作物学报Issue(1)：84-92,9.DOI:10.3724/SP.J.1006.2013.00084
施氮量和灌溉方式的交互作用对水稻产量和品质影响
Effect of Interaction between Nitrogen Rate and Irrigation Regime on Grain Yield and Quality of Rice
摘要
Abstract
This study investigated how nitrogen rates and irrigation regimes and their interactions affect grain yield and quality of rice, which would have great significance in conducting the cultivation for high yielding, good quality and high efficiency. Two rice cultivars, Liangyoupeijiu (indica) and Yangjing 4038 (japonica), were grown in the tanks filled with soil. Three irrigation regimes, conventional irrigation (CI), alternate irrigation with wetting and moderate drying (WMD) and alternate irrigation with wetting and severe drying (WSD), and three nitrogen (N) rates, 0N (0 kg ha–1), medium amount of N (MN, 240 kg ha–1), and high amount of N (HN, 360 kg ha–1), were used during the whole growing season. The results showed that, at either MN or HN rate, grain yield, head rice, apparant quality, and breakdown were significantly higher or better under the WMD regime than under the CI regime. At the MN rate, the WSD regime significantly decreased grain yield and quality as compared with the CI regime. At the HN rate, however, the grain yield was higher under the WSD regime than under the CI regime and grain quality showed no significant difference between the two irrigation regimes. The WMD regime significantly increased photosynthetic rate of the flag leaf, activity of adenosine triphosphate enzyme (ATPase) in grains and contents of indole-3-acetic acid, zeatin+zeatin riboside, and abscisic acid in roots during grain filling. All the data indicate that interactions between nitrogen rates and irrigation regimes mediate the grain yield and quality of rice. Stronger root activity, greater leaf photosynthetic rate and larger sink strength contrib-ute to higher grain yield and better grain quality of rice under the MN rate and WMD regime.关键词
水稻/轻干湿交替灌溉/重干湿交替灌溉/氮肥/产量/品质Key words
Rice/Alternate irrigation with wetting and moderate drying/Alternate irrigation with wetting and severe drying/Ni-trogen fertilizer/Grain yield/Grain quality引用本文复制引用
张自常,李鸿伟,曹转勤,王志琴,杨建昌..施氮量和灌溉方式的交互作用对水稻产量和品质影响[J].作物学报,2013,(1):84-92,9.基金项目
本研究由国家重点基础研究发展计划(973计划)项目(2009CB118603),国家自然科学基金重大国际合作交流项目(31061140457),国家自然科学基金项目(31071360,31271641),中央级科研院所基本科研业务费专项基金项目(农业)(201103003,201203079),国家“十二五”科技支撑计划项目(2011BAD16B14,2012BAD04B08)和江苏高校优势学科建设工程专项经费资助 （973计划）
