Productivity of Pear Plantings Depending on the Content of Main Macroelemants (n, p, k) in the Soil after Optimized Fertilization

摘要

The results of changes in the yield and quality of pear fruit on the clone rootstock of A quince grown again after a logged-off old pear tree garden using optimum levels of N and K_2O content in the rooting soil layer in the presence of P_2O_6 in it more optimal level without fertilizers are given Norms of nitrogen and potassium fertilizers are calculated on the basis of agrochemical soil analyzes in such quantities to. compensate for the Jack of N-NO_3 (in terms of nitrification capacity of the soil) and available K_2O forms for plant nutrition and bring their content to the optimal levels determined by studies for apples and recommended for pears. The studies have established s that pear fertilizers are calculated on the basis of agricultural chemical analysis of soil with fertilizer standards containing only those elements and in such quantities that are not sufficient in the soil for optimal nutrition of trees, contribute to a significant increase in the yield of fruits with less technologicalcosts. Accordingly, higher profitability of production and safety for the ecological state of the environment are ensured, compared to the annual introduction of the recommended norm of N_(90)P_(80)K_(90).