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Effects of microarthropod exclusion and water amendments on fluffgrass rhizosphere anion exhange at the Jornda Basin, 1986-1987

General Information
Data Package:
Local Identifier:knb-lter-jrn.210385005.29
Title:Effects of microarthropod exclusion and water amendments on fluffgrass rhizosphere anion exhange at the Jornda Basin, 1986-1987
Alternate Identifier:DOI PLACE HOLDER
Abstract:

This data package contains fluff grass (Erioneuron pulchellum) data from 1986-1987. The purpose of this study was to test if changing densities of soil microarthropods and nematodes results in changes in fluff grass nitrogen mineralization and biomass. Twenty plots (each 6m x 6m) with 3-meter buffers between were established on the Jornada Basin CDRCC. Four treatments were assigned to 5 plots each 1) Chlordane (to exclude microarthropods), 2) Chlordane and water, 3) Water, and 4) Control. For this portion of the study, anion exchange bags were placed in the rhizosphere of a fluffgrass in each plot. Bags were left in the field 3 months, collected, brought to the lab and analyzed for NO3 -N using a cadmium reduction procedure. This package contains date of data collection, treatment type, and NO3 mg/kg concentration. This data set is complete

Publication Date:2020-04-14

Time Period
Begin:
1986-11-15
End:
1987-02-15

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

Data Entities
Data Table Name:
JRN_385005_fluffgrass_rhiz_anionexchangeNO3.csv
Description:
Microarthropod effects on fluffgrass rhizsosphere anion exchange at the Jornda Basin, 1986-1987
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-jrn/210385005/29/6e8dac9e45ad27acd16f811ffd665d56
Name:JRN_385005_fluffgrass_rhiz_anionexchangeNO3.csv
Description:Microarthropod effects on fluffgrass rhizsosphere anion exchange at the Jornda Basin, 1986-1987
Number of Records:320
Number of Columns:5

Table Structure
Object Name:JRN_385005_fluffgrass_rhiz_anionexchangeNO3.csv
Size:8934 bytes
Authentication:21badb2d5270157d3309169a6b2664a5 Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\n
Orientation:column
Simple Delimited:
Field Delimiter:,

Table Column Descriptions
 
Column Name:DATE  
PLOT  
TRT  
SAMPLE  
NO3  
Definition:Date data collectedPlot numberTreatment typeSample numberNitrate in mg/kg dry soil
Storage Type:date  
string  
string  
string  
float  
Measurement Type:dateTimenominalnominalnominalratio
Measurement Values Domain:
FormatYYYY-MM-DD
Precision
DefinitionPlot number
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeW
DefinitionWater
Source
Code Definition
CodeC
DefinitionControl
Source
Code Definition
CodeCHW
DefinitionChlordane and water
Source
Code Definition
CodeCH
DefinitionChlordane
Source
DefinitionSample number
UnitmilligramsPerKilogram
Typereal
Min0 
Max3.63 
Missing Value Code:        
CodeNA
ExplNo data collected
Accuracy Report:          
Accuracy Assessment:          
Coverage:          
Methods:          

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) has an ethical obligation to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
Jornada Project NamesStudy 385
LTER Core AreaPopultations
JRN Dataset KeywordsLTER I, Plant, Nitrogen, and Micronutrients
LTER Controlled Vocabularynematodes, invertebrates, desert, grasses, plant communities, total nitrogen, plant properties, permanent plots, soil nitorgen, nutrient cycling, nitrogen content, soil, rhizosphere
Jornada Place NamesCDRRC

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 with a 3-meter buffer zone were established on the Jornada Basin CDRCC in 1986. Five plots each were randomly assigned to one of four treatments: (1) chlordane amendment (100ml Al (Active Ingredients) per 10,000 ml) to exclude microarthropods, (2) water (irrigation 6 mm per week), (3) water (6 mm per week) plus chlordane amendment (100 ml Al per 10,000 ml) and (4) control, no treatment.

An ion exchange resin bag technique (Binkley 1984, Lajtha 1988) was used to determine N availability in the rhizosphere of Erioneuron pulchellum. A 50 cm2 area of undyed nylon stocking material was sewn into a bag containing 10 g (wet weight) of either Dowex 1-X8 anion exchange resin or Dowex 50 W- X8 cation exchange resin, both 20-50 mesh. Anion resins were placed in three successive rinses of 0.5 M NaHCCO3, converting resins to the bicarbonate form. Cation resin bags, already in the H+ form, were rinsed three successive times with dilute HC1. All bags were rinsed with deionized water and spun dry in an open-basket hand centrifuge before being taken to the field. Ten bags of anion and two bags of cation exchange resin were placed in each plot (total 20 plots), directly in the rhizosphere of a plant (12 Erioneuron pulchellum plants per plot) at approximately 10 cm depth. Bags were replaced every 12 weeks for 9 months. Bags were rinsed thoroughly in deionized water and spun dry upon collection from the field. Anion and cation bags were desorbed in 2.0 M KC1 + PMA (to avoid bacterial and fungal growth). Samples were shaken 30 times, let set overnight, and filtered. The solution was analyzed for NH4-N using an automated salicylate procedure (Wall and Gehrke, 1975; Nelson 1983) and NO3 + NO2 -N using an automated cadmium reduction procedure (Henriksen and Selmer- Olsen 1970). Standards containing anion or cation exchange resin bags were extracted the same as field exchange resin bags.

People and Organizations

Creators:
Individual: Walt Whitford
Individual: Silva Solange
Contacts:
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:
1986-11-15
End:
1987-02-15
Geographic Region:
Description:Basin_Floor
Bounding Coordinates:
Northern:  32.7494871Southern:  32.47317259
Western:  -106.8728831Eastern:  -106.6927163

Project

Parent Project Information:

Title:LTER I
Personnel:
Individual: Walt Whitford
Role:Principal Investigator
Funding: No funding to report

Maintenance

Maintenance:
Description: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' = 'milligramsPerKilogram'
        |     |     |     |  \___attribute 'unitType' = 'mass'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'milligrams in 1 kilogram'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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