patch-burn grazing

PBG11 Stream water chemistry for the Shane Creek drainage basin in the Patch-Burn Grazing experiment at Konza Prairie

Abstract: 

PBG datasets are associated with a long-term, large-scale study that is addressing the effects of fire-grazing interactions in the context of a Patch-Burn Grazing management system designed to promote grassland heterogeneity. Effects of patch-burn grazing management on plant and animal diversity and the nature and variety of wildlife habitat are being assessed in two replicate management units, each consisting of three pastures (watersheds) designated C03A/C03B/C03C and C3SA/C3SB/C3SC. In each patch-burn grazing unit, one watershed is burned and two that are left unburned in a given year. The burning treatments are rotated annually so that each pasture is burned every third year. Each patch-burn grazing unit is paired with an annually-burned pasture for comparison with traditional grazing systems (C01A and C1SB). All grazing units are stocked with cow/calf pairs from approximately 1 May until 1 Oct at a stocking density equal to 3.2 ha per cow/calf. To examine the impact of patch burning and grazing in all 8 units, we monitor changes in plant species composition, residual biomass, grassland bird populations, insect populations, small mammal populations, soil nutrients, and stream water quality1 (1C3SA/C3SB/C3SC unit only). The KSU Department of Animal Science monitors cattle performance, including weight gain and body condition to assess the economic feasibility of using patch-burn management on a widespread basis.

This data set focuses on measuring Nitrate, ammonium, total N, soluble reactive P, total P, and dissolved organic C in four streams draining watersheds with 1 (N01B), 2 (N02B), 4 (N04D), and 20 (N20B) year target burn frequencies.

Data set ID: 

125

Core Areas: 

Short name: 

PBG11

Methods: 

Location of Sampling Stations: Shane Creek (T-9) Frequency of Sampling: Base flow samples are collected 3 times per week in mornings. If the base flow collection time corresponds to a storm flow event, they are classified as such. Variable Measured: NO3-N+ NO2-N, NH4-N, total-N, SRP (or soluble reactive phosphate), total-P, and dissolved organic carbon. Field Methods: Samples (250 mL) from mid-stream are collected 2-3 times per week. Date, time of day (CST), stream temperature (c) and stream height. Sub-samples (three 20mL vials) are taken upon returning to the lab. Samples are immediately frozen. Laboratory Methods: One vial is analyzed for inorganic nitrogen (N) and phosphorous (P). A second vial is run for dissolved organic carbon (DOC). The third vial is run for TN or total nitrogen, and TP or total phosphorous. At the completion of all analyses the vial with maximum volume is stored in the freezer as an archived sample for 10 years from date of collection. Nitrogen and phosphorus nutrients are performed by colorimetric determination on a flow solution analyzer. Dissolved organic carbon is measured by high temperature combustion. Data is compiled annually, checked by the RA, and archived by the IM. For additional metadata information see: http://lter.konza.ksu.edu/sites/default/files/DC.pdf For additional methods information see: http://lter.konza.ksu.edu/sites/default/files/MM.pdf

Data sources: 

Maintenance: 

ongoing

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