2007•WIT transactions on ecology and the environmentRequires access
Effect of water on nitrate and nitrite concentration of rape after picking
Liu Yang
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Abstract
A pot experiment of rape was conducted to investigate the effect of water on nitrate and nitrite concentration of rape after picking with three irrigation level of 100%, 75% and 50% field capacity. Results showed that nitrate and nitrite concentration of rape were affected by irrigation level and storage time. During the period of eight days after picking, the nitrate concentration of rape in the irrigation treatment of 0.50θf irrigation level was the highest in all the irrigation treatment .While the nitrate concentration of rape in the irrigation treatment of 1.00θf irrigation level was the lowest on the picking day. The nitrate concentration of rape in the irrigation treatment of 0.75θf irrigation level was higher than that at 1.00θf irrigation level on the picking day , but decreased to the lowest in all the irrigation treatment after the picking day. The nitrite concentration of rape was the lowest in the irrigation treatment of 1.00θf irrigation level in all the irrigation treatment on the picking day .The concentration of nitrate and nitrite decreased, then increased and fell again after picking in all the irrigation treatment. It is concluded that the irrigation level of 1.00θf and made the rape been eaten in one or two days after picked up, had an advantage in reducing the nitrate and nitrite concentration of rape and should be applied in the cultivation of rape.