scholarly journals Interpretation of soil enzyme activities in a comparison of tillage practices along a topographic and textural gradient

2000 ◽  
Vol 80 (1) ◽  
pp. 71-79 ◽  
Author(s):  
D. W. Bergstrom ◽  
C.M. Monreal ◽  
A. D. Tomlin ◽  
J.J. Miller
Keyword(s):  
Enzyme Activities ◽  
Soil Enzyme ◽  
Slope Position ◽  
Soil Enzyme Activities ◽  
Tillage Practice ◽  
Tillage Practices ◽  
No Till ◽  
Ap Horizon ◽  
Lower Slope ◽  
Upper Slope

Assessment of the impacts of soil conservation practices requires measurement of the resulting changes in soil quality at scales inclusive of soil variability comparable to that of typical farms. The objective of this study was to compare changes in six soil enzyme activities (urease, glutaminase, phosphatase, arylsulfatase, β-glucosidase and dehydrogenase) and organic carbon (OC) content resulting from implementation of no-till along a topographic and soil textural gradient. Activities of β-glucosidase, glutaminase, phosphatase and arylsulfatase, and OC content were greater in coarse-textured soils at a lower slope-position than in fine-textured soil at an upper slope-position. Tillage practice influenced activities of urease, glutaminase, β-glucosidase and dehydrogenase but not OC content. The effect of tillage practice on enzyme activities was influenced by sampling depth and slope-position. Phosphatase and arylsulfatase activities of the Ap horizon behaved as indices of soil organic matter (SOM) content along the topographic gradient. Urease and dehydrogenase activities behaved as indices of soil biochemical activity within the Ap horizon. When interpreted in these terms, soil enzyme activities are comparable to other integrative measurements and as such describe system behavior and attributes. Key words: Soil enzyme activity, no-till, topographic position

Soil enzyme activities suggest advantages of conservation tillage practices in sorghum cultivation under subtropical conditions

Geoderma ◽  
2005 ◽  
Vol 129 (3-4) ◽  
pp. 178-185 ◽  
Author(s):  
A. Roldán ◽  
J.R. Salinas-García ◽  
M.M. Alguacil ◽  
E. Díaz ◽  
F. Caravaca
Keyword(s):  
Enzyme Activities ◽  
Conservation Tillage ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
Tillage Practices

scholarly journals Multi-Location Study of Soil Enzyme Activities as Affected by Types and Rates of Manure Application and Tillage Practices

Agriculture ◽  
2011 ◽  
Vol 1 (1) ◽  
pp. 4-21 ◽  
Author(s):  
Veronica Acosta-Martinez ◽  
Maysoon M. Mikha ◽  
Karamat R. Sistani ◽  
Phillip W. Stahlman ◽  
Joseph G. Benjamin ◽  
...  
Keyword(s):  
Enzyme Activities ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
Manure Application ◽  
Tillage Practices ◽  
Location Study

On the way towards conservation tillage on the activities of soil enzymes related to carbon cycle in a multi-sequence maize-wheat-soybean rotation system

2021 ◽  
Author(s):  
Xiu Dong ◽  
Yan Zhang
Keyword(s):  
Carbon Cycle ◽  
Enzyme Activities ◽  
Soil Enzymes ◽  
Conservation Tillage ◽  
Soil Depth ◽  
Soil Enzyme ◽  
No Tillage ◽  
Soil Enzyme Activities ◽  
Tillage Practices ◽  
Rotation System

<p><strong>On the way towards conservation tillage on the activities of soil enzymes related to carbon cycle in a multi-sequence maize-wheat-soybean rotation system</strong></p><p><strong>Authors: </strong><strong>Xiu Dong<sup>1,2</sup></strong>,<strong> Yan Zhang<sup>1,2</sup>, Yuying Shen<sup>1,2*</sup></strong></p><p><strong>Affiliations:</strong></p><p><sup>1</sup>State key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou 730020, PR China</p><p><sup>2</sup>College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, PR China</p><p><strong>Abstract</strong></p><p>Designing and developing sustainable cropping systems and reasonable cultivation measures have become the major focuses in the semiarid Loess Plateau region of China. However, long-term conservation tillage practices on the activities of soil enzymes related to carbon cycle in maize-wheat-soybean rotation system are still unclear. This study aimed to investigate the effects of 19 years of conservation tillage practices on the cellobiohydrolase (CBH), β-1,4-glucosidase (BG) and β-1,4-xylosidase (BXYL) activities in the 0-20 cm soil depth under a two-year cycle spring maize (Zea mays L.)-winter wheat (Triticum aestivum L.) -summer soybean (Glycine max L.) rotation cropping system. Treatments included conventional tillage (T), conventional tillage followed by straw mulching (TS), no tillage (NT), and no tillage followed by straw mulching (NTS). We found that conservation tillage practices could increase soil enzyme activities significantly, the highest soil CBH and BG activities were in NTS (1.25 and 5.72 nmol·g<sup>-1</sup>·h<sup>-1</sup>)， the highest soil BX activities were in TS (2.13 nmol·g<sup>-1</sup>·h<sup>-1</sup>). Compared to T, no tillage had no effect on soil enzymes activities. The effects of conservation tillage practices on soil enzyme activities varied with soil depth, higher soil enzyme activities were showed in the 0-5 cm than in 5-20 cm soil depths. In addition, our results indicated that the key factors driving the changes in soil enzyme activities were soil microbial biomass carbon and organic carbon. This finding highlighted the importance of conversation tillage practices on maintaining the soil carbon pool in rotation ecosystem.</p>

