土壤与作物Issue(4)：151-155,5.DOI:10.11689/j.issn.2095-2961.2015.04.002
等氮条件下双氰胺添加量对江西红壤芝麻产量和硝态氮的影响
Effects of Different Dicyandiamide Rates on Sesame Yield and Nitrate Nitrogen under the Equivalent Nitrogen Condition in Red Soil, Jiangxi Province
摘要
Abstract
Dicyandiamide and nitrogen combination can improve nitrogen use efficiency , but the optimal rate of dicyandiamide varies in different soils.The objective of this study was to explore the effect of optimal rate of dicyandiamide on sesame yield and nitrate nitro -gen under the equivalent nitrogen condition in red soil.Seven dicyandiamide rates were implemented with 0%, 3%, 5%, 7%, 10%, 15%and 20%in field, respectively.The result showed that dicyandiamide with nitrogen fertilizer could improve sesame yield , harvest index and economic benefits.The 5%dicyandiamide rate treatment was the best in all treatments.Compared with control treat-ment, 5%dicyandiamide rate increased sesame yield , harvest index and economic benefits by 126%, 29.0% and 183%, respec-tively;sesame yield, harvest index and economic benefits decreased with the increase in dicyandiamide rate.However, soil nitrate ni-trogen content decreased with the increase in dicyandiamide rate , and the nitrate nitrogen content in all dicyandiamide application treatments decreased by 11.6%~22.3%compared to control treatment.Therefore, 5%dicyandiamide was the optimal rate for sesame under 90 kg N· hm-2 application , which not only significantly increased the sesame yield and economic benefits , but also decreased soil nitrate nitrogen accumulation in red soil.关键词
双氰胺/红壤旱地/芝麻/硝态氮Key words
dicyandiamide/red soil/sesame/nitrate nitrogen分类
农业科技引用本文复制引用
柳开楼,胡惠文,周利军,叶会财,徐小林,王赛莲..等氮条件下双氰胺添加量对江西红壤芝麻产量和硝态氮的影响[J].土壤与作物,2015,(4):151-155,5.基金项目
江西省科技支撑计划资助（20141BBF60050）；公益性行业（农业）科研专项经费资助（201203030）；江西省自然科学基金（2015BAB214008）。 （）
