作物学报2011，Vol.37Issue(12)：2221-2232,12.DOI:10.3724/SP.J.1006.2011.02221
水分管理和氮肥运筹对水稻养分吸收、转运及分配的影响
Effects of Water Management and Nitrogen Application Strategies on Nutrient Absorption, Transfer, and Distribution in Rice
摘要
Abstract
Hybrid rice Gangyou 527 was used to investigate the effects of three irrigation regimes (submerged irrigation, W1; dry cultivation, W3; and the treatment W2 that was damp irrigation before booting stage, shallow irrigation at booting stage, wetting-drying alternation irrigation from heading stage to mature stage) and different nitrogen (N) application ratios on absorption, transport action and distribution of N, phosphorus (P), potassium (K), and yield in rice under the high yield condition of 180 kg N ha"1. The results showed that there was an obvious interaction between water management and N application strategies on grain yield and N, P and K absorption and transfer at the mainly growth stages. Under water -nitrogen interaction condition, there existed significantly positive correlations between the amounts of N, P and K absorption at various growth stages, and there existed highly significantly positive correlations between the accumulations of N, P, and K at heading stage and their transfer amounts during filling stage, but excess the ratio of postponed N application to the total N rate or W3 treatment resulted in the transport amounts of N, P, and K significantly decreased during grain filling e.g. 2.73-18.00%, 8.03-19.70%, 6.52-17.02%, respectively. Furthermore, there were positive correlations between yield and the accumulations of N, P, and K with the max correlation coefficients at heading stage, mature stage, and heading stage. The accumulations of N, K before heading stage could promote nutrient transfer and yield. According to yield performance and its relationship with N, P, and K absorption characteristics, the optimumratio of postponed N application to the total N rate was 40-60% under W1. The N application of base (30%), tillering (30%), and panicle (40%) fertilizers equally applied at stages of 4th and 2nd leaves emerged from the top under W2, was the best model in this paper referred to as the water-nitrogen application coupling management model. However, W3 treatment was suitable for using 20-40% of the ratio of postponed N application to the total N application rate.关键词
水稻/水分管理/氮肥运筹/养分吸收/转运及分配Key words
Rice/Water management/Nitrogen application/Nutrient absorption/Transfer and distribution引用本文复制引用
孙永健,孙园园,刘树金,杨志远,程洪彪,贾现文,马均..水分管理和氮肥运筹对水稻养分吸收、转运及分配的影响[J].作物学报,2011,37(12):2221-2232,12.基金项目
本研究由国家粮食丰产科技工程项目(2011BAD16B05),中国气象局西南区域气象中心2010年区域重大项目(2010-7),四川省教育厅资助科研项目(10ZA047)和四川省育种攻关专项(2006yzgg-28)资助. （2011BAD16B05）
