烟草科技2016，Vol.49Issue(5)：1-7,7.DOI:10.16135/j.issn1002-0861.20160501
广东南雄烟区土壤氮素矿化特征及烟株对氮素的吸收和累积规律
Characteristics of soil nitrogen mineralization and effects on nitrogen absorption and accumulation in tobacco plants in Nanxiong tobacco planting areas
摘要
Abstract
In order to study the characteristics of nitrogen supply of three main tobacco planting soil types (muddy sand soil,“cow liver”soil and purple soil) in Nanxiong and the nitrogen absorption by flue-cured tobacco grown in these soils, field experiments were conducted to study the characteristics of soil nitrogen mineralization and the effects on nitrogen absorption and accumulation in tobacco plants. The results showed that: 1) During the period of tobacco growth, the amount of soil nitrogen mineralization increased continuously, the total mineralization levels were 360.27, 327.50 and 277.82 kg·ha-1 in muddy sand soil,“cow liver”soil and purple soil, respectively. The percentage of nitrogen mineralization at tobacco mature stage was above 60%. 2) The nitrogen accumulation in tobacco generally displayed a“slow-fast-slow”curve, nitrogen accumulation peaked in 45-60 days after transplant with the total accumulation reached 5.36, 4.81 and 4.19 gN·plant-1 in the three soil types, respectively. 3) Nitrogen utilization was 34.04%, 33.11% and 30.53% in the three soil types, respectively. Therefore, to improve the utilization efficiency of nitrogen fertilizers and avoid excessive nitrogen supply at late growth stage, advancing nitrogen application time, reducing application rate and increasing application times were recommended in tobacco production.关键词
烤烟/土壤类型/氮素/矿化/积累Key words
Flue-cured tobacco/Soil type/Nitrogen/Mineralization/Accumulation分类
农业科技引用本文复制引用
王军,谢玉华,王全,陈泽鹏..广东南雄烟区土壤氮素矿化特征及烟株对氮素的吸收和累积规律[J].烟草科技,2016,49(5):1-7,7.基金项目
中国烟草总公司重大专项“浓香型特色优质烟叶开发”（110201101001TS-01）。 （）
