%A ZHANG Zi-Chang, XU Yun-Ji, CHU Guang, WANG Zhi-Qin, WANG Hua-Meng, LIU Li-Jun, YANG Jian-Chang %T Population Quality of Rice under Different Irrigation Regimes %0 Journal Article %D 2011 %J Acta Agronomica Sinica %R 10.3724/SP.J.1006.2011.02011 %P 2011-2019 %V 37 %N 11 %U {https://zwxb.chinacrops.org/CN/abstract/article_4960.shtml} %8 2011-11-12 %X Establishment of a population with high quality is an important prerequisite to achieve high grain yield. Irrigation is one of the most important practices in rice production and plays a critical role in regulation of population quality. To understand the effect of irrigation regimes on population quality, we planted two rice cultivars currently used in the production, Yangdao 6 (an indica) and Yangjing 4038 (a japonica), treated with furrow irrigation between beds (FI), alternate wetting and soil drying (AWD), and traditional flooding as control (TF), for 10 days after transplanting to maturity. Compared with TF, FI and AWD increased grain yield by 10.60% and 8.43%, respectively. Both FI and AWD regimes reduced the number of unproductive tillers and increased percentage of productive tillers, area and length of top three leaves, grain-leaf area ratio, light transmission rate, dry matter accumulation from heading to maturity, and increased photosynthetic rate of flag leaf, root activity and root biomass during grain filling. The results demonstrate that both FI and AWD could improve population quality, and consequently, increase grain yield.