温室水果黄瓜叶片生长规律研究

Study on the Disciplinarian of Greenhouse Cucumber Leaf Growth

利用气象资料和作物数据,分析了温室水果黄瓜在不同生育阶段各叶位叶片的出生、伸展与有效积温和累积辐射的关系。结果表明,出叶数与有效积温和累积辐射的关系均符合Photosynthesis函数,其中出叶数与有效积温的相关性相对更好。叶长净增长量与有效积温和累积辐射的关系符合Sigmoid函数,此函数中的参数与叶位有关;各叶位叶片伸展到最大所需的有效积温、累积辐射在同一个生育阶段内基本恒定,在各生育阶段之间有所差异。在有效积温、累积辐射相同时,营养生长阶段叶长净增量随叶位升高而增大,开花结瓜阶段叶长净增量随叶位升高而减小,成熟阶段叶长净增量随叶位升高而增大。这是由于在温室黄瓜生长发育过程中,随着生育阶段的不同,植株的生长中心发生转移而造成的。

Base on meteorological and crop data, the relationships between the greenhouse cucumber leaf growth and the effective accumulated temperature and accumulative radiation are analyzed. The result shows that the relationships between the emerged leaf number and the effective accumulated temperature and the accumulated radiation are in accord with the Photosynthesis function, while the relationship between the emerged leaf number and the effective accumulated temperature is better. The relationships between the leaf length＇s net increment and the effective accumulated temperature and the accumulated radiation conform to the Sigmoid function because the parameters in Sigmoid function are related to the leaf position. For various positions, the effective accumulated temperature and the accumulated radiation needed for leaf blade to reach the maximum length are basically invariable in the same growth phase, while vary in different phases. When the effective accumulated temperature and the accumulated radiation are the same, the leaf length＇s net increments in the vegetative growth and mature phases increase with the leaf position, while in the flowering and fruiting stage, they decrease with the increase of leaf position. This is because that the plant organic center shifts in different growth stages during the greenhouse cucumber growth process.