Influence de la desinfection [du sol] a la vapeur sur les pertes en elements fertilisants par drainage [en culture de serre].
1996
Ryser J. P. | Pittet J. P.
Disinfection of soil with water vapour appears to be quite efficient in reducing the pressure of pathogens in greenhouses. During this operation the vapour is converted into about 50 l water per square metre, which may lead to nutrient leaching during the subsequent drainage. The amount of drained water is closely related to the initial soil matrix potential. The amount of nutrients removed is specific to each element: for an identical amount of water, more sulphates than phosphates are lost. The rate of nutrient loss also depends on the amount of drained water and the initial amount of nutrients in the soil. Nitrite-nitrogen has been detected in the drainage water during disinfection. We have observed that the presence of nitrite is related to a temporary anoxic situation in the soil.
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