This research carried out in Al- Bassa village at Lattakia province during 2013-2014, to determine the effects of increasing rates of boron and zinc fertilization by foliar spraying, on root nodulation and seed yield of broad beans (Viciafaba L.). Se
eds were planted in plastic pots (15 kg capacity), filled with sandy-silty soil, characterized by its poor content of boron, and represents most of lands in the region. Boron and zinc were sprayed by five increasing concentrations (Bo, B25, B50, B75 and B100) and (Zno, Zn25, Zn50, Zn75, Zn10)on broad bean plants at 33 and 65 days post-emergent. Results showed that treatments high significance than control, in termsof root length witch the best treatment was B100Zn100with 31c.m, and 2.85 g for B75Zn75 as a wight of length, on the other hand the best treatment for number of nodules was B75Zn75, 179.03 c.m, B100Zn100 was the best for height of the plant with 100.20, for protein B100Zn100 the best with 37.4%, However, boron and zinc fertilization treatment B75Zn75 is the best, economically.
This study was conducted to evaluate the effect of seed Rhizobia-treating
and Cowpea severe mosaic virus (CPSMV) inoculation on bacterial nodulation
and nitrogen fixation in cowpea. CPSMV was isolated from infected plants,
College of Agriculture,
Abu-Ghraib, Baghdad, IRAQ, the Rhizobia was isolated
from nodules on roots of cowpea plants. The plants were inoculated by the
virus 2 weeks after germinations. Nodules on roots of Rhizobia-treated plants
were formed while no nodules were observed on non-treated ones. The mean
number of nodules was 24.93\ plant on virus inoculated plants compared to
59.86 nodules\plant on non-inoculated ones. Significant reduction in nodules
weight was induced by the virus, 0.62 gm on the virus inoculated plants
compared to 2.13gm on non-inoculated ones. It has been found that the
Rhizobia induced significant increase in nitrogen percentage at p=0.05 in the
foliage, 1.29% in plants non-treated with Rhizobia non-inoculated by the virus
compared with 2.502% in Rhizobia treated-virus inoculated plants and 2.550%
in Rhizobia treated non inoculated plants. The virus caused an increase in
nitrogen percentage, 1.877% compared to 1.29% in non-inoculated plants. The
Rhizobia caused an increase in pods number\plant, seed number\plant, and seed
dry weight (gm)\plant, 25.6, 114, 32.4 compared to 12.8, 70.6, 8.7 in non-treated
plants respectively. The treatment of virus inoculated plant by Rhizobia
induced a significant increase in these values, except with nitrogen percentage
in seeds, 16.4, 84.6, 10.4, 4.3 respectively.
