Water control experiment of potted plant was conducted to study the effects of combination of water and fertilizer at different growth stages on the chlorophyll content of flue-cured tobacco.Research showed that with the same amount of fertilizer,the content of chlorophyll increased as the soil moisture increased;and with the same soil moisture,the content of chlorophyll increased as nitrogen fertilizer increased;the interaction between water and fertilizer was obvious in the growing and bud period.The effe...