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Changes in the Soil Microbial Hydrolytic Activity and the Content of Organic Carbon and Total Nitrogen by Growing Spring Barley Undersown with Red Clover in Di_erent Farming Systems

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Kuht, Jaan; Eremeev, Viacheslav; Talgre, Liina; Alaru, Maarika; Loit, Evelin; Maeorg, Erkki; Esmaeilzadeh-Salestani, Keyvan and Luik, Anne (2019) Changes in the Soil Microbial Hydrolytic Activity and the Content of Organic Carbon and Total Nitrogen by Growing Spring Barley Undersown with Red Clover in Di_erent Farming Systems. Agriculture, 9 (7), pp. 1-9.

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Online at: https://www.mdpi.com/2077-0472/9/7/146

Summary

The experiments were carried out during 2012–2017. There were 5 crops in rotation: Red clover, winter wheat, pea, potato and barley undersown (us) with red clover. There were 5 cropping systems in the experimental setup: 2 conventional systems with chemical plant protection and mineral fertilizers; 3 organic systems which included winter cover crops and farm manure. The aim of the present research was to study the e_ect of cultivating barley undersown with red clover and the preceding winter cover crop on the soil microbial hydrolytic activity, the change in the content of soil organic carbon (SOC) and total nitrogen (Ntot) compared to the same parameters from the field that was previously under potato cultivation (forecrop of barley in the rotation). The cultivation of barley with red clover (barley (us)) had a positive impact on the soil micro-organisms activity.
In organic systems the soil microbial hydrolytic activity increased on average by 19.0%, compared to the conventional systems. By cultivating barley (us) the soil microbial hydrolytic activity had a significant e_ect on the SOC content only in organic systems where winter cover crops were used. Organic cultivation systems had positive impact on the soil nitrogen content; Ntot in samples taken before sowing the barley (us) was higher by 17.4% and after the cultivation of barley (us) by 14.4% compared to conventional systems, as an average of experimental years. After cultivation of barley (us) with red clover the soil microbial hydrolytic activity had no e_ect on the soil Ntot content in either cultivation systems.


EPrint Type:Journal paper
Keywords:cropping systems; organic farming; barley; red clover; soil hydrolytic activity; soil organic carbon; total nitrogen
Subjects: Soil > Soil quality > Soil biology
Crop husbandry > Soil tillage
Farming Systems > Farm nutrient management
Research affiliation: Estonia > Estonian University of Life Sciences
European Union > CORE Organic Plus > FertilCrop
H2020 or FP7 Grant Agreement Number:618107
ISSN:2077-0472
DOI:10.3390/agriculture9070146
Deposited By: Peetsmann, Ms Elen
ID Code:37831
Deposited On:01 Apr 2020 10:09
Last Modified:02 Apr 2020 08:50
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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