Effect of light and soil NO3 on the No content of spinach 口0mgN/ kg soil 会1.6 口100mgN/ kg soil ■200mgN/ kg soi1 80.8 0.4 ow light High light as n levels in the soil increase. the No, content of vegetables such as spinach will also increase. Light also affects the level ofno, in the plant as light increases NO, levels decrease
0 0.4 0.8 1.2 1.6 2 NO3 content (% NO3-N in DM) Low light High Light Effect of light and soil NO3 - on the NO3 - content of spinach 0 mg N/kg soil 100 mg N/kg soil 200 mg N/kg soil As N levels in the soil increase, the NO3 - content of vegetables such as spinach will also increase. Light also affects the level of NO3 - in the plant. As light increases, NO3 - levels decrease
The European Union has set a limit of 2500 mg NO3/kg fresh weight of spinach
The European Union has set a limit of 2500 mg NO3 -/kg fresh weight of spinach
Crop Quality and application fertilizer As N supply goes up, the carotene(胡萝卜素) content of tomatoes and carrots increases Carotene is converted into vitamin a in the body It protects us from disease and helps our eyesight
Nutrition and Vitamin Content of Vegetables As N supply goes up, the carotene (胡萝卜素） content of tomatoes and carrots increases. Carotene is converted into Vitamin A in the body. It protects us from disease and helps our eyesight. Crop Quality and application fertilizer
Crop Quality and application fertilizer High levels of k generally increases the Vitamin C content in vegetables. High levels of n generally had the opposite effect (reduced Vitamin C) Vitamin C helps builds up connecting tissue in our body, heals wounds, and may strengthen our immune system
Nutrition and Vitamin Content of Vegetables High levels of K generally increases the Vitamin C content in vegetables. High levels of N generally had the opposite effect (reduced Vitamin C). Vitamin C helps builds up connecting tissue in our body, heals wounds, and may strengthen our immune system. Crop Quality and application fertilizer
Crop Quality and application fertilizer Fruit quality includes both taste and appearance. Inadequate levels of P and K may result in small fruits that are poor in taste Over fertilization with N may result in new shoot growth in apple trees. Ca taken up by the tree may move into the new shoots instead of the fruit, or dilute the Ca in fruit owing to bigger fruit resulting in a condition known as bitter pit
Plant Nutrition and Fruit Quality Fruit quality includes both taste and appearance. Inadequate levels of P and K may result in small fruits that are poor in taste. Over fertilization with N may result in new shoot growth in apple trees. Ca taken up by the tree may move into the new shoots instead of the fruit，or dilute the Ca in fruit owing to bigger fruit, resulting in a condition known as “bitter pit” Crop Quality and application fertilizer