Soil enzymatic activities and available P and Zn as affected by tillage practices, canola (Brassica napus L.) cultivars and planting dates

Omidi, Heshmat; Tahmasebi, Zeinaldin; Torabi, Hossein; Miransari, Mohammad

doi:10.1016/j.ejsobi.2008.05.002

Cited by 35 publications

(16 citation statements)

References 55 publications

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“…Higher soil phosphatase (ALP, ACP and PD) activities was detected in no-till treatments with the increase of residue input amounts (Figure 1), and another reason could be attributed to the sampling method or pretreatment which was conducted by removing all plant material from test soils. Phosphomonoesterase activity was higher in notill treatments (Omidi et al 2008), and increased along with the amount of residue application (Deng and Tabatabai 1997). Similar results were found in this study, our data also showed that ALP and ACP activities were higher in no-till treatments and increased along with the amount of residue inputs.…”

Section: Discussionsupporting

confidence: 81%

Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts

Wang¹,

Chen²,

Chen³

et al. 2011

Plant Soil Environ.

102

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The effects of tillage and residue input amounts on soil phosphatase (alkaline phosphomonoesterase ALP, acid phosphomonoesterase ACP, phosphodiesterase PD, and inorganic pyrophosphatase IPP) activities and soil phosphorus (P) forms (total P, organic P, and available P) were evaluated using soils collected from a three-year experiment. The results showed that no-till increased soil total and organic P, but not available P as compared to conventional tillage treatments. Total P was increased as inputs of crop residue increased for no-till treatment. There were higher ALP and IPP activities in no-till treatments, while higher PD activity was found in tillage treatments and tillage had no significant effect on ACP activity. Overall phosphatase activities increased with an increase of crop residue amounts. Soil total P was correlated negatively with PD activity and positively with other phosphatase activities. Organic P had a positive correlation with ACP activity, but a negative correlation with PD activity. Available P had no significant correlation with phosphatase activities. Our data suggests that no-till and residue input could increase soil P contents and enhance the activities of phosphatase.

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Section: Discussionsupporting

confidence: 81%

Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts

Wang¹,

Chen²,

Chen³

et al. 2011

Plant Soil Environ.

102

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show abstract

“…This results in an increased soil organic matter content in the topsoil, which in turn leads to higher microbial biomass and activity. This increase in organic matter content in the topsoil however is often offset with a decrease in lower soil layers (Dick 1992;Omidi et al 2008). Franzluebbers (2002) suggested using changes in soil organic C with depth rather than the total amount of soil organic C in the profile as indicators of tillage-induced effects on soil properties.…”

Section: Introductionmentioning

confidence: 99%

Short-term dynamics of soil carbon, microbial biomass, and soil enzyme activities as compared to longer-term effects of tillage in irrigated row crops

Geisseler

Horwáth

2009

Biol Fertil Soils

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“…1). In contrast, several studies suggested that enzymatic activity for NT is higher compared to CT and other tillage practices at 0-0.1 m depth [52,53]. We observed significant differences between NT and CT treatments with a significant increase in bulk density on CT treatments.…”

Section: Soil Enzymatic Activity Was Higher For Ct Compared With Nt Scontrasting

confidence: 53%

“…The main advantages and disadvantages of each method described below are summarised in Table 1 [53].…”

Section: Low To Medium Resolution Fingerprinting Methods Based On Pcrmentioning

confidence: 99%

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Effect of strategic tillage in soil microbial communities in Vertisols from Queensland, Australia

Florez¹,

Andrea²

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In the last decades, tendency amongst growers in Australia has been towards practising minimum disturbance for soil preparation and complete stubble retention.Consequently, farmers have reduced labour, energy and machinery costs, and improved soil quality and crop profitability. However, there is scepticism around such practices given the build-up of herbicide resistant weeds, stubble-borne diseases and nutrient stratification. To address these issues, occasional tillage (or strategic tillage, ST) has been applied to fields under long-term no-tillage (NT). ST aims to overcome constraints arisen by no-tillage and takes into account soil water content, tools for deployment and timing of application. Soil microbial communities play an important role in soil function and are often used as early indicators of soil disturbance due to their prompt response to environmental changes. I compared biological indicators of soil health including microbial biomass, microbial enzymatic activity, metabolic diversity, genetic structure; diversity of bacterial, archaeal and fungal communities, and abundances of nitrogen cycle genes to assess the impact of ST on long-term NT. In Hermitage, ST was applied to soils under NT and conventional tillage (CT), in which stubble was retained. Soil samples were collected 3.5 and 13 months after ST operations. While it is clear that there would be immediate effects on soil biology, I chose these time points to allow a reasonable amount of time to evaluate whether microbial communities can restore and provide the ecosystem function needed for crop performance. I observed differences between NT and CT in enzymatic activity after 3.5 months, possibly attributed to physico-chemical properties and land management. However, one year after tillage deployment there were no changes in the biological indicators, microbial structure and diversity that were measured after ST.High throughput 16S rRNA gene amplicon sequencing targeting bacteria and archaea revealed 69 operational taxonomic units (OTU's) at relative abundances higher than 1%. The most abundant phyla were Crenarchaeota (25%) and Acidobacteria (28.1%).Fungal communities profiled by internal transcribed region (ITS) amplicon high throughput sequencing showed no significant differences between treatments. The 3 most abundant phylum was Ascomycota (60%) with a relative abundance higher than Nevertheless, assessment of abundance of nitrogen cycle genes for the three sites showed a significant impact of ST management. In Hermitage and Jimbour, nitrogen fixers tended to be enriched after ST application probably due to organic residue incorporation, previously shown to influence the abundance of these organisms. In contrast, the abundance of nitrogen fixing communities tended to decrease on surface soils in Biloela. The decrease may be related to inorganic forms of N affecting the nitrogenase activity in diazotrophic communities. Ammonia oxidizing bacteria (AOB) had an increase in abundance after ST application in Hermitage for soils under NT...

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Soil enzymatic activities and available P and Zn as affected by tillage practices, canola (Brassica napus L.) cultivars and planting dates

Cited by 35 publications

References 55 publications

Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts

Surface soil phosphorus and phosphatase activities affected by tillage and crop residue input amounts

Short-term dynamics of soil carbon, microbial biomass, and soil enzyme activities as compared to longer-term effects of tillage in irrigated row crops

Effect of strategic tillage in soil microbial communities in Vertisols from Queensland, Australia

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