烟草科技2017，Vol.50Issue(11)：16-21,6.
有机肥-膨润土-腐植酸复合调理剂对黄壤土吸附氮素的影响
Effects of organic fertilizer-bentonite-humic acid composite conditioner on nitrogen adsorption of tobacco-growing yellow soil
摘要
Abstract
To effectively improve the ability of nitrogen uptake and to decrease the loss of nitrogen in a tobacco field, the effects of a composite soil conditioner consisting of an organic fertilizer, bentonite and humic acid (HA)on NH4+-N adsorption properties of yellow soil were studied with a soil culture experiment and an isothermal adsorption experiment. The results showed that in this experiment, the effects of soil conditioner on NH4+-N uptake enhanced gradually with the proceeding of culture time and peaked at 546.34 mg/kg on the 60th day. The isothermal adsorption curves of NH4+-N in different treatments could be well fitted by Langmuir equation. With the increase of soil conditioner rate, the maximum adsorption capacity(Qmax)of soil for NH4+-N raised. The ratio of humic acid in soil conditioner influenced the adsorption of yellow soil for NH4+-N. When the ratio of humic acid in soil conditioner was 20%, the capacity and intensity index of NH4+-N adsorption of yellow soil increased significantly. For flue-cured tobacco production, the mixture of organic fertilizer, bentonite and humic acid at a ratio of 6:2:2 could be used as soil conditioner, and its application amount should be determined according to the soil fertility of tobacco fields. In conclusion, the composite soil conditioner consisting of organic fertilizer, bentonite and humic acid can effectively regulate the nitrogen content and intensity index of yellow soil and significantly increase the content of NH4+-N in yellow soil, which ensures the nitrogen need of flue-cured tobacco at early growing stage and reduces the environment risk of nitrogen.关键词
烟田/黄壤土/腐植酸/氮素/吸附Key words
Tobacco field/Yellow soil/Humic acid/Nitrogen/Adsorption分类
农业科技引用本文复制引用
王彦锟,周鑫斌,徐宸,徐润泽,谢德体,何荣,金亚波..有机肥-膨润土-腐植酸复合调理剂对黄壤土吸附氮素的影响[J].烟草科技,2017,50(11):16-21,6.基金项目
中国烟草总公司重点项目"山地烟田分类治理与降酸提质关键技术研究与应用"(110201502015) （110201502015）
广西中烟工业有限责任公司科技项目"奉节县烟区以农家肥为主的土壤改良及烟叶质量提升研究"(CG2016109022). （CG2016109022）
