El-Zehery T.M. and Ghazi, A.A. ( 2016). Impact of biochar and biofertilizatin on guar plant (cyamopsis tetragonoloba l. Taub) and sandy soil fertility. Procedings of 1 th International Conference of Applied Microbiology – March 1-3: 49-61.
Abstract: Two pot experiments were conducted during the two successive summer seasons of 2013 and 2014 at a wire proof greenhouse of Sakha Agricultural Research Station, Sakha, Kafr El-Sheikh governorate, Egypt. The experiment aimed to evaluate the effects of adding different levels of biochar (w/w) (C0= without biochar, C1= 0.2% biochar and C2= 0.4% of biochar) with nitrogen fertilizer levels (N0=without nitrogen, N1= 30 kg N. fed -1, N2= 45 kg N. fed -1 and N3= 60 kg N.fed -1) on guar plant (Cyamopsis tetragonoloba l. taub) inoculated with Rhizobium isolate AZ2. Different characteristics such as N-uptake, yield and yield components of guar and the residual effect on some biochemical properties of sandy soil were studied. The experiments were conducted in a complete randomized block design with three replicates. Results indicated that nitrogen, phosphorus and potassium contents of guar plants after 60 days from transplanting significantly increased by the addition of 0.4% biochar+30 kg N fed -1 (T11) in sandy soil compared to control (without addition of biochar + without N fertilization or inoculation) (T1). The same trend was observed with N, P and K % in guar seeds at harvesting stage. Also, number of nodules, nodules dry weight, dry weight of plant after 60 days and dry weight of seed increased with (T11) compared with control (T1). In respect to quality parameters of guar such as protein % in seed and leg-hemoglobin, T11 was the best treatment. Nitrogen and phosphorus contents of soil increased significantly with T13 (0.4% biochar+60 kg N fed -1) compared to control whereas available potassium increased with T11. Also, catalase activity as a parameter for microbial activities gave the highest values with T11.
Keywords: (biochar, biofertilizer, guar plant, sandy soil, nitrogen fertilizer.)