Site-specific wild oat (Avena fatua L.) management

2012 ◽  
Vol 92 (5) ◽  
pp. 923-931 ◽  
Author(s):  
H. J. Beckie ◽  
S. Shirriff
Keyword(s):  
Specific Treatment ◽  
Triticum Aestivum L ◽  
Avena Fatua ◽  
Slope Position ◽  
Wild Oat ◽  
Herbicide Application ◽  
Brassica Napus L ◽  
Site Specific ◽  
Lower Slope ◽  
Upper Slope

Beckie, H. J. and Shirriff, S. 2012. Site-specific wild oat ( Avena fatua L.) management. Can. J. Plant Sci. 92: 923–931. Variation in soil properties, such as soil moisture, across a hummocky landscape may influence wild oat emergence and growth. To evaluate wild oat emergence, growth, and management according to landscape position, a study was conducted from 2006 to 2010 in a hummocky field in the semiarid Moist Mixed Grassland ecoregion of Saskatchewan. The hypothesis tested was that wild oat emergence and growth would be greater in lower than upper slope positions under normal or dry early growing season conditions. Three herbicide treatments were imposed on the same plots each year of a 2-yr canola (Brassica napus L.) – wheat (Triticum aestivum L.) sequence: (1) nontreated (weedy) control; (2) herbicide application to upper and lower slope positions (i.e., full or blanket application); and (3) herbicide application to lower slope position only. Slope position affected crop and weed densities before in-crop herbicide application in years with dry spring growing conditions. Site-specific wild oat herbicide application in hummocky fields in semiarid regions may be justified based on results of wild oat control averaged across slope position. In year 2 of the crop sequence (wheat), overall (i.e., lower and upper slope) wild oat control based on density, biomass, and dockage (i.e., seed return) was similar between site-specific and full herbicide treatment in 2 of 3 yr. Because economic thresholds have not been widely adopted by growers in managing wild oat, site-specific treatment in years when conditions warrant may be an appropriate compromise between no application and blanket herbicide application.

Change Analysis of Enzyme Activity under Different Conditions of Film Remnant in Soil

2012 ◽  
Vol 518-523 ◽  
pp. 39-43
Author(s):  
Xiao Guang Zhao ◽  
Yuan Yuan Guan ◽  
Wen Yu Huang
Keyword(s):  
Enzyme Activity ◽  
Enzyme Activities ◽  
Scientific Basis ◽  
Soil Enzyme ◽  
Soil Microorganism ◽  
Soil Enzyme Activities ◽  
Change Analysis ◽  
Soil Material ◽  
The Relationship

In this paper, simulated experiments were performed in pots by using soil materials in different conditions of film remnant. Based on the research on soil microorganism quantity trends of soil enzyme activities were analyzed systematically: soil without film remnant, soil with film remnant for 5, 10, 15 and 20 years. By analyzing crop progress, the relationship with soil material was studied, in order to provide scientific basis for the variation laws between different conditions of film remnant and the activity of soil enzyme.

Distinct effects of N and P addition on soil enzyme activities and C distribution in aggregates in a subalpine spruce plantation

2018 ◽  
Vol 141 (2) ◽  
pp. 199-212 ◽  
Author(s):  
Junsheng Huang ◽  
Wenjing Chen ◽  
Kaibin Qi ◽  
Bing Yang ◽  
Weikai Bao ◽  
...  
Keyword(s):  
Enzyme Activities ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
C Distribution ◽  
P Addition
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