تأثير إضافة سماد البيوغاز مع الأسمدة المعدنية على امتصاص نباتات الذرة الصفراء (.Zea Mays L)‎ لبعض العناصر الغذائية الكبرى

الملخص EN

The repeated use of agricultural lands and adoption of intensive cultivation system led to severe reduction of the soil fertility and productive capacity.

The biogas slurry which resulting from anaerobic digestion of agricultural wastes have been renowned as an ecofriendly organic fertilizers.

The digestate can be a useful source of plant nutrients in addition to being an important means for preserving soil fertility in a sustainable agriculture system.

A field experiment by cultivating hybrid yellow maize (Ghouta82) was conducted in the Agricultural Scientific Research Center in Tartous Governorate, aiming to study the effect of different levels application of biogas digestate (Resulting from the joint digestion of Olive Mill Wastewater with cow manure) combined with mineral fertilizers on dry weight of plant shoot and content of (N-P-K) nutrients at tasseling stage (VT).

The experiment was carried out according to the random block design which constitutes of 11 treatments and 3 replications.

The treatments were three levels of biogas digestate (10, 15 and 20 litter / m²) and three levels of mineral fertilizers (25, 50 and 75%) of the fertilizer recommendation for the maize.

The results showed a positive effect for the used digestate on dry matter accumulation and efficiency of the mineral fertilizers added to a loamy soil.

A significant increase in dry weight of plant shoot was found when applying biogas digestate at rate of (20 litter / m²) with the third level of mineral fertilizers (treatment : 20 litter/m² + 75% fertilizer recommendation).

The highest shoot content of (N-P-K) nutrients was observed in treatment (20 litter / m² + 50% fertilizer recommendation).

The study demonstrated the possibility of using biogas digestate as a supplementary fertilizer and 50% of recommended fertilizers dose for maize can be replaced with biogas digestate.