OPTIMIZATION THE APPLICATION TIME OF BRADYRHIZOBIUM SP 3339 AS LIQUID INOCULATION ON NODULATION EFFICIENCY AND PEANUT GROWTH IN NEWLY RECLAIMED SANDY SOIL

The present work was conducted as a field experiment to evaluate the effect of timing application of the specific rhizobial (Bradyrhizobim sp 3339) as liquid inoculation with peanut plants and its some hybrids on the nodulation process, plant growth and seeds quality. This experiments were conducted at Om Saber Village-Tahrir Region – El Beheira Governorate, Egypt (Latitude 30o.40 ́NLongitude 30o.33 ́E) (represented newly reclaimed sandy soil). The experiment was carried on two cultivars i.e. Ponch and NC of the peanut seeds. The planting date was at 15 Mai 2019. All plots of liquid inoculation of each sub treatment were continuously inoculated with its specific rhizobial strain during the first "FW"), second "SW" and at the third week "TW " after sowing, through the dripping system. All plots of solid inoculation of each sub treatment were inoculated with its solid specific rhizobial strain (Bradyrhizobim sp 3339) (Okadin) just before sowing. The studied treatments were arranged with the experimental unit in completely block design in three replicates. Five main treatments: Control treatment (without any inoculation), solid inoculation "SI " at sowing and liquid inoculation which carried out through (via drip irrigation "Fertigation") at three times i.e. at "FW", "SW " and " TW " from sowing, were used in this study. Nodulation, dry weights of the growing shoot plants, seed and straw yield, as well shoots at 60 old day and seeds content of N, P and K, were determined. The obtained results indicated that, the timing application of specific Rhizobial liquid inoculation (Bradyrhizobim sp 3339) of peanut plants, during FW and SW of sowing, were the most efficient inoculation treatments according to the high values of nodulation efficiency, macronutrients (N, P and K) concentrations and uptake by peanut plants (high significant) and produced the highest dry matter yields with all inoculation treatments compared to the control treatment.