A simple method for estimating the nitrate nitrogen concentration based on dry matter in standing sorghum (<i>Sorghum bicolor</i>Moench) using stem juice test and dry matter content

Harada, Hiroyuki; Sunaga, Yoshihito; Yoshimura, Y.; Hatanaka, Takeshi

doi:10.1080/00380768.2001.10408423

Cited by 4 publications

(11 citation statements)

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“…Simple methods without grinding and extraction for estimating NO 3 ‐N concentrations have been developed using NO 3 ‐N concentrations of juice from a part of the stem for corn, sorghum and Sudangrass (Sunaga et al . 1999; Harada et al . 2001; Sunaga et al .…”

Section: Introductionmentioning

confidence: 99%

Simple technique for estimating nitrate nitrogen concentration of Italian ryegrass (Lolium multiflorum Lam.) at the heading stage using a chlorophyll meter

et al. 2006

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A simple technique for estimating the nitrate nitrogen (NO3‐N) concentration of crop in a field was developed for diploid Italian ryegrass (Lolium multiflorum Lam.) at the heading stage, using a hand‐held chlorophyll meter (SPAD‐502). A rapid method for estimating the NO3‐N concentration in the crop is required in order to feed cattle safely, since high levels of NO3‐N in crops cause the nitrate poisoning of ruminants. The SPAD reading was determined as an average for the middle part of 10 flag leaves. SPAD readings for a variety of Nioudachi were correlated with reduced nitrogen concentrations with the following equation: reduced N concentration (g kg−1 DM) = 0.563 × SPAD reading −11.492 with a coefficient of determination of 0.715. SPAD readings also increased with NO3‐N concentrations. However, the relationship did not seem to fit a linear curve. A critical value for the SPAD reading was 47 for a NO3‐N concentration of 2.0 g kg−1 DM, a critical value for the acute nitrate poisoning of ruminants. The critical SPAD reading value was applicable for eight of 10 other varieties tested. Yields for Nioudachi were increased with the increase in SPAD readings and maximal yields within a year were obtained with SPAD readings over 45, which were less than the critical value for NO3‐N accumulation. Therefore, it is possible to manage nitrogen levels to obtain sufficient yields and prevent acute nitrate poisoning.

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Section: Introductionmentioning

confidence: 99%

Simple technique for estimating nitrate nitrogen concentration of Italian ryegrass (Lolium multiflorum Lam.) at the heading stage using a chlorophyll meter

et al. 2006

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“…Harada et al . (2001) have developed equations for estimating the CF of grain, dual purpose and sorgo‐type sorghums.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, this equation would not be available for Sudangrass and Sudan‐type sorghum before heading. Harada et al . (2001) have reported equations using DM% for estimating the DF: DF for the grain and dual‐purpose‐type sorghum = 0.0072DM% 2 − 0.503DM% + 10.71, and for the sorgo‐type sorghum = 0.00445DM% 2 − 0.337DM% + 8.86.…”

Section: Resultsmentioning

confidence: 99%

“…(1999) reported that CF and DF could be estimated by the NO 3 ‐N concentrations of the stem juice and milk line depression score, which is determined by the ratio of the milk line position in a whole grain length, respectively. Harada et al . (2001) developed a simple method for estimating the NO 3 ‐N concentrations of grain‐type, dual‐purpose‐type and sorgo‐type sorghums using an approach with CF and DF.…”

Section: Introductionmentioning

confidence: 99%

“…Thereby, Sunaga et al (1999) reported that CF and DF could be estimated by the NO 3 -N concentrations of the stem juice and milk line depression score, which is determined by the ratio of the milk line position in a whole grain length, respectively. Harada et al (2001) developed a simple method for estimating the NO 3 -N concentrations of grain-type, dual-purpose-type and sorgo-type sorghums using an approach with CF and DF. In that study, CF could be estimated by multiplying the NO 3 -N concentrations of juice squeezed from stem discs with a thickness of 1 cm, obtained by cutting horizontally at a location corresponding to 25% of the total stem length, by a factor of 0.68 or 0.53 for grain and dual-purpose-types or sorgotype, respectively, and DF could be estimated from regression equations obtained from the relationships between DF and the dry matter ratios of a whole crop.…”

Section: Introductionmentioning

confidence: 99%

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A simple method for estimating nitrate nitrogen concentrations of standing Sudangrass (Sorghum sudanense (Piper) Stapf) and Sudan‐type sorghum (Sorghum bicolor Moench ×S. sudanense) at the heading stage by the nitrate nitrogen concentration of the stem juice and the dry matter ratio

2005

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A simple method for estimating the nitrate nitrogen (NO3‐N) concentrations of standing Sudangrass and Sudan‐type sorghum at the heading stage was developed. It has been reported that the NO3‐N concentrations on a dry matter basis of these crops could be estimated from multiplying the concentration factors (CF) by the dilution factors (DF): CF was the NO3‐N concentration of the stem on a fresh matter basis and DF was the dry matter partitioning ratio of the stem divided by the dry matter ratio of the stem. In the present study, the methods for estimating the CF by NO3‐N analysis of the stem juice and the DF by the dry matter ratio of the whole crop were examined. One half of all 68 harvests was used for the CF and DF predictions, and the other half was used to validate these and NO3‐N concentration estimations. The regression equation for estimating the CF from NO3‐N concentrations of the stem juice was: CF (g kg−1 FM) = 0.61 × NO3‐N concentrations of the stem juice at the 25% position (g L−1), which means at a position corresponding to 25% of the total stem length from the bottom, with a coefficient of determination (R2) of 0.908. The quadratic equation obtained from the relationship between the DF and the dry matter ratio of the whole crop (DM%) was: DF = 0.00652DM%2 − 0.492DM% + 11.29, and R2 = 0.953. In a comparison between the estimates and the actual CF and DF measurements for the validation samples, the CF and DF could be estimated with a high degree of accuracy from each estimate equation with an R2 of 0.845 and 0.958, respectively. The NO3‐N concentration estimates, calculated by multiplying the estimated CF by the estimated DF, corresponded to the analytical values by the established method with an R2 of 0.893.

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Optimizing Nitrogen Fertilizer–Use Recommendations for Winter Wheat in a Mediterranean‐Type Environment using Tissue Nitrate Testing

Korkmaz¹,

Ibrikçi²,

Ryan³

et al. 2008

Communications in Soil Science and Plant Analysis

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A simple method for estimating the nitrate nitrogen concentration based on dry matter in standing sorghum (Sorghum bicolorMoench) using stem juice test and dry matter content

Cited by 4 publications

References 4 publications

Simple technique for estimating nitrate nitrogen concentration of Italian ryegrass (Lolium multiflorum Lam.) at the heading stage using a chlorophyll meter

Simple technique for estimating nitrate nitrogen concentration of Italian ryegrass (Lolium multiflorum Lam.) at the heading stage using a chlorophyll meter

A simple method for estimating nitrate nitrogen concentrations of standing Sudangrass (Sorghum sudanense (Piper) Stapf) and Sudan‐type sorghum (Sorghum bicolor Moench ×S. sudanense) at the heading stage by the nitrate nitrogen concentration of the stem juice and the dry matter ratio

Optimizing Nitrogen Fertilizer–Use Recommendations for Winter Wheat in a Mediterranean‐Type Environment using Tissue Nitrate Testing

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