Abstract
The paper presents the results of stationary multifactor field experiment on study of the mutual impact of various systems of soil deep and surface tillage in combination with various levels of organic and mineral fertilizers application on crop rotation performance, as well as on a number of agrochemical indicators of black soil fertility. Researches were carried out as a stationary field experiment on the experimental field of Bila Tserkva National Agrarian University in 2013-2018. During the crop rotation in all the studied tillage methods, especially mouldboardless and disking tillage, the hydrolytic acidity of the arable layer increased with increase in fertilizer rates, and the amount of bases absorbed, saturation degree, level of exchangeable calcium and magnesium cations decreased, but in most cases these changes were not significant. Systematic mouldboardless and disking tillage enhance the topsoil heterogeneity in relation to agrochemical indicators of its fertility. Heterogeneity increases with increase in the level of applied fertilizers. With the mouldboard tillage during the crop rotation period at unfertilized areas, the largest part of humus loss in the arable layer is observed in the top, and the smallest - in its bottom parts; the opposite pattern was observed on fertilized areas at the highest rate. With mouldboardless and disking tillage, directly opposite patterns were observed in comparison with mouldboard tillage. An annual application of 8 t/ha of manure + N76P64K57 stabilizes the humus state of the arable soil layer when carrying out differentiated and disking tillage in crop rotation. Fertilization rate of 12 t/ha of manure + N95P82K75 for these tillage options a significant increase in humus and total nitrogen reserves is provided.
Highlights
Almost 65 % of the total area and 72.7 % of arable land in Ukraine are black soils
The largest annual losses of it in Ukraine occurred in the 60-80s of the twentieth century, reaching 0.55-0.60 t/ha. This is due to the intensification of the agricultural industry, in particular, unreasonably high proportion of row crops and energy-intensive measures of mechanical soil tillage
The annual increase of humus content in the areas fertilized with 12 t/ha of manure + N95P82K72 and 16 t/ha of manure + N112P100K86 was respectively: under mouldboard tillage - 0.34 and 0.54 t/ha, under mouldboardless - 0.20 and 0.46, differentiated - 0.66 and 0.92, disking - 0.48 and 0.72 t/ha (Table 2)
Summary
Almost 65 % of the total area and 72.7 % of arable land in Ukraine are black soils. The share of Ukrainian black soil is 13-14 % from European and 6-8 % from world’s reserves [1].The integral indicator of soil fertility, which most objectively characterizes it, is the content of humus in it. Almost 65 % of the total area and 72.7 % of arable land in Ukraine are black soils. The largest annual losses of it in Ukraine occurred in the 60-80s of the twentieth century, reaching 0.55-0.60 t/ha. This is due to the intensification of the agricultural industry, in particular, unreasonably high proportion of row crops (especially sugar beet and corn) and energy-intensive measures of mechanical soil tillage. During 2006-2010 the humus balance in soils was severely deficient: annual losses ranged from 0.40 t/ha in 2008 to 0.53 t/ha in 2010, and the average value in Ukraine was 0.46 t/ha [1]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Proceedings of the National Academy of Sciences of Belarus. Agrarian Series
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
