Phenology in rainfed lowland rice
Phenology in rainfed lowland rice
复制标题
旱作低地水稻的物候学
DOI：
10.1016/s0378-4290(99)00050-7
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发表时间：
1999
影响因子：
5.8
通讯作者：
S. Fukai
中科院分区：
文献类型：
--
作者：
S. Fukai
本文综述了影响低地水稻开花时间的因素和物候要求。最近的发展，在了解温度和光周期对水稻开花时间的影响，导致物候模型，可以准确地预测开花时间在灌溉领域。然而，在干旱的低地生态系统中，干旱和低土壤肥力通常会延迟开花时间。具有长延迟的基因型通常是那些在不利条件下产量大幅降低的基因型。在低地水稻中，在适当的插秧时间可能没有积水，晚些时候使用旧秧苗插秧会导致开花延迟。高产的最佳开花时间往往与水的供应有关，早开花的品种在发生晚季干旱的可能性高的地区受到青睐。然而，短持续时间的品种对胁迫的耐受性较低，如早期季节干旱，如果胁迫发生在营养阶段。水稻水分有效性的变化会引起产量的基因型物候-环境互作。进一步了解沼泽化低地的水分平衡将有助于确定沼泽化低地系统不同区域的最佳物候组。
This paper reviews the factors determining flowering time and phenology requirement in rainfed lowland rice. Recent developments in understanding of the temperature and photoperiod effects on flowering time of rice resulted in phenology models that can predict flowering time accurately in the irrigated field. However, in the rainfed lowland ecosystem drought and low soil fertility commonly delay flowering time. Genotypes with a long delay are often those with a large yield reduction under the adverse conditions. In rainfed lowland rice, there may not be standing water at the appropriate time for transplanting and the use of old seedlings for transplanting on a later date results in delay in flowering. Optimum time of flowering for high yield is often related to water availability, and early flowering cultivars are favoured in areas where the probability of occurrence of late season drought is high. However, short duration cultivars are less tolerant to stress such as early season drought if the stress develops during the vegetative stage. The variation in water availability in paddies would cause genotype phenology-environment interaction for yield. Further understanding of water balance in the rainfed lowlands would assist determination of the optimum phenology groups for different regions of the rainfed lowland system.