Probability of profitable yield response to nitrification inhibitor used with liquid swine manure on corn

Kyveryga, Peter; Blackmer, T. M.

doi:10.1007/s11119-013-9307-8

Cited by 14 publications

(14 citation statements)

References 22 publications

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“…This supports Instinct being a nitrification inhibitor and thus increasing soil NO 3 into the spring, but not nitrification control within the springtime period. Kyveryga and Blackmer (2013) found no difference in LSNT concentrations for LSM without and with Instinct at a single rate of 1 L ha −1 , a rate that was below the rates used in our study. In contrast, Vetsch et al (2017), with the same Instinct rates as our study, found Instinct resulted in greater NH 4 -N at a depth of 0-to 30-cm in the late spring with late fall applied LSM.…”

Section: Late Spring Soil Samplingcontrasting

confidence: 82%

Evaluation of fall applied liquid swine manure with encapsulated nitrapyrin

Sassman¹,

Barker²,

Lundvall

et al. 2020

Soil Science Soc of Amer J

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Fall applied liquid swine (Sus scrofa domesticus) manure (LSM) can lead to economic and environmental concerns due to potentially enhanced NO 3 loss. Objectives of this study were to evaluate LSM application timing and use of Instinct nitrification inhibitor, and compare to anhydrous ammonia (AA). Treatments were a no-N control, AA (without Instinct), and LSM with three Instinct rates applied each of 3 yr on October 1 (early fall) and November 1 (late fall). The effect of Instinct was inconsistent. Instinct increased soil NH 4-N concentrations in fall (only early fall LSM application) and spring sampled LSM injection zones. However, in the late spring Instinct had no effect to minimal positive effect on soil inorganic-N, and the high rate was not more effective than the low rate. Corn (Zea mays L.) canopy normalized difference vegetative index (NDVI) was not influenced by Instinct or different between N source, and greatest with late fall N application. Across years, Instinct increased corn grain yield only when early fall applied with the low rate. However, LSM with Instinct had lower yield compared to AA. Waiting to apply N in late fall provided increased inorganic N retention, and with LSM higher corn yield. Based on this study, AA was a better fall applied N source compared to LSM with or without Instinct. A decision to use Instinct with LSM must weigh cost of the inhibitor against other options, such as delayed fall or spring application, or use of AA. 1 INTRODUCTION Iowa leads the USA in swine production with more than 6000 swine operations and over 40 million head marketed annually (NASS, 2019). That production level has resulted in areas within the state where large quantities of nutrients from swine manure are available for use in crop production. Research conducted by Risse et al. (2001) found LSM

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Section: Late Spring Soil Samplingcontrasting

confidence: 82%

Evaluation of fall applied liquid swine manure with encapsulated nitrapyrin

Sassman¹,

Barker²,

Lundvall

et al. 2020

Soil Science Soc of Amer J

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“…For fields 1, 3, and 5, whole‐field CSNT‐N was positively skewed because of a relatively small number of samples that tested excessive in CSNT‐N. Positively skewed CSNT‐N distributions are common (Isla and Blackmer, 2007; Kyveryga and Blackmer, 2012, 2014; Kyveryga et al, 2012) resulting in low accuracy for mean CSNT‐N prediction based on whole‐field sampling. For the most restrictive scenario (6.4% CV accepted), even with an impractical sampling intensity of 80 stalks per field (>10 per hectare for all fields), the probability of obtaining a true field CSNT‐N mean value did not exceed 64 to 85% (Fig.…”

