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Effects of Chlordane and Water Amendments on N Mineralization in the Rizhosphere of Fluffgrass on the Jornada Basin LTER, 1987

General Information
Data Package:
Local Identifier:knb-lter-jrn.210385002.46
Title:Effects of Chlordane and Water Amendments on N Mineralization in the Rizhosphere of Fluffgrass on the Jornada Basin LTER, 1987
Alternate Identifier:DOI PLACE HOLDER
Abstract:

Recent studies suggest that rhizosphere soil microarthropods may have a major role in determining soil nitrogen availability. Desert soil microarthropods are consumers of soil bacteria, fungi, and nematodes, thus they accelerate mineralization processes by causing turnover in immobilized nitrogen. This study investigated whether changing densities of soil microarthropods results in changes in nitrogen availability. It was part of a larger investigation in which nematodes, mites, litter, and plant material was also collected.Twenty 6 x 6 m plots were established in areas comprised of fluffgrass (Erioneuron pulchellum) with a 3 m buffer between plots. Five plots were randomly assigned to one of four treatments: (1) chlordane amendment 100ml AI (active ingredients) per 10,000 ml) to exclude microarthropods, (2) sprinkler irrigation (6 mm per week), (3) sprinkler irrigation (6 mm/week) plus chlordate amendment (as above), (4) control (no treatment). Three randomly located soil subsamples were taken from each plot. Samples were analyzed for nitrate and ammonium according to the procedure outlined in the methods. For additional data from this larger study, refer to other JRN packages: 210385004, 210385003, 210385008, 210385005, 210385006, 210385001. Sampling occurred in 1987. This study is complete.

This dataset is from the following thesis:

Silva, Solange Inacia. 1989. The effects of microarthropods on nitrogen availability within the rhizosphere of Erioneuron pulchellum in a northern Chihuahuan Desert ecosystem. New Mexico State University: Las Cruces, NM.

Publication Date:2019-07-16

Time Period
Begin:
1987-01-05
End:
1987-05-01

People and Organizations
Contact:Anderson, John  
Contact:Manager, Data  [  email ]
Creator:Solange, Silva 
Associate:Jornada Basin LTER

Data Entities
Data Table Name:
Chlordane and Water Effects on N MIneralization, 1987
Description:
Chlordane and Water Effects on N MIneralization, 1987
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210385002/46/8875c0fcaaed6a3fe82d8e487b0b8aac
Name:Chlordane and Water Effects on N MIneralization, 1987
Description:Chlordane and Water Effects on N MIneralization, 1987
Number of Records:300
Number of Columns:7

Table Structure
Object Name:data_JornadaStudy_385_fluffgrass_rhizosphere_n_mineralization.csv
Size:7394 bytes
Authentication:87efa3f4b8f5f3318c2e932e8c8bf99c Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 
Column Name:INC_TIME  
PLOT  
TRT  
SUBSAMPLE  
NO3  
NH4  
SWC  
Definition:Incubation Time [F,0,2,4,8 week]Plot number [1-20]Treatment [1 = Chlordane amendment 2 = water amendment (6 mm per week) 3 = water + Chlordane amendment (6 mm per week) 4 = control (no treatment)]Subsample [1-3]Soil nitrate (mg/kg)Soil ammonium (mg/kgSoil Moisture Content (percent)
Storage Type:string  
string  
string  
string  
float  
float  
float  
Measurement Type:nominalnominalnominalnominalratioratioratio
Measurement Values Domain:
DefinitionIncubation Time [F,0,2,4,8 week]
DefinitionPlot number [1-20]
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code1
Definitionchhlordane amendment
Source
Code Definition
Code2
Definitionwater amendment
Source
Code Definition
Code3
Definitionwater + chlordane
Source
Code Definition
Code4
Definitioncontrol
Source
DefinitionSubsample [1-3]
Unitmilligramsperkilogram
Typereal
Min0.04 
Max39.96 
Unitmilligramsperkilogram
Typereal
Min0 
Max15.13 
Unitpercent
Typereal
Min0.96 
Max9.43 
Missing Value Code:              
Accuracy Report:              
Accuracy Assessment:              
Coverage:              
Methods:              

