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生长模型是定量研究果树干周生长过程的有效手段.果树干周生长规律常用L og istic方程、M itscherlich方程、三参数和四参数的R ichards方程、三角函数方程来模拟.本文首次用拟W e ibu ll方程模拟果树干周的生长规律,结果表明,W e ibu ll方程达到了与果树干周最佳拟合的效果,同时,本文方法可先给定由实际情况(如立地条件等)所确定的干周生长的最大值,这使得在研究中可以更好地预测果树将来的干周增长.另外,考虑到因实际情况所造成的初始干周不同这种普遍现象及其引起的生长过程的差异,本文直接引入与单株树体有关的基准干周作为参数,建立了与实际生长情况相结合的干周生长模型,获得了满意的结果.
Growth model is an effective method to quantitatively study the growth cycle of fruit tree trunk.While the law of growth of fruit tree trunk is often simulated by L og istic equation, M itscherlich equation, three-parameter and four-parameter R ichards equation and trigonometric function equation, The ebulline equation simulates the growth of fruit trees during the dry week. The results show that the W e ibu ll equation has the best fitting effect with the dry week of the fruit tree. At the same time, this method can be given by the actual situation (such as site conditions) The maximum dry week growth thus determined makes it possible to better predict the future dry week growth of the fruit tree in the study.Furthermore, taking into account the prevailing phenomenon of the initial dry week and the consequent growth caused by the actual situation This paper directly introduces the reference dry week related to a single tree as a parameter to establish a dry week growth model combined with the actual growth and obtain satisfactory results.