Abstract
The influence of mineral NPK fertilizers and organic fertilizers such as manure compost, woodchip compost and blood meal on the yields and the nutritive value of leeks and turnips were compared. Fertilizers were applied on the two crops grown successively in 200-1 containers. Mineral fertilizers, manure compost and blood meal provided equivalent vegetable yields. Contents in dry matter, ascorbic acid and minerals of leeks and turnips were not strongly affected by the different fertilization regimes. The nitrate content of both crops was significantly lower under the application of manure compost and woodchip compost, while mineral fertilizers and blood meal induced similar, higher nitrate levels. The present work thus provides new data showing the usefulness of composts in growing vegetables with low nitrate contents.
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