Plant and Soil Science

An important role in the composition of humus belongs to labile organic substances (LOS), which are biochemically active, containing elements of food available to plants and can directly affect crop yields. In soil samples of a stationary experiment, including various soil tillage and fertilizer systems, the humus content was determined by the method of Tyurin in the modification of Simakov and the content of labile organic substances. The aim of the studies was to determine the effect of tillage and fertilization on the parameters of the humus condition of typical chernozem. It has been established that fertilizer systems had a greater effect on the content of humus compared to tillage systems. On the non-plowing tillage both on the control and on the variant N60P40R60, the humus content was higher and was 3.54 and 3.67%, respectively, relative to plowing in the 0-30 cm layer. The use of non-plowing tillage brought the profile redistribution of the upper soil layer closer to the virgin state of the chernozem typical. The positive effect of fertilizer and non-plowing tillage on the amount of LOS in chernozem typical. On average, in the 0-30 cm layer, the content of the LOS during plowing without fertilizer was 0.026%, on the N60P40R60 variant, 0.086%; 0.093 on non-plowing tillage without fertilizer and 0.116% on the fertilized version, while on the virgin land the humus content became 0.103%. I t is promising to establish the role and optimal VOC level to restore fertility chernozems and high performance crop.

humus, labile organic matter, typical black soil, tillage, fertilizers