摘要
两系粳杂作双晚栽培，高温是抑制分蘖发生，造成穗数不足的主要因素。本研究结果表明，只要采取超稀播育壮秧，大田促分蘖等适应两系粳杂特点的栽培措施，则可以减轻高温影响，显著提高大田分蘖，进而极显著增加单株分蘖、穴穗数和单株产量，且穴穗数每增加１个，增产４６９．
High temperature has been considered as a principal restraint to the development of tillers,which results in insufficient panicles,in the cultivation of two-line japonica hybrid rice grown as the latecrop in the double rice cropping pattern. Three seeding rates(A,150 kg/hm￣2 B, 225 kg/hm￣2;C,300 kg/hm2)with two per hill transplanting plants(a,.single plant;a2,double plants) of each seeding rate wereused to study for the effects of tillering characteristics on grain yield.The results showed that the limltationof high temperature may be reduced by such cultural practices as raising healthy seedlings through sparseseeding,which can significantly promote the tiller formation,thus increase panicles and grain yield.Theyield from the sowing arnount of 1 50 kg/hm2 was 5.98%and 6.47%higher than those from the sowingamount of 225 kg/hm2and 300 kg/hm2,respectively.
出处
《杂交水稻》
CSCD
北大核心
1996年第4期26-29,共4页
Hybrid Rice
关键词
两系示
杂交水稻
粳稻
超稀播
分蘖特性
栽培
two-line japonica hybrid rice
sparse seeding
tillering characteristics
yield
