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茶树茎杆裂伤型冻害是发生在内陆温暖地区,常常是10～12月初霜到来后茶树耐寒性还处于较弱的情况下发生的一种冻害,它的特点是茎杆的皮层纵向裂开而发生损伤,多发生在幼龄茶树和成龄茶树的徒长枝上,其原因是,(1)幼龄茶树根系还不发达、不深,当土壤冻结后,供水困难,茶树遭受干冻;(2)幼龄茶树叶层薄,茎杆部分温度低,近地表部分的茎杆温度特别低而容易受冻;(3)幼龄茶树秋梢生长量大,停止生长迟。比成龄茶树耐寒性弱,就植物本身两言,茎杆形成层活性较高,秋梢老化过程中,茎杆形成层的活性是从上到下逐渐降低的,接近根颈部的茎杆,其耐寒性获得往往最迟,遇到初霜或持
Tea tree stalks laceration frost damage occurs in the inland warm area, often the early arrival of frost in 10 ~ early December after the cold resistance of tea is still weak, which is characterized by the longitudinal ciliate crack (1) young root system of tea is still underdeveloped, not deep, when the soil is frozen, the water supply is difficult, the tea tree is subjected to freeze-drying ; (2) young tea leaves thin, part of the stem temperature is low, near the surface of the stem part of the temperature is particularly low and easily affected by cold; (3) young tea tree shoot growth, stop growing late. Compared with the mature tea trees, the cold tolerance of the tea plants is weaker than that of the plants themselves, and the activity of the stem formation layer is gradually decreased from top to bottom during the autumn tip aging process. The stalk near the root and neck , Its resistance to cold is often the latest, encountered the first frost or hold