Data Package Usage Rights

This data package is released to the "public domain" under Creative Commons CC0 1.0 "No Rights Reserved" (see: https://creativecommons.org/publicdomain/zero/1.0/). It is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein "website") in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and its components) is made available "as is" and with no warranty of accuracy or fitness for use. The creators of this data package and the website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

Keywords

By Thesaurus:
LTER Core AreaInorganic Nutrients
JRN Dataset KeywordsPlant, Nitrogen, and Micro-nutrients, non-core
LTER Controlled Vocabularynitrogen
mineralizationmineralization
keywordschlordane, fluffgrass

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package
Description:

Twenty 6 x 6 m plots were established with a 3 m buffer between plots. Five plots were randomly assigned to one of four treatments: (1) chlordane amendment 100ml AI (active ingredients) per 10,000 ml) to exclude microarthropods, (2) sprinkler irrigation (6 mm per week), (3) sprinkler irrigation (6 mm/week) plus chlordate amendment (as above), (4) control (no treatment). Three randomly located subsamples were taken from each plot.

Net minerizable N was estimated using a batch incubation procedure Soil subsamples (25g) were incubated at 35 C in 50-ml plastic vials covered with 0.0125 mm polyethylene film and sealed with rubber bands to reduce soil moisture loss. Moisture content was adjusted to 10% water content by weight at weekly intervals. Sub-samples were analyzed for ammonium and nitrate content following 0, 2, 4 and 8 weeks of incubation. Inorganic N was extracted by placing 10 g of soil into polyethylene bottles containing 100 ml of 2.0 Molar KCL + PMA. Samples were shaken 30 times, and let sit for 24 hours, and then filtered. NH4 was measured by an automated slicylate procedure, and NO3 + NO2 by an automated cadmium reduction procedure

Net N mineralization was calculated as the net change in N occuring from the beginning to the end of each incubation period.

People and Organizations

Creators:
Individual: Silva Solange
Contacts:
Individual: John Anderson
Individual: Data Manager
Email Address:
datamanager.jrn.lter@gmail.com
Associated Parties:
Individual: Jornada Basin LTER
Email Address:
https://jornada.nmsu.edu/lter
Role:Organization

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period
Begin:
1987-01-05
End:
1987-05-01
Geographic Region:
Description:Our study site is located in the northern Chihuahuan Desert, approximately 25 km northeast of Las Cruces, New Mexico, USA (+32.6 N, -106.7 W, elevation 1315 m). Annual precipitation is 24 cm and maximum temperatures average 13 C in January and 36 C in June. Our study site includes the 78,000 ha Jornada Experimental Range operated by the USDA Agricultural Research Service (http://jornada.nmsu.edu/), and the 22,000 ha Chihuahuan Desert Rangeland Research Center (CDRRC, http://chihuahuansc.nmsu.edu/) operated by New Mexico State University (http://www.nmsu.edu/). Please contact our data manager for more detailed location information (datamanager.jrn.lter@gmail.com)
Bounding Coordinates:
Northern:  32.488Southern:  32.669
Western:  -106.865Eastern:  -106.713

Project

Maintenance

Maintenance:
Description:Sampling occurred in May of 1987. This data collection is complete
Frequency:
Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'milligramsperkilogram'
        |     |     |     |  \___attribute 'multiplierToSI' = '1'
        |     |     |     |  \___attribute 'name' = 'milligramsperkilogram'
        |     |     |     |  \___attribute 'parentSI' = 'milligrams'
        |     |     |     |  \___attribute 'unitType' = 'mass'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'milligrams in a kilo gram'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'percent'
        |     |     |     |  \___attribute 'multiplierToSI' = '1'
        |     |     |     |  \___attribute 'name' = 'percent'
        |     |     |     |  \___attribute 'parentSI' = 'percent'
        |     |     |     |  \___attribute 'unitType' = 'dimensionless'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'percent'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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