Evaluation of Several Indices of Potentially Mineralizable Soil Nitrogen

Bushong, Jacob T.; Norman, Richard; Ross, W. J.; Slaton, Nathan A.; Wilson, Charles E.; Gbur, Edward E.

doi:10.1080/00103620701663040

Cited by 34 publications

(42 citation statements)

References 11 publications

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“…Correlations methods Hot_N and Hyd_N were more strongly correlated with among chemical methods were similar to correlations between soil organic C and TN than were the biological indicators aerobic chemical and biological methods (Table 5) - mg kg −1 Table 1. ‡ Tillage abbreviations as in Table 2 and for soil management effects (Bushong et al, 2007(Bushong et al, , 2008Soon et al, 2007). It is a more standardized, simpler, and quicker procedure than the long-term aerobic incubation procedure.…”

Section: Discussionmentioning

confidence: 99%

“…Sharifi et al (2007) found that NaOH_N was significantly correlated with both N mineralized after a 24-wk aerobic incubation (r = 0.61) and the Illinois soil N test (r = 0.92; ISNT; Khan et al, 2001). Bushong et al (2007) found NaOH_N and ISNT were highly correlated (r = 0.90) for 25 soils from agricultural sites across the South-Central and Midwest USA. Both indices had similar cor relations with potential N mineralization (r = 0.60) measured by anaerobic incubation.…”

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confidence: 97%

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Assessing Indices for Predicting Potential Nitrogen Mineralization in Soils under Different Management Systems

Schomberg

Wiethölter

Griffin

et al. 2009

Soil Science Soc of Amer J

138

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A reliable laboratory index of N availability would be useful for making N recommendations, but no single approach has received broad acceptance across a wide range of soils. We compared several indices over a range of soil conditions to test the possibility of combining indices for predicting potentially mineralizable N (N 0 ). Soils (0-5 and 5-15 cm) from nine tillage studies across the southern USA were used in the evaluations. Long-term incubation data were fit to a fi rst-order exponential

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 97%

Assessing Indices for Predicting Potential Nitrogen Mineralization in Soils under Different Management Systems

Schomberg

Wiethölter

Griffin

et al. 2009

Soil Science Soc of Amer J

138

View full text Add to dashboard Cite

show abstract

“…Several laboratory methods were developed with different coefficient adjustments to crop N response, N extraction, or grain yield (Waring and Bremner, 1964;Angus et al, 1994;Wilson et al, 1994;Scott et al, 2005;Sahrawat, 2006;Bushong et al, 2007;Hirzel et al, 2011b). These have generated local recommendations that cannot be easily applied to all cultivars, crop management, and regions of the world.…”

Section: Introductionmentioning

confidence: 99%

Increasing nitrogen rates in rice and its effect on plant nutrient composition and nitrogen apparent recovery

Hirzel

Rodrı́guez

2013

Chilean J. Agric. Res.

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Rice (Oryza sativa L.) is one of the essential foods of the human diet; advances in agronomic crop management can improve productivity and profitability as well as reduce adverse environmental impacts. Nitrogen rates in Chile are generally based on crop yield without considering other agronomic factors. The objective of this experiment was to determine the effect of increasing N rates on plant nutrient composition and N apparent recovery in rice cultivated in five different locations in Chile. The five sites located in central Chile belong to one of the following soil orders: Inceptisol, Alfisol, and Vertisol; they were cropped in field conditions with 'Zafiro-INIA' rice fertilized with 0, 80, and 160 kg N ha -1. Whole-plant total DM, macronutrient composition, and N apparent recovery efficiency (NARE) were determined at grain harvest. Results indicate that all evaluated parameters, with the exception of K concentration, were affected by the soil used. Nitrogen rates only affected total DM production and P, K, and Mg concentrations in plants. Phosphorus and K response decreased when N was added to some soils, which is associated with its chemical properties. Magnesium concentration exhibited an erratic effect, but it was not affected by the N rate in most soils. Nitrogen apparent recovery efficiency was not affected by the N rate and accounted for approximately 49% and 41% for 80 and 160 kg N ha -1 , respectively. Macronutrient composition was 5.1-7.7 g N, 1.3-1.8 g P, 5.4-10.8 g K, 1.68-2.57 g Ca, and 0.81-1.45 g Mg kg -1 of total DM.

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“…New studies in Chile, carried out in two locations, indicate that the rice crop and its yield components respond to N rates of between 100 and 200 kg ha -1 applied before R flooding (Artacho et al, 2009). Moreover, crop response to N fertilization is also affected by the cultivar, soil type, and climatic fluctuations between years, mainly environmental temperature (Bushong et al, 2007;Jing, 2007;Ortega, 2007). The main rice cultivar cropped in Chile is 'Diamante-INIA' (Castillo and Alvarado, 2002), characterized by its tolerance to cold and high productivity, but there has been very little technological development related to its nutritional management.…”

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confidence: 99%

Effect of Nitrogen Rates and Split Nitrogen Fertilization on Grain Yield and its Components in Flooded Rice

Hirzel

Pedreros²,

Cordero

2011

Chilean J. Agric. Res.

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Nutritional management in rice (Oryza sativa L.) crops is mainly associated with N fertilization, which is difficult to adjust in field conditions due to variations in soil type and climatic conditions. Between 28 000 and 46 000 ha per year is dedicated to rice production in Chile and profits depend on fertilization. A field experiment determine the effect of N rates and split N fertilization on grain yield and its components was carried out in two locations during two consecutive seasons (2007 to 2009), where five N rates and five split N fertilizations were evaluated. The locations were in Parral (36º2' S; 72º08' W, Vertisol) and San Carlos (36º19' S; 71º59' W, Inceptisol), with N rates of 80, 100, 120, 140, and 160 kg ha -1 applied in different development stages, such as sowing, tillering, panicle initiation, and boot. Results indicate an important seasonal effect on grain yield. Yield increased with N rates higher than 120 and 140 kg ha -1 in San Carlos and Parral, respectively. Moreover, higher productivity with split N fertilization was (1) 33% of N at sowing, 33% at tillering, and 34% at panicle initiation or (2) 50% of N at sowing and 50% at panicle initiation. Yield components with the highest effect on productivity were affected by the evaluated split N. On the other hand, higher N rates increased the percentage of both stained and sterile grains per panicle.

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Evaluation of Several Indices of Potentially Mineralizable Soil Nitrogen

Cited by 34 publications

References 11 publications

Assessing Indices for Predicting Potential Nitrogen Mineralization in Soils under Different Management Systems

Assessing Indices for Predicting Potential Nitrogen Mineralization in Soils under Different Management Systems

Increasing nitrogen rates in rice and its effect on plant nutrient composition and nitrogen apparent recovery

Effect of Nitrogen Rates and Split Nitrogen Fertilization on Grain Yield and its Components in Flooded Rice

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