Efficiency of Prior Harvest Treatments with Different Nutrient Solutions to Lower Nitrate Content in Lettuce
文献类型: 外文期刊
第一作者: Liu Wenke
作者: Liu Wenke;Yang Qichang;Zhou Wanlai
作者机构:
关键词: Nitrate;lettuc;prior harvest treatment;nutrient solution
期刊名称:2009 ACADEMIC CONFERENCE ON HORTICULTURE SCIENCE AND TECHNOLOGY, PROCEEDINGS
ISSN:
年卷期: 2009 年
页码:
收录情况: SCI
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 SPAD 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 K(2)SO(4) and 5x10(-5)mmol/L ammonium molybdate decreased nitrate content in lettuce significantly. It is concluded that N deprivation, osmotic regulation anion K(2)SO(4), 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.
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