%0 Journal Article %A ZHOU Yi %A GUO Shi-wei %A GAO Ying-xu %A CHEN Gui %A SHEN Qi-rong %T Effects of Coupling Between Nitrogen Forms and Water Stress on Content and Distribution of Phosphorus in Different Parts of Rice Plants at the Seedling and Tillering Stages %D 2006 %R %J Chinese Journal OF Rice Science %P 505-511 %V 20 %N 5 %X By using the method of nutrient solution culture and simulated water stress with PEG6000, the effects of different nitrogen forms (NO3--N, NH4+-N and the mixture of NO3--N and NH4+-N) and water statuses (non-water stress and water stress conditions) on P distribution in the different parts of rice plants at the seedling-tillering stage were studied. Under water stress, P content in the different parts of NH4+-N supplied rice plants was higher than that of the other two nitrogen forms supplied ones, meanwhile, P content in NO3--N supplied rice plants under non-water stress was higher than that under water stress, whereas water stress had no significant effect on P content in the rice plants supplied with NH4+-N and the mixture of NO3--N and NH4+-N. Regardless of water conditions, from the early tillering stage to the middle tillering stage, the ratio of P distributed to leaves and roots supplied with NH4+-N singly and the mixture of NO3--N and NH4+-N was reduced, while NO3-N nutrition only reduced the rate of P distributed to leaves at this stage. Furthermore, the increased rate of P accumulated in rice plants was higher under NH4+-N supplied plus water stress than other treatments in this period. %U http://www.ricesci.cn/EN/abstract/article_1456.shtml