A long‐term no‐tillage system can increase enzymatic activity and maintain bacterial richness in paddy fields

Bibliographic Data

ID21647940
AuthorsFilipe Selau Carlos (0000-0002-3068-0399, Department of Soil Science Federal University of Pelotas Pelotas Brazil, corresponding author), Naihana Schaffer (Department of Soil Science Federal University of Rio Grande do Sul Porto Alegre Brazil), Elio Marcolin (Soil and Water Department Rio Grande do Sul Rice Institute Cachoeirinha Brazil), Rodrigo Schmitt Fernandes (Department of Soil Science Federal University of Rio Grande do Sul Porto Alegre Brazil), Roberta Mariot (Department of Soil Science Federal University of Rio Grande do Sul Porto Alegre Brazil), Roberta Fogliatto Mariot (0000-0001-5784-3461, Universidade Federal do Rio Grande do Sul), Michael Mazzurana (Department of Soil Science Federal University of Rio Grande do Sul Porto Alegre Brazil), Luiz Fernando Würdig Roesch (0000-0003-1450-8828, Federal University of Pampa São Gabriel Brazil), Bruno Levandoski (Lutheran University of Brazil Canoas Brazil), Flávio Anastácio de Oliveira Camargo (0000-0003-1080-0549, Department of Soil Science Federal University of Rio Grande do Sul Porto Alegre Brazil)
Year2021
Volume32
Issue6
Pages2257-2268
Publication date2021-04-15
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.3896
OpenAlexW3121192220
LanguageEN
Citations received1
References cited49

Soil management systems cause many changes in the microenvironment that directly affect activity and diversity of microorganisms. In lowlands, there is a gap in relation to the adoption of no‐tillage (zero‐tillage) and the impact it has on soil under cultivation of irrigated rice. This study, an in‐field experiment, evaluated the microbial enzymatic activity and diversity in an Entisol cultivated with rice under different managements for 22 years. The experiment started in the 1994/95 growing season, and the treatments were no‐tillage, conventional, and pregerminated management systems. After 22 years, the data obtained on most of the evaluation dates indicated that no‐tillage increased microbial biomass carbon (+45%), microbial biomass nitrogen (+54%), and basal respiration (+54%). No‐tillage compared to management under soil tillage (pregerminated and conventional tillage) increased the activity of β‐glucosidase (+43%), acid phosphatase (+68%), diacetate fluorescein (+34%), and urease (+96%). The enzyme activity was correlated with the soil organic carbon content and particulate fraction. Despite the relatively high enzyme activity with no‐tillage, bacterial richness was maintained in this soil management system. The Proteobacteria phylum has a greater abundance in the NT (43.2%) in relation to the CT (32.3%). Bacteroidetes phylum has a lower abundance in the NT (10.0%) in relation to the CT (15.2%). The Verrucomicrobia phylum has a greater abundance in NT (8.9%) in relation to CT (4.9%). The results suggest that no‐tillage is an important management tool in the recovery of irrigated rice areas whose soil has undergone microbiological degradation

Agronomy · Biology · Conventional tillage · Soil carbon · Soil Quality · Soil water · Species richness · Tillage · Microbial Community Ecology and Physiology · Rice Cultivation and Yield Improvement · Soil Carbon and Nitrogen Dynamics · Ecology

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