Impacts of Cyanobacteria and Bradyrhizobium Inoculation on Lupine Plants Under Different Nitrogen Rates in Sandy Soil

Abstract

A field experiment was conducted in sandy soil at Ismailia Agricultural Research Station, (Ismailia Governorate, Egypt, in two successive winter seasons of 2015/2016 and 2016/2017. The experiment aimed to study the response of lupine plants (Lupinus albus L.) variety Giza 2 to cyanobacteria applied with different methods under different nitrogen fertilizer rates and inoculated with rhizobia. Results revealed that application of cyanobacteria generally increased the mean values of nodules number, dry weight of nodules and shoot dry weight of lupine plants, nitrogen uptake, biological activity of the soil rhizosphere lupine plants, yield, yield components and seed protein content as compared to those recorded by the control treatment without cyanobacteria. Increasing nitrogen rates decreased the mean values of both nodules number and dry weight of nodules. On the contrary, increasing nitrogen rate up to 100% of the recommended one increased all the other tested parameters. The highest values of these parameters were recorded when cyanobacteria were applied as dry + soaking combined with 75 % N rate expect for those of number and nodules the dry weight of nodules that gave their highest values when the lupine plants received the treatment of dry + soaking combined with 50 % N rate. In conclusion, the use of cyanobacteria along with rhizobia as renewable nitrogen source for lupine production can save 25% N from that required for lupine.

Effect of Blue-Green Algae in Soils with Different Texture: (a) on Enhancement Growth and Yield of Wheat Plant

“…Table (4) shows that the clay loam soil significantly increased the 1000-grain weight more than the sandy soil. The results were similar to those of Ghazal et al (2018), Abou Tahoun et al (2020), and Sadvakasova et al (2022. Grains weight (g pot -1 ) Data related to grains weight as affected by various nitrogen fertilizer levels, cyanobacteria strains and different soil types are presented in Table (5).…”

“…). AuthorsGhazal et al (2018), Abou Tahoun et al (2020), and Sadvakasova et al (2022 also published a similar result.…”

“…From the data in Table (2), it became a fact that the highest values of spikes number were recorded with clay loam soil under different nitrogen levels and different strains of cyanobacteria. At the same time, the lowest values were observed with sandy soil under different nitrogen levels and various strains of cyanobacteria, the authors of Ghazal et al (2018) Spikes dry weight (g pot -1 ) Data collected on spikes dry weight as affected by cyanobacteria strains with nitrogen levels are presented in Table (3). Considering the nitrogen level effect it was recognized that various nitrogen levels had a great effect on spikes dry weight.…”

Bioformulation of mineral solubilizing microbes as novel microbial consortium for the growth promotion of wheat (Triticum aestivum) under the controlled and natural conditions

“…Therefore, the search for sustainable solutions to reduce the negative consequences of intensive farming practices is a more difficult challenge. Hence, researchers worldwide are looking for alternate non-harmful fertilizer sources such as biofertilizers that can maintain the fertility of soils [ 4 ], and improve growth of plant and agricultural yield [ 5 ].…”