早生桑对春霜冻害的生长反应  

Growth Response of Early Mulberry to Frost Damage in Spring

作　　者：韩世玉[1] 

机构地区：[1]贵州省蚕业科学研究所,遵义563007

出　　处：《贵州农业科学》2005年第6期47-49,共3页Guizhou Agricultural Sciences

摘　　要：对早生桑品种7920、育711、农桑8号、云桑1号、中桑5801春霜冻害后的春季生长性能、产叶量等分析表明:因品种不同,春霜冻害后再生发芽的时间有明显差异,一般11～17 d再次脱苞,52～70d开15片叶;副芽萌发成生长芽的比例最高可达59.26%;在生长盛期前,主芽生长快于副芽,生长盛期后,主、副芽生长趋于一致;在春霜冻害后,再生萌发生长绝对时间与正常年份相同的条件下,产叶量与正常年份没有明显差异,但生长芽叶量增加.The growth property and leaf yield of 7920, yu 711, nongsang 8, yunsang 1, and zhongsang 5801 （early mulberry varieties） were determined after frost damage in Spring. The results show that there is significant difference in regenerative budding time of different varieties after spring frost. The time of debud is about 11 - 17d and the fifteenth leaf emerge 52 - 70d. The proportion of growth bud from the secondary bud is up to 59.26%. The growth of main bud is faster than second bud before peak of growing season and the growth of main and second buds shows no difference after peak of growing season. There is no significant difference in leaf output between regenerative buds after frost damage and buds after no frost damage under the same growth time, but the number of growth bud after frost damage is increased compared with that of growth bud after no frost damage.

关 键 词：早生桑 春霜冻害 生长性能 

分 类 号：S888[农业科学—特种经济动物饲养]