中国烟草科学2011，Vol.32Issue(2)：76-80,5.DOI:10.3969/j.issn.1007-5119.2011.02.017
岩溶区坡耕地烟水配套工程水肥差异性管理研究:钾素评价
Differentia Management of the Fertilizers and Water Applied in Water-tobacco Project on Slope Lands of Karst Region: Evaluation on Potassium
摘要
Abstract
Water-tobacco project program was carried out in karst region of Southwest China, at Bijie Prefecture as one of important tobacco production areas of Guizhou province.To evaluate fertilization and watering in water-tobacco project on level terraces of karst region and their effects on quality of tobacco leaves through threshold methods of potassium requested for soil and tobacco, soil pH, soil temperature and water saturation were tested in situ, and potassium elements of soil and tobacco were analyzed.The results showed that the soils on different sections of slope farmlands had differential water storage ability, following the order: lower slope＞middle slope＞upper slope.There were not evident differences in total potassium contents of soils among three sections of a slope, but great differences in available potassium contents existed, up to 188 mg/kg in topsoil of lower slope.Potassium contents in tobacco leaves varied from 7.4-31.9 g/kg, more than 20 g/kg only in tobacco leaves from lower slope farmlands, following the order:lower slope＞middle slope＞upper slope.So, differential managements of fertilization and watering are proposed to improve quality of tobacco leaves for water-tobacco project conducted on slope farmlands of karst areas due to their heterogeneity in keeping entropy and fertilizers.关键词
钾/烟草/岩溶环境/烟水配套/毕节/贵州Key words
potassium/ tobacco/ karst environment/ water-tobacco project/ Bijie Prefecture/ Guizhou分类
农业科技引用本文复制引用
谢运球,梁鸿,姚建陆,孟天友,罗志鹏,张敏..岩溶区坡耕地烟水配套工程水肥差异性管理研究:钾素评价[J].中国烟草科学,2011,32(2):76-80,5.基金项目
国家自然科学基金面(40872214) （40872214）
科技支撑计划课题(2008BAD98B07)和岩溶地质研究所基本科研业务费项目(2009007) （2008BAD98B07）
