叶面积对杨梅果实生长的影响研究

Effect of Leaf Area on the Fruit Diameter of Myrica rubra

根据不同叶面积累积的光温效应对于杨梅果实生长发育的影响,利用2010年1—6月的浙江省气象资料、野外物候观测资料及2010年室内杨梅的发育数据和杨梅大棚内的观测数据,建立以光温效应为尺度的杨梅果实发育模型,研究杨梅叶面积与杨梅果实生长的关系,并对其进行验证。利用模型对大棚内杨梅果实发育进程进行模拟,模型模拟的预测值与实测值间1:1线的回归估计标准误差RMSE和R2分别为0.03 cm、0.99,模型能较好的预测杨梅果实的发育进程。研究结果表明,在保留5、10、15、20片的情况下,杨梅发育速率与叶片数增加呈正相关,在保留25片叶时,发育速率较保留20片叶略有下降,适宜的叶面积是杨梅果实生长和品质形成的关键性因素。研究结果为杨梅的气象服务提供科学依据,也为杨梅的生产管理提供理论支持。

Based on the accumulated thermal and radioactive effects from different leaves area on the growth and development of Myrica rubra, use the meteorological data and outdoor phonological observation data from 2004 to 2010 in Zhejiang Province, the meteorological data and development date of Myrica rubra in greenhouse in 2010, build a accumulated thermal and radioactive effect model to predict Myrica rubra development stages. Several data were used to validate the model. It proved that the simulated results agreed well with the observed ones. Based on the 1：1 line, the root mean squared error（RMSE） and R2were 0.03 cm and 0.99. The simulation results show that there was a positive correlation between rate of Myrica rubra development and increasing of leaves, in the case that 5, 10, 15 and 20 leaves were kept. The rate of Myrica rubra development decreased slightly when 25 leaves were kept, compared with the condition happened when there ware 20 leaves kept. Those indicated that leaf area was the key to effect the fruit growth and quality formation of Myrica rubra. It can be concluded that the model developed in this study can give satisfactory prediction of Myrica rubra development date and can be used for decision making for the production of Myrica rubra and providing for meteorological service.