SHI Zhao,WANG Ya-zhi,LIU Guo-jie.Application of Logistic Equation on Determination of the Semi-lethal Temperature of Five Different Varieties of Apple Branches[J].Northern Horticulture,2013,37(02):36-38.
应用Logistic方程确定五种苹果枝条的半致死温度的研究
- Title:
- Application of Logistic Equation on Determination of the Semi-lethal Temperature of Five Different Varieties of Apple Branches
- 文章编号:
- 1001-0009（2013）02-0036-03
- 关键词:
- 电解质外渗率; 膜透性; Logistic方程; 半致死温度
- Keywords:
- leakage ratio of electrolyte; membrane permeability; Logistic equation; the semi-lethal temperature
- 分类号:
- S 661
- 文献标志码:
- A
- 摘要:
- 以“龙丰”、“龙冠”、“海棠优系1”、“海棠优系2”、“富士”5种苹果的1 a生休眠枝条为试材，采取人工模拟外界环境的方法进行不同梯度的低温处理，测定5种苹果枝条的电解质外渗率，并配合Logistic方程对各品种枝条的低温半致死温度（LT50）进行了拟合。结果表明：随处理温度的不断降低，5种苹果枝条的电解质外渗率变化趋势呈现明显的“S”型曲线；在-36.4~-44.7℃时，各品种枝条的半致死温度（LT50）先后出现，抗寒力强弱顺序为：“龙丰”（M.pumila ‘Longfeng’）＞“海棠优系1”（M.spectabilis‘Ⅰ’）＞“龙冠”（M.pumila ‘Longguan’）＞“海棠优系2”（M.spectabilis‘Ⅱ’）＞“富士”（‘Fuji’ Apple）。
- Abstract:
- Taking M.pumila ‘Longfeng’， M.pumila ‘Longguan’,M.spectabilis‘Ⅰ’, M.spectabilis‘Ⅱ’,‘Fuji’ apple five different varieties 1-year-old dormant branches of apple as test materials，annual dormant branches from the changes of leakage ratio of electrolyte and the influence of the semi-lethal temperature(LT50) were investigated.The changes of leakage ratio of electrolyte of the branches which were treated under different artificial simulated low temperature were studied.The semi-lethal temperature (LT50) was obtained on the basis of conductivity and Logistic equation.The results showed that leakage ratio of electrolyte increased like ‘S’ curve concomitant with temperature reducing.The semi-lethal temperature for apple was from -36.4℃ to -44.7℃.The sequence of the cold resistance was M.pumila ‘Longfeng’ ＞M.spectabilis‘Ⅰ’＞M.pumila ‘Longguan’＞M.spectabilis‘Ⅱ’＞‘Fuji’ Apple.
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备注/Memo
第一作者简介：时朝（1980-），男，博士，助理研究员，现主要从事植物生理生化与林果资源利用等研究工作。E-mail：shizhao_bj@126.com.