中国烟草科学Issue(1)：61-67,7.DOI:10.13496/j.issn.1007-5119.2015.01.012
钾用量与灌溉量对不同土层钾素及烟叶钾含量的积累效应
Effect of Potassium Rate and Irrigation Frequency on Potassium Contents of Different Soil Layers and Tobacco Leaves
摘要
Abstract
To explore the effect of potassium in tobacco leaf and forms of potassium in different layers of soil and to solve issue of low potassium content in tobacco in central Henan, an experiment was carried out in Xiangcheng, Xuchang of Henan province in 2013. Two levels of potassium fertilizer were used, and the tobacco were irrigated for three times, between accumulation of potassium in tobacco leaf and content of different forms of potassium in different depth of soil were analyzed using gray correlation analysis, The results showed that with the three irrigation and use of low levels of potassium fertilizer, correlation coefficient was 0.7059, indicating that tobacco potassium content was most closely correlated with slowly available potassium in the 0-20 cm soil. With the irrigation three times and use of high levels of potassium fertilizer, correlation coefficient was 0.7350, indicating that tobacco potassium content was most closely correlated with rapidly available potassium in the 40-60 cm soil and leaf potassium content was 1.88%, and it is also the best quality of tobacco leaves. With the decrease in potassium fertilizer rate and irrigation, their correlation with potassium content in tobacco and in different layers of soil was more significant. Frequent wet-dry alteration would help release slowly available potassium, thus increasing the level of rapidly available potassium. When fertilizer ratio was at N:P2O5:K2O=1:1:4.5, and irrigated for 3 times, increasing potassium fertilizer rate and frequency of irrigation was an good means to address the problem of low potassium content of tobacco in the late growth.关键词
烟叶/土壤/钾素/关联分析Key words
tobacco leaf/soil/potassium/correlation analysis分类
农业科技引用本文复制引用
郭清源,丁松爽,刘国顺,李淑霞..钾用量与灌溉量对不同土层钾素及烟叶钾含量的积累效应[J].中国烟草科学,2015,(1):61-67,7.基金项目
国家烟草专卖局特色优质烟叶开发重大专项 （）
