湘南地区引进杂柑天草适应性调查研究

Research about Adaptability of 'Tiancao' Citrus Trees Growing in the South of Hunan

通过对湘南地区引种栽培杂柑天草嫁接苗适应性进行研究,发现杂柑天草幼树阶段在湘南地区即使冬季气温不是十分低的年份,若不注意防冻也可发生冻害。冻害程度与土壤条件、防冻与否、苗木生长势有很大关系;紫色土上栽培的天草比第四纪红土和水稻田土上栽培的易冻,土层深厚疏松的土壤栽培的天草比粘薄土壤上的抗寒力要强;采取防冻措施可以大大减少冻害损失;苗木生长势强则抗寒能力强。

By investigating ‘Tiancao＇ Citrus grafting plant adaptabity which was introduced and cultivated in the south of Hunan Province,the following was found, during its sapling,it would suffer from freezing damage if no measures adopted for antifreezing, even in such a winter as normal temperature.The degree of freezing damage enjoyed close relationship with soil conditions,antifreezing,sapling growth potential. So, the Citrus in purple soil was the most sensitive one to freezing damage;the Citrus in deep and free soil growed better and obtained higher anti- freezing ability than in thin and hard soil;the freezing damage could be largely reduced if antifreezing measures adopted.