ABSTRACT
This study was carried out to develop a technique for improving the
productivity of some summer fodder crops under salinity stress
condition. Field analysis and estimations were done for two progressive
seasons (1026 and 2017) at South Sinai Reaserch Station, Ras Sudr,
Desert Research Center, to consider the impact of biofertilizer
application and compost rates in enhancing some summer fodder crops.
The utilized biofertilizers were A. chroococcum and Azospirillum
brasilense single and mixed treatments with two compost rates(10 and
20 m3/Fed.).
Analysis of the manure, the soil microbiological properties and
physicochemical analysis of compost showed a highly efficient compost
productivity was obtained with narrow C/N ratio and rich microbial
counts. Soil microbial properties and production of some fodder crops
(Maruit 1 , Black suddan grass and Pearl millet) irrigated with saline
water were measured. Obtained results showed that, there was a
superiority of mixed biofertilization treatments over all individual with
20m3 followed by mixed with 10 m3 compost when compared with all
individual treatments. Increase in compost rate increased significantly all
the studied parameters. A. chroococcum and Azospirillum brasilense
played an energizing role especially with application of compost. Also,
results indicated that, the three studied Sorghum varieties differed
significantly in their responses to biofertilization treatments and organic
matter (compost levels). Highest obtained values of all parameters were
recorded with Maruit-1 followd by pearl millet. Also, mixed treatments
with Azotobacter chroococcum and Azospirillum brasilence recorded the
highest activity to alleviate salt stress compared with single and control.
It can concluded that, organic matter application at 10 m3/fed with mixed
biofertilization treatments improve yield, its components and stimulate
microbial and enzymatic activity in rhizosphere of the studied fodder
crops under salinity stress compared with all the other treatments.