摘要
钙、镁是影响烤烟产量和品质的重要中量营养元素。为了解黔南山地植烟土壤交换性钙、镁丰缺状况。2009年在黔南州9个县（市）采集植烟土壤样品1250份，并进行土壤交换性钙、锾含量分析。结果表明：黔南州植烟土壤交换性钙含量在50．90-63331．12mg／kg，平均为1310．12mg／kg；交换性镁含量在1．14～1583．17mg／kg，平均为182．44mg/kg。27％的土壤缺钙，主要位于独山县和龙里县。15.3％的土壤缺镁，主要位于独山县和惠水县。交换性钙镁比超过20的土壤占14．8％，主要位于平塘县、惠水县、长顺县和独山县。土壤pH值与交换性钙、镁呈正相关关系，pH值对交换性钙影响比交换性镁大。
Calcium and magnesium are essential middle elements that affect tobacco yield and quality.To investigate abundance and deficiency of tobacco-growing soil exchangeable calcium and magnesium in the south of Guizhou Province, 1 250 soil samples were collected from 9 tobacco-growing counties,and exchangeable calcium and magnesium were determined in 2009.Results showed that soil exchangeable calcium in the south of Guizhou Province ranged from 50.90 mg/kg to 63 331.12 mg/kg,and the mean was 1 310.12 mg/kg.Soil exchangeable magnesium ranged from 1.14 mg/kg to 1 583.17mg/kg,and the mean was 182.44 mg/kg.Soil with exchangeable calcium deficiency,which were mainly located in Dushan county and Longli county, accounted for 27 per cent of the whole samples.Soil with exchangeable magnesium deficiency, which were mainly located in Dushan County and Huishui County, accounted for 15.3 per cent of the whole samples.Soil that the ratios of exchangeable Ca/Mg was above 20,which were mainly located in Pingtang County, Huishui County, Changshun County and Dushan County, accounted for 14.8 per cent.
出处
《现代农业科技》
2013年第19期250-251,255,共3页
Modern Agricultural Science and Technology
基金
贵州省黔南州烟草公司"十二五"科技重大专项"黔南山地烤烟专用肥区域配方及施肥技术研究"
关键词
植烟土壤
交换性钙
交换性镁
钙镁比
黔南州
tobacco-growing soil
exchangeable calcium
exchangeable magnesium
Ca/Mg
the south of Guizhou Province
