Edge of field water quality monitoring from various management practices in the Ozark Highlands Project
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1 Edge of field water quality monitoring from various management practices in the Ozark Highlands Project 5-13 T.C. Daniel Joe Staed Paul DeLaune Andrew Sharpley Tara Verkler
2 Project Goals Develop edge-of-field P loadings from agriculture Demonstrate that BMPs improve water quality Forage/Grazing management Broilers litter application Soil test P (STP) Swine slurry application
3 Watershed Project to Collect Contaminants in Natural Runoff Berm Flume Water Sampler
4 Impediments to Project Goals Runoff depends on rainfall ~2-3% below normal for project period Runoff varies!!!! Between years & paired watersheds (same year) Runoff volume & load Treatment effect difficult to show Manure sampling & land application Slurry &
5 3-year mean Actual Noah s Floods Jun-8 May-8 Apr-8 Mar-8 Feb-8 Jan-8 Dec-7 Nov-7 Oct-7 Sep-7 Aug-7 Jul-7 Jun-7 May-7 Apr-7 Mar-7 Feb-7 Jan-7 Dec-6 Nov-6 Oct-6 Sep-6 Aug-6 Jul-6 Jun-6 May-6 Apr-6 Mar-6 Feb-6 Project Period Jan-6 Dec-5 Nov Rainfall (cm)
6 Runoff (kl ha-1) and TP, DRP (g ha-1) Project Summary of Runoff Volumes and Loads Same TP with Varying WSP - Broiler Runoff (kl ha -1 ) TP Load (g ha -1 ) DRPLoad(gha -1 ) TS Load (kg ha -1 ) HE1 HE2 HE3 HE4 WSP 3.4 WSP 2.6 WSP 4.2 Control TS (kg ha-1)
7 Manure Sampling & Analyses Spreader Sample intake Sample splitter Agitator
8 What Worked to Accomplish Goals Interdisciplinary input Diligence Attention to detail Quality staff
9 Accomplishments
10 Forage management affects runoff P load HW3 Hayed Management type Hayed Conventional Flash grazed HW1 CV Grzd HW2 Flsh Grzd
11 Grazing Practices Affect Runoff and TP Loads HW1 1 TP Runoff HW2 Runoff (kl ha -1 ) HW3 1 2 TP (g ha -1 ) FRST1 1 1 Dec-7 Nov-7 Oct-7 Sep-7 Aug-7 Jul-7 Jun-7 May-7 Apr-7 Mar-7 Feb-7 Jan-7 Dec-6 Nov-6 Oct-6 Sep-6 Aug-6 Jul-6 Jun-6 May-6 Apr-6
12 Grazing Practices Affect Runoff and TP Loads TP Runoff HW HW2 6 TP (g ha -1 ) HW Runoff (kl ha -1 ) 26 FRST Jan-8 Feb-8 Mar-8 Apr-8 May-8 Jun-8
13 WEP (water extractable P) in manure controls runoff phosphorus (P) loss Broiler 4 lbs/ac TP HE4 Forest WEP 1:1 HE1 = 14 HE2 = 4 HE3 = 8 HE4 = HE3 HE2 HE1
14 2 1 2 Runoff (kl ha -1 ) 2 1 HE4 Dec-7 Nov-7 Oct-7 Sep-7 Aug-7 Jul-7 Jun-7 May-7 Apr-7 Mar-7 Feb-7 Jan-7 Dec-6 Nov-6 Oct-6 Sep-6 Aug-6 Jul-6 Jun-6 May-6 Apr HE Same TP rate with variable WEP rate 26-7 HE2 1 HE1 TP Runoff 1 TP (g ha -1 )
15 Same TP rate with variable WEP rate TP Runoff HE TP (g ha -1 ) HE2 HE Runoff (kl ha -1 ) 16 HE Jan-8 Feb-8 Mar-8 Apr-8 May-8 Jun-8
16
17 application affect P loss more than STP levels STP levels High ~ 4 ppm High tons litter High STP High STP + litter
18 application affect P loss more than STP levels Low STP STP levels High ~ 5 ppm High tons litter Low STP + litter
19 Runoff (kl ha -1 ) Low and high STP and litter application 26-7 STP 25 STP STP4 125 Dec-7 Nov-7 Oct-7 Sep-7 Aug-7 Jul-7 Jun-7 May-7 Apr-7 Mar-7 Feb-7 Jan-7 Dec-6 Nov-6 Oct-6 Sep-6 Aug-6 Jul-6 Jun-6 May-6 Apr STP STP TP Runoff TP (g ha -1 )
20 Low and high STP and litter application TP Runoff STP STP2 225 TP (g ha -1 ) STP Runoff (kl ha -1 ) 4 STP Jan-8 Feb-8 Mar-8 Apr-8 May-8 Jun-8
21 TP & Runoff Load 28
22 WEP in manure controls runoff phosphorus (P) loss Swine slurry Same Total P 4 lbs/ac Different WEP SW4 SW3 SW2 SW1
23 Difficulties Runoff varied between WSs No runoff in 27 Sampling lagoon Proven sampling protocol Standard Methods cautions about error Temporal variation Same day vs. days later Never got application correct Required sampling vs. Book values
24 Summary & Conclusions Runoff is weather dependent Varies between WS and years Variability can mask treatment effect Runoff dominates NPS load Lower runoff lower load regardless of TRT Background NPS loads occur Manure addition mask STP contribution
25 Summary & Conclusions When manure applied WEP addition determines TP load Affects concentration and P load Concentration and P load WEP application rate Time between application and runoff Lagoon slurry sampling VARIABLE Bookvalues for nutrient content
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