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以前期分蘖半散生、抽穗后直立的分蘖角度动态型水稻材料DI508为研究对象,对照全生育期直立型材料9308和全生育期半散生型材料M09,研究了全生育期分蘖角度的变化和相关的生理生态特性。结果表明,DI508在分蘖期具有明显的丛生快长和拔节后直立抽穗的特性,生育后期上3叶功能稳定。其主茎的第1、第2和第3分蘖在始蘖期与水平地面夹角平均值分别为59.74°、62.94°和68.54°,与半散生水稻材料M09表现一致;抽穗后接近90°,与直立型水稻材料9308表现一致。DI508的分蘖成穗率为68.35%,较M09的66.24%增加3.09个百分点。DI508成熟期单株干物质量为155.54g,较M09和9308分别高15.84%和64.09%;平均单蘖干物质量9.15g,较M09和9308高63.69%和44.78%。拔节后至成熟,DI508的上3叶净光合速率平均值为26.89、25.69和24.83μmol/(m2.s),具有较强的光合功能。最后,讨论了分蘖角度动态型水稻前期半散生快长、后期直立灌浆特性的生长优势以及在水稻高光效、高产育种上的潜在利用价值。
In this study, tillering and semi-dispersing, tillering angle dynamic rice material DI508 after erectus were used as research object. The changes of tillering angle during the whole growth period were studied in contrast with upright material 9308 in full growth period and semi-random material M09 in whole growth period And related ecophysiological characteristics. The results showed that DI508 had the characteristics of fast growth at the tillering stage and upright heading after tillering stage, and the function of the upper third leaf in the late growth stage was stable. The average tiller angles of the first, second and third tillers of the main stem at the initial tillering stage were 59.74 °, 62.94 ° and 68.54 °, respectively, which were consistent with those of M09; , Consistent with the performance of upright rice material 9308. The tillering rate of DI508 was 68.35%, which was 3.09% higher than 66.24% of M09. The dry matter weight per plant of DI508 was 155.54g, which was 15.84% and 64.09% higher than that of M09 and 9308, respectively. The average dry matter weight per single tiller was 9.15g, which was 63.69% and 44.78% higher than that of M09 and 9308 respectively. After jointing to maturity, the average net photosynthetic rate of the upper third leaves of DI508 was 26.89, 25.69 and 24.83μmol / (m2.s), respectively, with a strong photosynthetic function. Finally, the growth predominance of fast growing early and late upright grouting characteristics of tillering angle dynamic rice and its potential utilization in high light efficiency and high yielding breeding were discussed.