Implications of soil nitrogen enhancement on the yield performance of soybean (Glycine max) in cadmium-polluted soil.

The growth, development and yield of important crop plants like soybean (Glycine max) are constantly under threat by continuous inputs of cadmium in the biosphere as a result of various industrial activities. This study investigated the level to which, addition of nitrogen fertilization can enhance plant survival, growth and yield development in a cadmium-polluted. Three accessions of Glycine max (TGm1, TGm2 and TGm3) were sown in a 12 mg/kg-cadmium polluted, which was thereafter amended with urea (FU), ammonia (FA), and ammonium nitrate (FN) singly and in combinations of equal proportions. A non-fertilized Cd-polluted soil and a general control constituted the negative and positive controls. Results showed that although N application did not enhance yield dispositions of soybean in Cd polluted soil, significant impact on vegetative development was noteworthy. Compared to yield of control plants, cadmium pollution imposed a 26.1% reduction in per plant yield in TGm-1, compared 1.71% in TGm-3. Generally, addition of nitrogenous fertilizer further suppressed crop yield by as much as 80% in plants sown in cadmium-polluted soil. However, application of ammonia fertilizer to TGm-2 improved its yield performances in the cadmium-polluted soil.

Implications of soil nitrogen enhancement on the yield performance of soybean (Glycine max) in cadmium-polluted soil

The growth, development and yield of important crop plants like soybean (Glycine max) are constantly under threat by continuous inputs of cadmium in the biosphere as a result of various industrial activities. This study investigated the level to which, addition of nitrogen fertilization can enhance plant survival, growth and yield development in a cadmium-polluted. Three accessions of Glycine max (TGm1, TGm2 and TGm3) were sown in a 12 mg/kg-cadmium polluted, which was thereafter amended with urea (FU), ammonia (FA), and ammonium nitrate (FN) singly and in combinations of equal proportions. A non-fertilized Cd-polluted soil and a general control constituted the negative and positive controls. Results showed that although N application did not enhance yield dispositions of soybean in Cd polluted soil, significant impact on vegetative development was noteworthy. Compared to yield of control plants, cadmium pollution imposed a 26.1 % reduction in per plant yield in TGm1, compared 1.71 % in TGm3. Generally, addition of nitrogenous fertilizer further suppressed crop yield by as much as 80 % in plants sown in cadmium-polluted soil. However, application of ammonia fertilizer to TGm2 improved its yield performances in the cadmium-polluted soil

EFFECTS OF NITROGEN AND ZINC TREATMENTS AT DIFFERENT DOSES ON MAIZE YIELD AND YIELD COMPONENTS UNDER KAHRAMANMARAŞ CONDITIONS

This study was carried out in 2019 in Kahramanmaraş University Field Crops Department to determine nitrogen and zinc fertilizer needs of maize plants in Kahramanmaraş Region. Experiments were conducted in split-plots design with 3 replications. Soil nitrogenous fertilizer (Urea) treatments were arranged as: 0 kg/da (N0), 15 kg/da (N15), 30 kg/da (N30). Foliar zinc treatments were arranged as 0 ppm (Zn0), 2500 ppm (Zn5), 5000 ppm (Zn10). Dekalp DKC6890 hybrid maize variety was used as the plant material of the experiments. Present findings revealed that nitrogen and zinc treatments had significant effects on the first cob height, cob length, cob thickness, number of rows per cob, number of kernels per cob and kernel yield of maize plants, but the effects of nitrogen and zinc treatments on plant height and thousand kernel weight were not found to be significant.

Response of paddy field cyanobacterium, Westiellopsis prolifica Janet to the inorganic nitrogenous fertilizers

Cyanobacteria are prokaryotic nitrogen fixing microorganism which played a significant role in the nitrogen fixation and contributed much to the submerged rice cropping system of the world. It can luxuriantly flourish in paddy fields and providing nitrogen as well as various growth promoting substances that influence the growth of paddy plants. India, being an important rice producing country of the world, depends upon various inorganic fertilizers for rice cultivation. The heterocystous cyanobacterium, Westiellopsis prolifca is a common inhabitant in most of the paddy fields of Kerala. The growth and other biochemical parameters upon the growth of cyanobacterium were assayed. The nitrogenous fertilizer ammonium sulphate influences the chlorophyll-a synthesis, protein content and growth rate. But the ammonia excretion was drastically reduced in cyanobacterial cultures upon the treatment with inorganic fertilizers.