南果梨红叶营养状况与生理生化指标特征研究

Study of Correlation between Nanguo Pear'Red Leaves'Disease Sutritional Status with Physiological and Biochemical Indicators

通过测定不同"红叶"程度南果梨树叶片的养分含量及生理生化指标,分析不同红叶程度、不同叶位叶片各指标变化,了解南果梨树红叶形成时营养状况与生理指标的关系,探讨其"红叶病"成因。结果表明:养分缺失是南果梨"红叶病"形成的重要原因之一。当叶片中N、P、K含量的置信区间在2.24%～3.24%、0.32%～0.34%、0.66%～0.68%时出现红叶,置信区间在1.84%～2.93%、0.31%～0.33%、0.50%～0.57%出现重度红叶。此时叶片中叶绿素含量降低3.9%、抗氧化能力降低27.3%、膜脂过氧化程度升高5.8%。

After measurement of nutrition contents and physiological-biochemical index of different levels of red sick leaves,an analysis of comparision between different levels of sick red leaves and nutrition index changes in different sites on the red leaves suggests that and physiological index and nutritional status affect the formation of the 'Nanguo' pear red sick leaves.The results showed that nutrient deficiency was the keypoint for the 'Nanguo' pearsick leaves to form red sick leaves.Mild red sick leaves will appear when confidence interval N,P,K,2.24%～3.24%,0.32%～0.34%, 0.66%～0.68%and heavier 1.84%～2.93%,0.31%～0.33%,0.50%～0.57%.at this time,nchlorophyll content, antioxidant capacity and lipid peroxidation less than 3.9%,27.3%,and increased 5.8%in leaves.