Effect of Nitrogen Fertilization and Application of Soil Properties Improving Microbial Preparations on the Content of Mineral Nitrogen in Soil After Spring Wheat Harvesting

Abstract

The effect of nitrogen dose and application of soil properties improving microbial preparations on the content of mineral nitrogen in soil after spring wheat harvesting were evaluated in a three-year field experiment. The investigations were conducted under conditions of Luvic Chernozem. Diverse nitrogen fertilization (0, 40, 80, 120 and 180 kg. ha-1) was applied and microbial preparations: Proplantan AM, Effective Microorganisms EM and UGmax Soil Fertilizer. The content on N min in the soil after wheat harvesting, particularly in the upper layers of the soil profile was growing with increasing nitrogen fertilization level. The amount of nitrate nitrogen in the soil after harvest plants was below the average content of N-NO3 for this category of agronomic soil in Poland. Bigger quantity of mineral nitrogen in soil after plant harvesting than before their sowing was registered only on the obejcts receiving 160 kg N. ha-1 in the years characterized by a similar to multiannual average amount and distribution of rainfall during the period from April to June. Microbial preparations Proplantan AM and Effective Microorganisms EM caused a significant decrease in nitrate and ammonium nitrogen in the 0-30 and 30-60 cm soil layers.

Evaluating the Effect of Bacterial Inoculation and Fertilization on the Soil Nutrient Status of Coal Mine Soil by Growing Soybean (Glycine max) and Shrub Lespedeza (Lespedeza bicolor)

“…These rhizobia bacteria remove N from air and transform it into other form of N called ammonia (NH 4 + ) which can be used by plants [25]. No significant difference was found in increasing NH 4 + -N between fertilization and bacterial inoculation for soybean, and low significant difference between the same treatments for shrub lespedeza, because fertilization also might cause an accumulation of NH 4 + -N (but less than NO 3 − -N) in the soil profile [26], but it was significantly lower in the control for both plants than other treatments, due to the absence of additional nitrogen sources. Cakmakci et al [27] showed a significant increase of NH 4 + -N concentration in the soil of barley plant after 30 days of inoculation and fertilization.…”

Improving soil ecology when applying bacterial fertilizers

“…Bacterial preparations are able to absorb atmospheric nitrogen, produce physiologically active substances, and inhibit the development of pathogenic microflora. The use of bacterial fertilizers improves plant growth by reducing the stressful influence of the environment (unfavorable conditions), contributes to the fullest disclosure of the potential of the variety, which relates to both quantitative and qualitative indicators of agricultural products [1,2,3].…”

Performance of One Potato Plant as Influenced by Soil Conditioner Ugmax

“…Intensification of agriculture needs various solutions to improve physical and chemical soil properties [1,5], increasing plant resistance to biotic and abiotic stresses [11,15] and, as a result, obtaining higher yields of better quality [10,12,13]. Recently, an application of stimulants, bacterial inoculants, effective micro-organisms and soil conditioners in plant production have been gaining popularity [8,14,17].…”