Lina Maydaa⁽¹⁾ Alaa Khallouf*⁽¹⁾ Razan Karfoul⁽²⁾ Nisren Badour⁽²⁾ Mohammad Mayous⁽²⁾ and Haitham Eid⁽²⁾

(1). Natural Resources Research Administration, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria.

 (2). Tartous Agricultural Research Center, GCSAR , Damascus, Syria.

(*Corresponding author: Eng. Alaa Khallouf. E-Mail: alaakhallouf@gmail.com).

Received: 14/06/2019                               Accepted: 03/08/2019

Abstract

In order to study the effect of different levels of organic fertilizer (liquid biogas manure) and different levels of phosphorous fertilization in some soil fertility properties (OM%, N total%, Pav, K av), a field experiment was carried out at Zahid Research Station, Tartous Research Center, General Commission for Scientific Agricultural Research(GCSAR) during 2015 and 2016 seasons, including 12 treatments: 4 levels of liquid biogas manure (0-4-6-8 L. manure/m²) and two levels of phosphorous fertilizer (66.7% of P fertilizer recommendation, 100% of P fertilizer recommendation) with three replicates according to Randomized Complete Blocks Design. The results of the experiment demonstrated that the P2G3 treatment leaded to a significant increase in organic matter (2.772%), total nitrogen (0.1933%) and available phosphorus (13.667 mg/kg soil), and significant increase in the quantity of available potassium (313.7 mg/kg soil). In terms of production parameters, P2G3 showed a significant increase in vegetative production and yield of green pods (65.47 and 11.1 tons /ha), respectively, compared to the control, also of 100% fertilizer recommendation. The difference with P1G3 was not significant. Because of that the study concluded the addition of P1G3 to save 100 kg/ha of superphosphate fertilizers.

Key words: Phosphorous fertilizer, Soil fertility properties, Manure biogas, Peanut, Production traits.

Full paper in Arabic: PDF