stage 3 days later, the number of spikelets per panicle decreased by 7.66~21.71, the 1 000-grain weight decreased by 0.15~0.41 g. Based on the comprehensive performance of panicle characters, the panicle quality of tillers (or main culm) is main culm>lst nodal tillers>primary tillers of seedling bed>primary tillers of main field>secondary tillers. It is concluded that to raise panicle quality, it is important to promote the early generating of lower nodal primary tillers and their secondary tillers, to inhibit the occurrance of high nodal (>9) primary tillers and their secondary tillers through appropriate cultural practices.
出处
《杂交水稻》
CSCD
北大核心
1998年第2期13-16,共4页
Hybrid Rice
基金
国家科委"863"计划生物技术研究项目
关键词
水稻
晚粳杂
稀播壮秧
分蘖
穗型质量
两系法
two-line japonica hybrid rice
late cropping season
super-sparsely seeding
tiller
panicle quality