Efficiency of Prior Harvest Treatments with Different Nutrient Solutions to Lower Nitrate Content in Lettuce

摘要：

A greenhouse experiment was conducted to investigate the efficiencies of prior harvest treatments with different nutrient solution to lower nitrate content in lettuce. The results showed that no difference was found in SPAO values of lettuce leaves between different nutrient solution treatments. In addition, efficiencies of eight nutrient solutions in reducing nitrate content in lettuce were different Compared with full nutrient solution, N-free nutrient solution, 0.75 mmol/L K2SO4 and 5xlO5mmol/L ammonium molybdate decreased nitrate content in lettuce significantly. It is concluded that N deprivation, osmotic regulation anion K2SO4, and molybdate salt are effective in decreasing nitrate content in lettuce at prior harvest treatment. The results indicated that it was possible to produce low nitrate content lettuce in hydrponic cultivation with easier prior harvest treatment methods.

关键词： Nitrate lettuc prior harvest treatment nutrient solution

作者: LIU WENKE YANG QICHANG ZHOU WANLAI

作者单位: Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences, Key Lab. for Agro-Environment & Climate Change, Ministry of Agriculture, Beijing,China

会议类型: 国际会议

会议名称: 2009 Academic Conference on Horticulture Science and Technology(2009园艺科学与技术学术会议 CHST 2009)

会议地点: 北京

会议语种:英文

页码: 209-210

在线出版日期: 2009-12-12（万方平台首次上网日期，不代表论文的发表时间）