THE EFFECT OF POULTRY WASTES, UREA AND INOCULATION WITH PSEUDOMONAS FLUORESCENS ON ORGANIC CARBON, TOTAL NITROGEN, AND GROWTH TRAITS OF VIGNA RADIATA L

Investigating the effect of the application of different sources of fertilizers on organic carbon, total nitrogen, and some characteristics of the growth of mung bean (Vigna radiata. L) in both of the rhizosphere and bulk soils, a pots experiment was conducted in the greenhouse canopy in one of the fields affiliated to the Faculty of Agriculture the University of Qadisiyah during the summer season of 2018. The cultivation soil was a silty loam. Local variety mung bean seeds (Khedrawi) were planted. The treatments of the study were as the fellow: two levels of nitrogenous mineral fertilizer (urea) M1 and M2 (20 and 40) kg.N. h-1, respectively, one level of organic fertilizer (poultry waste) (10 tons.h-1), a single level biofertilizer with Pseudomonas fluorescens bacteria, control treatment, and their interaction treatments. The experiment was designed following the Completely Randomized Design (CRD) with six replicates and the means were compared according to the Least Significant Difference (L.S.D) test at a probability level (=0.05). The assay of organic carbon, total nitrogen, and some growth characteristics of the mung bean plant in the soil of the root surrounding (rhizosphere) and the distant soil (bulk soil) was estimated for all study treatments after 30 days of planting. The same measurements were repeated with some measurements of the vegetative and root growth characteristics after 60 days of the planting date. The results are summarized the following: The treatment of poultry residues (O) significantly increased in the amount of organic carbon in comparison with the other individual treatments for the period of 30 days from planting compared to control treatment, which had the lowest value of organic carbon into the rhizosphere and bulk soils (14.67 and 13.35) g.kg-1.soil, respectively. According to the period of 60-days after planting date, the value of organic carbon for the two regions increased to (15.36 and 14.90) g.kg-1.soil, respectively. The treatment of bilateral overlap between poultry residue and biofertilizer with Pseudomonas fluorescens (OB) gave the highest significant increase in the amount of organic carbon for a period of (30) days of the planting date in both the rhizosphere and bulk soils compared with the individual treatments as they valued at (15.22 and 13.92) g.kg-1.soil. After the 60 days of cultivation, the amount of organic carbon in both soil regions of the rhizosphere and bulk soils increased to (16.00 and 15.16) g.kg-1.soil, respectively. The treatment of the overlap between poultry waste, inoculation with Pseudomonas fluorescens and urea at level II (OBM2) resulted in the highest significant increase in organic carbon for a period of (30) days after the planting date in both of the rhizosphere and bulk soils (16.30 and 15.26) g.kg-1.soil, respectively. According to the period of 60 days, the amount of organic carbon in the two regions increased (16.61 and 15.40) g.kg-1.soil, respectively, in comparison with the mono and bilateral treatments. The treatment of poultry residues (O) significantly increased the total nitrogen amount over the rest of the mono treatment for the period of (30) days of cultivation compared to the control that had the lowest total nitrogen value for the region of the rhizosphere and bulk soils (1.89 and 1.48) g.kg-1.soil, respectively. After the 60 days, the total nitrogen value for the two regions increased, as it reached (2.61 and 1.62) g.kg-1.soil for the rhizosphere and bulk soils, respectively. The treatment of bilateral interference between poultry and urea residues at the second level (OM2) resulted in the highest significant increase in the total nitrogen amount for the 30 days after planting for the region of the rhizosphere and bulk soils compared to the mono factors (1.55 and 1.49) g.kg-1.soil. According to the 60 days of the planting date, the total nitrogen amount for the two regions increased to (2.29 and 1.59) g.kg-1.soil, respectively. The treatment of the interaction between poultry residues and the biological vaccination with Pseudomonas fluorescens and urea at level II (OBM2) resulted in the highest significant total nitrogen increase for the period of (30) days from the planting date in the rhizosphere and bulk soils (2.03 and 1.81) g.kg-1.soil, respectively. In a period of 60 days, the total nitrogen amount increased for both regions, as it reached (2.53 and 2.50) g.kg-1.soil, respectively, in comparison with the mono and bilateral 3878 Luma S. Al-Taweel and Naseer Jawad Kazim