【摘要】 以超级稻两优0293、GDS/RB207为材料,研究了4种密度对水稻高产栽培产量、产量结构及其叶面积组成的影响。结果表明:在低密度下群体产量随密度的增加而迅速提高;由适宜密度达到最高点后,进一步增大密度,产量便开始下降。叶面积LAI随密度的增大而增大,而有效、高效叶面积率随密度的增大而减少。其中两优0293、GDS/RB207适宜密度分别为8000株/667m2(27cm×25cm)、10000株/667m(225cm×26.5cm)能获得高产。更多还原

【Abstract】 Super hybrid rice Liangyou 0293 and GDS/RB207 were used as experimental materials to study the effects of four different planting densities on yield,yield components and leaf area composition.The results showed that the yield rapidly enhanced with increasing planting density under the condition of low planting density,and then it would be decreased when the planting density further increased after the optimum planting density reached to a peak.The leaf area index(LAI) increased with planting density increasing,but the effective leaf area index decreased with increasing planting density.The suitable planting density for Liangyou 0293 was 8 000 shoots/667 m2(27 cm×25 cm) and GDS/RB207 10 000 shoots/667m2(25 cm×26.5 cm).更多还原