Thermal Requirements and Determinants for Growing Fruit Trees


and dispersal of plants and its growth, become its affect on its physiological of vital operation like photosynthesis, respiration and water absorption, each physiological process increase with rise in temperature till reaching the optimal degree and then starting to decrease. For each type or kind of this trees there is a minimum growth temperature known as zero temperature of growth at which the plant start to grow and step growing of bit decrease under this level. In the other hand for each kind there is a maximum growth temperature if exceeding it the trees stop growing and for each type of fruit trees is optimum growth temperature which lie between this upper and lower degrees