Nitrogen Mineralization as Affected by Temperature in Calcareous Soils Receiving Repeated Applications of Dairy Manure

Abstract

Prediction of N mineralization is dependent on accurate rate correction factors and the ratio of the change of the rate coefficient of mineralization for every increase in temperature of 10°C (Q10) based on temperatures observed in the region. Few studies have investigated N mineralization in soils receiving repeated applications of manures at low temperatures. This study determined that manure additions may lead to larger Q10 values at low temperatures and growing degree‐days may aid in predicting N release from these soils. There are currently no tools available to help predict N mineralization for the silty soils found in southern Idaho receiving repeated manure applications. This experiment aimed to determine the effect of temperature on N mineralization from control and manured soils, develop N mineralization rate correction factors for temperature [ratio of the change in the rate coefficient of mineralization for every 10°C increase (Q10) and temperature factors], and create a simple model for predicting N mineralization as a function of growing degree‐days. Manured and control soils underwent a 49‐d laboratory incubation at five temperatures (–14, 4, 10, 23, and 30°C); soil inorganic N concentration was determined at 0, 1, 3, 5, 7, 13, 20, 28, 35, 42, and 49 d. Net N mineralization was fitted to a zero‐order model, where the rate coefficient (k) values for the manured soil ranged from 0.017 to 1.28 mg kg–1 soil d–1 over the five temperature treatments, whereas k in the control measured 0.028 to 0.53 mg kg–1 soil d–1. The calculated Q10 values from –14 to 30°C were 2.7 and 2.0 for the manured and control soils respectively. At low temperatures (–14 to 4°C), the Q10 for manured soil was 5.1 compared with 1.5 for the control. This suggests that manure additions may lower the temperature threshold for N mineralization under near frozen soil conditions. Manure treatment effects on the temperature factor were not observed, suggesting that manure application history may not need to be considered when developing temperature factor coefficients for N mineralization models.

Liquid swine manure as a sidedressed nitrogen source for corn

“…Due to the cooler-and wetter-than-normal growing conditions, mineralization was likely slower than normal. Several studies have reported that mineralization and nitrification from manure N are slowed at cooler temperatures (Burger & Venterea, 2008;Cassity-Duffey, Moore, Satterwhite, & Leytem, 2018;Cassman & Munns, 1980) and may be more related to accumulated growing degree days than time (Eghball, 2000;Eghball et al, 2002;Griffin & Honeycutt, 2000;Griffin, Honeycutt, & He, 2002). Soil moisture also has a role in manure N mineralization, although this appears to interact with temperature (Bitzer & Sims, 1988;Cassman & Munns, 1980).…”

Macronutrient dynamics in avocado (Persea americana Mill.) ‘Hass’ under the central peruvian coast conditions

“…After fruit set, in new fruit development, Lovatt (1995) and Salvo (2017) declared that the highest N demands occur due to the competition between fruit and new shoot formation; however, if there are reserves in the soil and small branches, fertilization is not required (Lahav et al, 1990;Rosecrance et al, 2003). Undoubtedly the mineralization of organic nitrogen, requires favorable conditions such as adequate moisture and soil temperature (Cassity et al, 2020;Cassity et al, 2018), neutral or alkaline pH and additions of dairy digestato (Wagoner et al, 2021), and amount of ammonium, season and management (Giguere N is related to vegetative processes and contributes to delaying fruit ripeninReducing N application would favor the contribution of K (Mengel & Kirkby, 2000). N doses decreased from stage 6 until they were no longer applied at harvest, which would explain why the lowest concentration occurred at the beginning of harvest.…”

Predicting nitrogen mineralization from dairy manure and broadleaf residue in a semiarid cropping system

“…Manure N mineralization has been shown to decrease with an increase in soil clay content (Bhogal et al., 2016; Bouajila et al., 2021; Ige et al., 2015). As soil temperature increases, microbial activity and therefore mineralization also increases (Cassity‐Duffy et al., 2018; Whalen et al., 2019). The optimum soil moisture content for N mineralization has been reported to be between 80% and 100% of field capacity, with depressed N mineralization at higher or lower soil moisture contents (Basak & Biswas, 2014; Guntiñas et al., 2012; Ige et al., 2015).…”