NITROGEN EFFECIENCY IN BARELY UNDER SALINE-SODIC CONDITIONDS AS AFFECTED BY UREA, COMPOST AND BIOFERTILIZER (Rhizobium radiobacter sp.)

Abstract

Effects of application of different rates of urea, biofertilizer, (Rhizobium radiobacter sp.) as salt tolerant PGPR strain and compost on barley (Hordeum valgare L. cv. Giza 126) were studied on a saline-sodic sandy loam soil at Gelbana village, Northern Sinai Governorate, Egypt during the two successive winter seasons of 2011/2012 and 2012/2013. The studied treatments were No, control (non fertilized), N1, mineral-N (119 kg N ha-1), N2, mineral-N (179 kg N ha-1), equivalent 0 , 50 and 75% from recommended rate for barley, biofertilizer (Bio), biofertilizer (Bio) + N1, biofertilizer (Bio)+ N2, compost, compost + N1 and compost + N2. The results could be summarized as follow: available N, P, K, Fe, Mn and Zn concentrations were significantly increased due to the above mentioned treatments. On the other hand, the electrical conductivity (EC dSm-1) and soil pH values decreased due to these treatments. The applied urea, compost and biofertilizer as well as their combinations significantly, increased straw and grain yields as well as N, P, K, Fe, Mn and Zn contents in straw and grains, grain weight spike-1 and 1000-grain weight in the two growing seasons, except grains spike-1 which did not reach the level of significantly in the first season. The highest values of nitrogen use efficiency (NUE), nitrogen agronomic efficiency (NAE) and apparent nitrogen recovery (ANR) were obtained due to the treatment Biofertilizer + N1 (119 kg N ha-1). The higher rate of N fertilization i.e.,179 kg N ha-1 combined with compost was of superior effect on improving soil chemical properties and increasing barley production, protein content and nutrient uptake as compared to the other treatments. This was found to be true for straw and grains. Thus, it is suggested to use a combination of organic and inorganic fertilizers to achieve the highest yield without negative effect on grain quality.

Effect of Mineral Fertilizers and Biofertilization on some Soil Properties and Faba Bean Productivity under Saline Soil Conditions

“…These results are in a harmony with those obtained by Abdel Lattif (2007) and Poraas et al, (2009). These results are in agreement with those obtained by Shaban et al (2012) and Helmy et al (2013a).…”

Nitrogen Efficiency for Wheat as Affected by Ammonium Sulphate and Compost in Combination With Some Bio Amendments Under Sandy and Calcareous Soil Conditions

“…The highest NUE value 12.9 g gP -1 P was obtained in calcareous soil when plants treated with 50 mg N as AS kgP -1 P soil + Mic., while the highest NUE value 8.38 g gP -1 P was obtained in sandy soil when plants sprayed with compost tea plus the low rate of AS, N2 (50 mg N kgP -1 P soil) which increased the efficiency use of AS fertilizer by 71.0% compared with the treatment received AS (50 mg N kgP -1 P soil) solely. These results are in agreement with those obtained by Helmy et al (2013).…”

Barley Productivity and Protein Content as Effected by fertilization Treatments under Calcareous Soil Conditions

“…For 1000-grain weight, data indicated that, the highest 1000-grains weight was recorded in plants treated with mineral nitrogen only with averages of 50.63 and 55.33 g in both seasons, respectively. These results were supported by those obtained by Helmy et al (2013)who reported that, application of 119 kg N. ha -1 and 179 kg N. ha -1 increased1000-grain weight by 22.0% and 35.8% in 2011/2012 and18.6% and 30.7% in 2012/2013, respectively. These results showed the positive effect of urea, which stimulates the decomposers of organic matter thereby, releases the nutrients in an available form.…”

“…This result could be attributed to the role of nitrogen on barley growth and yield components which in turn reflected on straw and grain yields fad -1 . Helmy et al (2013) noticed that the treated Quinoa plants with nitrobin alone induced significant decreases in seed yield/plant in both growing seasons. These results were supported by Filho et al, (2013)whose reported that, A. brasilense alone was not effective enough to replace the entire nitrogen fertilization but, combination with nitrogen fertilization, made it possible to give the highest yields of wheat grains.…”