Section: Resultsmentioning

confidence: 99%

In‐Field Spatial Variability of Corn Stalk Nitrate Test Results

et al. 2019

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The corn (Zea mays L.) stalk nitrate test (CSNT) is a postharvest plant test that provides feedback on N supply vs. crop needs of a growing season. As such, test results can provide information on the need for adjustments in N management in future years. However, CSNT‐N can be variable within fields. The aim of this study was to (i) describe and relate within‐field CSNT‐N and corn silage yield spatial variability and (ii) to evaluate a yield‐based, targeted, CSNT sampling alternative. In 2013, five corn fields were grid sampled to determine the impact of sampling density on accuracy of CSNT‐N classification for the whole field. Close‐proximity variability (within a 3‐m row) was determined as well. In 2014, the study was expanded to include three additional fields with 2013 and 2014 yield data. Results showed similar means and standard deviation (SD) for close‐proximity sampling and whole‐field sampling. Thus, time and resources invested in CSNT sampling can be reduced with close‐proximity sampling. Current sampling guidelines (composite sample per field using a sampling intensity of 2.5 stalks ha−1) resulted in probabilities of estimating a field's mean CSNT‐N of 25, 32, and 72% for coefficients of variation (CV) of ±6.4, ±11, and ±22%, respectively. High‐yielding areas had more homogenous CSNT‐N values than low‐yielding areas. The analysis of corn stalks per yield zone resulted in reduced CSNT‐N spatial variability. Even intense sampling strategies for whole fields can result in interpretation errors while yield‐based CSNT sampling results in more meaningful information for N management. Core Ideas Corn stalk nitrate test results help corn growers fine‐tune N management. Within‐field corn stalk nitrate test‐N variability can lead to incorrect interpretations. Adoption of corn stalk nitrate test use can be enhanced with yield‐based field sampling. The ratio of yield and corn stalk nitrate test‐N may be helpful to identify areas with sufficient N.

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“…Nitrapyrin was marketed in the early 1970's (Prasad & Power, 1995), and it was recently reformulated as a water-based microencapsulated product (Instinct, Dow AgroSciences, Indianapolis, IN) for use with liquid fertilizer solutions to delay ammonium conversion to nitrate and subsequently reduce the potential for gaseous and leaching loss of N (Burzaco et al, 2013;Omonode & Vyn, 2013;Kyveryga & Blackmer, 2014). The probability of a yield response to nitrapyrin was greatest when spring precipitation was high (Kyveryga & Blackmer, 2014). Wolt's (2004) review found that nitrapyrin increased grain yields 7% and that it reduced leaching loss 16% and greenhouse gas emissions 51%.…”

Section: Introductionmentioning

confidence: 99%

Pronitridine Nitrification Inhibitor With Urea Ammonium Nitrate for Corn

Nelson¹

2018

JAS

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Nitrification inhibitors have been used to enhance the efficiency of nitrogen fertilizers. This research evaluated the effectiveness of nontreated urea ammonium nitrate (UAN) at 0, 67, 135, 202, and 270 kg N ha -1 as well as UAN treated with nitrification inhibitors (pronitridine at 9.4 and 18.8 L ha -1 or nitrapyrin at 0.5 kg a.i. ha -1 ) to enhance N uptake and increase yield of corn (Zea mays L.). The study took place from 2012-2014 in upstate Missouri on a claypan soil. During the experiments, environmental conditions (high, medium, and low yielding years) affected corn response to pronitridine and nitrapyrin. In general, UAN plus pronitridine at 9.4 L ha -1 had similar effects on corn compared pronitridine at a higher (18.7 L ha -1 ) rate. During a high-yielding year (2014), in order to produce yields equivalent to 67 kg N ha -1 plus pronitridine at 9.4 L ha -1 or nitrapyrin, UAN needed to be increased 14 to 19%. Similarly, the amount of nontreated UAN needed to be increased 8 to 11% for yields to be equivalent to UAN at 135 kg N ha -1 plus pronitridine at 9.4 L ha -1 or nitrapyrin. Grain N removal and agronomic efficiency was highest with pronitridine at 9.4 L ha -1 and nitrapyrin combined with 67 and 135 kg N ha -1 , respectively. This research indicates that pronitridine was as effective as nitrapyrin when added to a pre-emergence application of UAN placed between the rows in a dribble band.

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Probability of profitable yield response to nitrification inhibitor used with liquid swine manure on corn

Cited by 14 publications

References 22 publications

Evaluation of fall applied liquid swine manure with encapsulated nitrapyrin

Evaluation of fall applied liquid swine manure with encapsulated nitrapyrin

In‐Field Spatial Variability of Corn Stalk Nitrate Test Results

Pronitridine Nitrification Inhibitor With Urea Ammonium Nitrate for Corn

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