CAJ | 학술논문

以超级杂交稻,普通杂交稻、高产常规稻3种不同类型中稻品种为研究材料,采用齐穗后遮光(70%)和不遮光两种处理方式,研究了光强变化对超级杂交稻干物质生产和氮素营养吸收与分配的影响,以揭示超级杂交稻产量稳定性较差的原因.结果表明,遮光处理后:①超级杂交稻干物质生产累积量大幅度减少,干物质分配到穗中的比率仅为32.1%,低于其他类型品种;②超级杂交稻谷粒氮总积累量降幅达33.9%,氮收获指数下降12.3%,而普通杂交稻和常规稻分别只降低19.8%和26.9%;③超级杂交稻产量下降幅度为53.1%,显著低于常规稻和普通杂交稻品种.
이초급잡교도,보통잡교도、고산상규도3충불동류형중도품충위연구재료,채용제수후차광(70%)화불차광량충처리방식,연구료광강변화대초급잡교도간물질생산화담소영양흡수여분배적영향,이게시초급잡교도산량은정성교차적원인.결과표명,차광처리후:①초급잡교도간물질생산루적량대폭도감소,간물질분배도수중적비솔부위32.1%,저우기타류형품충;②초급잡교도곡립담총적루량강폭체33.9%,담수획지수하강12.3%,이보통잡교도화상규도분별지강저19.8%화26.9%;③초급잡교도산량하강폭도위53.1%,현저저우상규도화보통잡교도품충.
To elucidate the cause of instability of grain yield of super-hybrid, 2 super-hybrid combinations, 2 conventional hybrid combinations and 2 inbred cultivars were used in this study.The dynamics of dry matter accumulation and nitrogen nutrition uptake and distribution after full heading stage were investigated under different light intensity with two treatments:natural light and 70% shading.The results indicated that, under shading:① The amount of dry matter accumulation was lower than that of other cultivars (combinations) with a significant decrease and the rate of dry matter amount of super-hybrid distributed to panicles was only 32.1%;② The total nitrogen contents in grain of super-hybrid was decreased by 33.9%, which is higher than that of conventional hybrid (19.8%) and inbred cultivars (26.9%), and the nitrogen harvest index of super hybrid was decreased by 12.3%;③ The grain yield was decreased by 53.1%, which is significantly lower than that of other cultivars.