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本文系统研究了板栗扦插繁殖技术,插穗生根特性,嫩枝扦插不定根形成的细胞组织学基础和嫩枝扦插生根过程中营养物质的消长规律。结果表明,板栗嫩枝扦插,经HL—43生根剂(自制)处理,在全光照喷雾条件下,生根率可达80％以上,插条生根率与母树年龄、枝条木质化程度呈负相关;扦插时间以5月中旬～7月下旬最适宜,8月后生根率下降;插条部位以中部条生根率最高,基部条次之,梢部条最差;不定根主要发生于韧皮部和维管形成层,从皮部伸出,为皮部生根树种,愈伤组织生根极少,插条大量生根时间,碳水化合物和氮素含量明显下降,表明板栗扦插生根过程需要大量碳水化合物。
This paper systematically studied the chestnut cutting propagation techniques, rooting characteristics of cuttings, adventitious root formation process of adventitious shoots of the cell histology and rooting process of cuttings nutrition growth and decline. The results showed that the rooting rate of Chinese chestnut shoots was more than 80% under the condition of full light spray. The rooting rate of cuttings was negatively correlated with the age of mother trees and the lignification degree of shoots. The cutting time was the most suitable from mid-May to late July, and the rooting rate decreased after August. The rooting rate of the middle part of the cuttings was highest, that of the bottom part was the second, and the shoots were the worst. The adventitious roots mainly occurred in the phloem and the vascular formation Layer, extending from the dermis for the rooting tree species, callus rarely rooted, cutting a large number of rooting time, carbohydrates and nitrogen content decreased significantly, indicating that chestnut cutting rooting process requires a lot of carbohydrates.