南方农业学报2012，Vol.43Issue(7)：942-946,5.DOI:10.3969/j:issn.2095-1191.2012.07.942
耕作方式和大田水分管理对水稻氮素吸收利用的影响
Influence of field tillage patterns and water management on nitrogen assimilation and utilization in rice
摘要
Abstract
[Objective]The present study was conducted to investigate the effects of different tillage patterns and water management modes on nitrogen assimilation and utilization, and activities of nitrogen metabolism related enzymes in rice as well as soil nitrogen to provide references for optimizing rice cultivation techniques. [Method] Using Jinyou 253 and Guihan 1 as test materials, three water management modes such as wet irrigation, alternate irrigation and water layer irrigation and two soil tillage patterns such as non-tillage (NT) and conventional tillage (CT) in rice field were experimented in early and late seasons of 2008, the assimilation and utilization of nitrogen and physiological indicators of rice were determined al elongation, heading and maturity stages, respectively. [Result] Under the same tillage pattern, water layer irrigation could increase total nitrogen accumulation and nitrogen recover}' efficiency (NRE) in early rice relatively, increase GPT transaminase activity in leaves of rice and GS activity in leaves at elongation and heading stage oflate rice and at maturity stage of early and late rice of CT. Wet irrigation were beneficial to increasing nitrate reductase (NR) activity in rice leaves, GPT transaminase activity in rice leaves and nitrogem grain production efficiency at maturity stage, available nitrogen content in soil, and NRE in rice leaves in late rice, while decreeing rice yield of late season. Alternate irrigation was available for increasing GPT transaminase activity in leaves at elongation stage of early and late rice, and at heading stage of late rice, as well as GS activity in leaves at elongation and heading stage of early season. Under same water management mode, non-tillage was favorable for enhancing nitrogen accumulation in rice in alternate irrigation treatment, and total nitrogen and available nitrogen contents in soil of early and late rice. [Conclusion]Tillage patterns and water management modes played important roles in regulating nitrogen assimilation and utilization of rice, non-tillage and water-saving irrigation interaction was favorable for promoting soil nitrogen supplying capacity and nitrogen utilization efficiency.关键词
水稻/耕作方式/水分管理/氮素利用Key words
rice/tillage pattern/water management/nitrogen utilization分类
农业科技引用本文复制引用
陈仁天,唐茂艳,赵荣德,江立庚,王强,陈雷,梁天锋..耕作方式和大田水分管理对水稻氮素吸收利用的影响[J].南方农业学报,2012,43(7):942-946,5.基金项目
广西自然科学基金项目(2011GXNSFA018104) （2011GXNSFA018104）
广西科学研究与技术开发计划项目(桂科攻1123001-1A) （桂科攻1123001-1A）
广西农业科学院科技发展基金重点项目(桂农科2011JZ03) （桂农科2011JZ03）
