Scientific Journal of KubSAU

The article considers data obtained in long-term stationary experiment in Kuban state agrarian University, which was started in 1991 for old irrigated leached black soil of the central zone of the Krasnodar region. Studies were conducted in two rotations of seven-field grassy-grain-row crop rotation. The duration of irrigation - more than 30 years. It is established that long-term irrigation by sprinkling led to the soil over-compaction in both arable and subsurface layers. In the arable layer of 0-30 cm density of 0.14-0.17 g/cm3 exceeds the maximum allowable. We have noticed a sharp decrease in humus in the arable layer to 2.46-2.67 per cent. The weak acidification of the active root layer was noted, salt PH 5.0-5.3. In the soil-absorbing complex, the content of calcium decreases. It was found that the productivity of crops cultivated in the rotation of two rotations was greatly influenced by the system of basic soil treatment. In the first rotation, the decrease in productivity of cultivated crops against the background of the surface treatment system amounted to an average of 4.2% compared with deep: subsurface tillage and moldboard. In the second rotation after 14 years against the background of shallow surface treatment crop rotation productivity decreased by 11.2 %. The dependence of the fertilizer system and crop yield on the background of different main soil tillage is established. When using the mineral fertilizer system, the decrease in crop productivity, while minimizing the main tillage in the second rotation was 15.2%, and against the background of the organic fertilizer system by 12.7%. The deep sub-soil treatment provided an increase in the productivity of old irrigated leached black soil in the second rotation against organic fertilizers by 3.6%. Thus, the organic system of fertilizers on the background of deep main soil tillage allows to obtain crop yields in the framework of grassy-grain-row crop rotation on wetlands degraded old-irrigated lands is not lower than using high doses of mineral fertilizers

We have studied the effect of presowing enrichment with copper on the seed yield of rice. We have found optimum concentration of water solution of copper, which provides higher yields of seeds and evaluated the impact of the enrichment with copper on the growth processes in the plants of rice. The studies were conducted in elite seed-growing enterprise "Krasnoe" of All-Russian Research Institute of rice. It was found that for rice-growing farms of the Kuban region with the aim of increasing the quantity and quality of grain yield it is necessary to make sowing of rice seeds enriched with copper. This application should be carried out by wetting the rice seeds with 0,5 % water solution of the microelement with a semi-dry method, i.e. the rate of 10 liter working solution of copper in 1 ton of seed. The article proves the economic feasibility of enrichment of rice seeds with copper

In the article we consider various technologies of growing corn for grain with application of various backgrounds of soil fertility, fertilizer norms, system of plant protection from weeds, pests and diseases with the recommended soil cultivation