ALLOCATION OF HYDROLYABLE NITROGEN IN THE SOIL ROOT ZONE UNDER THE INFLUENCE OF DRIP IRRIGATION AND FERTIGATION IN THE INTENSIVE APPLE ORCHARD | Распределение легкогидролизуемого азота в корнеобитаемом слое почвы под влиянием капельного орошения и фертигации в интенсивном саду яблони
2015
Kuzin A. I. | Trunov Y. V. | Solovyev A. V. | Pugachнev G. N.
Nitrogen supply of soils is an important factor in the successful cultivation of agricultural crops. Nowadays, in the Central Black Earth region there are planted orchards with high density of trees, with installed systems of drip irrigation and fertigation. Such orchards are relatively new, particularly in this region. Fertigation ambiguous effects on soil structure and its content of nutrients, especially hydrolysable nitrogen. Therefore, the study of the distribution of hydrolysable nitrogen in the soil under the influence of fertigation and drip irrigation is important. The aim of our research was to investigate the distribution hydrolysable nitrogen in the root soil layers 0-20, 21-40, 41-60, 61-80 cm. Investigations were carried out according to conventional methods. In these layers of the soil, we have determined the content of hydrolysable nitrogen and yield. As a result, we have found that in variants with fertigation were the highest yield. In addition, with fertigation it was noted higher content of hydrolysable nitrogen in the soil as compared with the control without irrigation, especially in the deep layers 21-40; 41-60 and 61-80 cm. It was also noted increase of hydrolysable nitrogen in the soil along the periphery of the wetting
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