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Ponte Academic Journal
Apr 2016, Volume 72, Issue 4

MODELING OF PROCESSES OF WASHING THE HUMUS OUT OF ROOT ZONE OF DARK-CHESNUT SOILS

Author(s): Bekbayev Rakhym ,E.D. Zhaparkulova, Z.Mussin, O. Karlykhanov, N. Bekbayev, K. Kurmachev, G. Toktaganova

J. Ponte - Apr 2016 - Volume 72 - Issue 4
doi: 10.21506/j.ponte.2016.4.32



Abstract:
It is established that the amount of leached humus influences the speed and volume of infiltration water in root layer of soil. On the basis of experimental data, a mathematical model of washed off the humus from the root layer of soil was developed to estimate the intensity of soil degradation. The maximum average values of washed out humus was obtained in the option where irrigation norm was 250 m3/ha day. In this option, the average concentration of leached humus amounted 0,106 g/l. In the option, where the irrigation norm was 500 m3/ha, mineralization of washed humus has decreased on average by 0.008 g/l or 7.5% compared with the first option. At irrigation norm of 1000 m3/ha, the intensity humus leaching, compared with the 1st option was smaller to 0,014 g/l or 13.2 %. In the option, where the irrigation norm was 2000 m3/ha, the values of humus leaching reached 0,023 g/l, which is 21.7 % less than option 1. The decrease in the intensity of humus leaching in this option, compared with options 2 and 3, re-spectively, amounted to 0.015 and 0.009 g/l, or 15.3 and 9.8%.
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