超高产两系杂交中籼两优6326强化栽培技术研究

[目的]研究两优6326杂交稻强化栽培技术。[方法]试验采用大区设计,强化栽培采用大孔软盘旱育秧,四周起垄栽培,每次沟中灌满水可保持7 d左右;水稻栽插密度设3个处理:强化栽培(6.7+16.6)cm×26.7 cm(S1)、强化栽培23.3 cm×26.7 cm(S2)、常规栽培16.6 cm×20.0 cm(CK);通过强化栽培与常规栽培对比,分析两优6326农艺、经济性状变化趋势,探讨不同栽培措施的作用效果。[结果]强化栽培S1处理获得实产9 940.5 kg/hm2,比对照增产5.0%,其有效穗比对照多15.0万/hm2,每穗实粒数多12.2粒,千粒重高0.7 g;S 2处理的有效穗比对照少16.5万/hm2,每穗实粒数多12.1粒,千粒重高1.2 g,产量与对照相当。[结论]强化栽培下两优6326表现穗大、结实率和千粒重高的特点,栽插密度以(6.7+16.6)cm×26.7 cm为宜。

Research on the Intensified Cultivation Techniques of Super-high-yielding Two-line Hybrid Rice Liangyou 6326 of Medium Indica

[Objective] The purpose was to research the intensified cultivation techniques of hybrid rice variety Liangyou 6326.[Method] The macrozone design was used in the experiment and the dry seedling raising in macroporous flopy disk and ridge culture around were used in the intensified cultivation and each full irrigation of channel could sustain about 7 d.Three treatments in planting density of rice were set up,i.e.intensified cultivations(6.7+16.6) cm×26.7 cm(S1) and 23.3 cm×26.7 cm(S2) and conventional cultivation 16.6 cm×20.0 cm(CK).The changing trends of Liangyou 6326 on agronomic and economic characters were analyzed through comparing intensified cultivation with conventional cultivation and then the effects of different cultivation measures were discussed.[Result] Compared with CK,the obtained actual yield in S1 treatment was 9 940.5 kg/hm2,increasing by 5.0%,its available ears were 15×104/hm2 more,its full grains per ear were 12.2 more and its 1 000-seed weight was 0.7 g higher.Compared with CK,the available ears in S2 treatment was 16.5×104/hm2 less,its full grains per ear were 12.1 more,its 1 000-seed weight was 1.2 g higher and its yield was equal.[Conclusion] Liangyou 6326 showed characters such as big ear,high seed setting rate and 1 000-seed weight in intensified cultivation,with suitable planting density of(6.7+16.6) cm×26.7 cm.