多效唑对直播粳稻各器官间分配关系的影响(英文)

Effect of Paclobutrazol on Distribution Relation Between Different Organs of Japonica Rice under Direct Seeding Model

该试验选用3个粳稻品种用110 mg/L的多效唑溶液浸种48 h后直播栽培,以清水浸种处理作为对照。通过测量水稻成熟期各器官干重和农艺性状的数据分析表明,多效唑浸种处理对水稻各器官干重的相关性影响小,但品种间存在显著差异。水稻第一、二节长与实粒重的相关性由0.024和0.056变成多效唑浸种处理后的-0.116和-0.042。多效唑降低了茎鞘重对实粒重的影响比重,最终导致水稻成熟期的光合积累无法得到有效转运。

Three japonica rice varieties were soaked in 110 mg/L paclobutrazol solution for 48 h and then directly seeded, and seeds soaked with clean water were used as a control group. The analysis of dry weights of various organs and agronomic traits showed that soaking of japonica seeds with paclobutrazol had little impact on the correlation between dry weights of various organs, but there were still significant differences between cultivars. The correlation coefficients between lengths of the first and second nodes with filled grain weight changed from 0.024 and 0.056 in the CK to -0.116 and -0.042 correspondingly after presoaking with paclobutrazol. Therefore, paclobutrezol reduces the effect of stem-sheath weight on filled grain weight, and as a result, photosynthetic product could not be effectively transported in maturation stage of rice.