The Effect of Fertilizers in Amidohydrolases enzymes in sunflower (Helianthus annuus) Rhizoshper

To study the enzymes activity for (Amidase, Urease, L-Asparaginase, L-Glutaminase and L-Aspartase) in sunflower plant rhizosphere in two different textures and the effect of the fertilizers kinds (mineral fertilizer, organic fertilizer and biofertilizer) in enzymes activity, two sites were chosen, the first was clayey silt texture and the second was sandy loam texture were fertilized in one level for every kind of fertilizers. The mineral fertilizer (160N kg.h-1 were added in two times before the cultivated and the second before flowering and 80 kg. P2O5 kg.h-1 were added before cultivated and 80kg K2O kg h-1 were added before cultivated). Organic fertilizer (poultry manure) was added as one level 10 Ton.h-1 and the bio fertilizer (Mikro-kondi) were added spraying 5 letter.h-1 in two times when start of vegetation about (6-8) leaves and the second spray before flowering about 4 weeks after the first treatment. <br /> The results were summarized as:<br /> • Increasing of enzyme activity for all enzymes in rhizosphere than the bulk soil.<br /> • The enzymes activity in clayey silt texture were increased than the enzymes activity in sandy loam texture in all fertilized treatments.<br /> • The organic fertilizer has high values than the author fertilizer kinds in enzymes activities and it arranged as follow:<br /> Organic fertilizer  biofertilizer  mineral fertilizer  control<br /> The highest enzymes activities values were in Amidase and the lowest were in L-Asperginase and it arranged as follow:<br /> Amidase  L-Aspartase  Urease  L-Glutaminase  L-Asparaginase

Abstract licence: CC BY

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