Predicting nitrogen fertilizer requirements for corn by chlorophyll meter under different N availability conditions

Rashid, M. T.; Voroney, Paul; Parkin, Gary

doi:10.4141/s04-005

Cited by 33 publications

(27 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Precipitations at St. Louis in 2004 and at Ste. Catherine in 2006 were similar but corn hybrids and site characteristics were different (Table 1); these factors could have affected CM readings (Blackmer and Schepers, 1994; Waskom et al, 1996; Sunderman et al, 1997; Bullock and Anderson, 1998; Costa et al, 2001; Rashid et al, 2005; Hawkins et al, 2007). Other factors that can reportedly affect CM readings include: developmental stage (Argenta et al, 2004; Scharf et al, 2006; Hawkins et al, 2007), disease or insect damage (Piekielek et al, 1995; Junqueira et al, 2004), plant density (Hashemi‐Dezfouli and Herbert, 1992; Blackmer et al, 1993), and other nutrient deficiencies (Masoni et al, 1996).…”

Section: Resultsmentioning

confidence: 99%

“…Chlorophyll meter readings have proven effective as a rapid diagnostic method to determine the N status of many crops, including spring wheat ( Triticum aestivum L.) (Follett et al, 1992; Vidal et al, 1999; Arregui et al, 2006), rice ( Oryza sativa L.) (Turner and Jund, 1991; Peng et al, 1993; Ladha et al, 1998), potato ( Solanum tuberosum L.) (Minotti et al, 1994), and corn (Piekielek and Fox, 1992; Schepers et al, 1992; Dwyer et al, 1995). Critical values or ranges of CM readings have been defined to maximize corn yields in Canada (Zebarth et al, 2002; Rashid et al, 2005), the United States (Piekielek and Fox, 1992; Waskom et al, 1996; Sunderman et al, 1997), and Brazil (Argenta et al, 2004). These values are usually based on the relationship between CM readings and relative corn grain yield (RY) (Piekielek and Fox, 1992; Blackmer and Schepers, 1994; Fox et al, 2001; Argenta et al, 2004; Rashid et al, 2005).…”

mentioning

confidence: 99%

“…Critical values or ranges of CM readings have been defined to maximize corn yields in Canada (Zebarth et al, 2002; Rashid et al, 2005), the United States (Piekielek and Fox, 1992; Waskom et al, 1996; Sunderman et al, 1997), and Brazil (Argenta et al, 2004). These values are usually based on the relationship between CM readings and relative corn grain yield (RY) (Piekielek and Fox, 1992; Blackmer and Schepers, 1994; Fox et al, 2001; Argenta et al, 2004; Rashid et al, 2005).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Chlorophyll Measurements and Nitrogen Nutrition Index for the Evaluation of Corn Nitrogen Status

et al. 2008

View full text Add to dashboard Cite

Plant-based diagnostic techniques are used to determine the level of crop N nutrition but there is limited comparative research on the diff erent methods. Our objectives were to establish the relationship between chlorophyll meter (CM) readings and N nutrition index (NNI) during the corn (Zea mays L.) growing season, and to compare both methods as diagnostic tools for predicting grain yield response to N fertilization. Th e study was established at eight site-years using four to seven N fertilization rates. Th e CM readings from the youngest collared leaf were taken on fi ve to eight sampling dates in 2004, 2005, and 2006 along with NNI determinations. Generally, CM readings and NNI increased with increasing N rates. Chlorophyll meter readings and relative CM (RCM) readings were related to NNI, but the intercepts and/or slope of the response curves varied with site-year. Because they are site-specifi c, these relationships may not be reliable indicators of corn N status. Th e relationship between CM readings and relative grain yield (RY) at stage of development ≈V12 was also site-specifi c. Relative CM readings (RY = −0.64 + 1.65 RCM if RCM ≤ 0.98 and RY = 0.97 if RCM > 0.98; R 2 = 0.60) and NNI (RY = −0.34 + 1.47 NNI if NNI ≤ 0.88 and RY = 0.96 if NNI > 0.88; R 2 = 0.79) at stage of development ≈V12 were related to RY. Th ese two relationships were stable across site-years and could be used to detect and quantify N defi ciencies of corn.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Chlorophyll Measurements and Nitrogen Nutrition Index for the Evaluation of Corn Nitrogen Status

et al. 2008

View full text Add to dashboard Cite

show abstract

“…The use of relative SPAD as a N nutrition diagnosis index was not affected by the cultivar, and the correlation coefficients for the relative SPAD vs. the relative yield were greater than SPAD vs. yield (Hawkins et al 2007, Ziadi et al 2008. It was concluded that the SPAD meter was more useful as a diagnostic aid, rather than a N-management tool for corn (Rashid et al 2005).…”

Section: Correlation Between Spad Readings and Corn Grain Yieldmentioning

confidence: 95%

The nutritional status and fluorescence characteristics of maize cultivars with different chlorophyll content and yields

Wang¹,

An²,

Li³

et al. 2019

Photosynt.

View full text Add to dashboard Cite

Chlorophyll (Chl) is generally positively related to corn grain yields; however, light-leaf-colored maize may also achieve high yields. Thus, Chl is seemingly not a key parameter for maize producers. Modern maize cultivars (55) were divided into four types, based on grain yields and ear leaf SPAD readings. The results revealed that there was no correlation between the SPAD readings and corn grain yields across different maize cultivars. High-yield maize possessed higher nitrogen, phosphorus, and potassium accumulation and utilization compared to that of low-yield maize; the N-transport efficiency of low yield and high SPAD was the lowest among various types of maize. Under normal conditions, parameters determining the high yield of maize in a sequence was leaf dry mass, Chl fluorescence indices, and light absorption flux per leaf cross section. A higher absorption flux, accompanied by high energy dissipation ratios, reduced the difference of trapped transport flux between high-SPAD and low-SPAD maize at high yield levels. At the low yield level, a higher absorption flux per reaction center compensated for the loss of PSII reaction center numbers in low-SPAD maize.

show abstract

“…Overall, both FIT and 75% FIT had NNI close to 1.0 from 83 DAP in both year, the 60% FIT, 50% FIT and the rainfed treatments sowed NNI values less than 1 from about 108 DAP toward the end of the growing season. Critical nutrient concentrations separate nutrient deficiency from nutrient sufficiency, but they vary with plant parts, physiological age, and environmental factors (Munson and Nelson, 1990;Westfall et al, 1990;Herrmann and Taube, 2004;Rashid et al, 2005). The onset of N deficiency occurred in mid-August (108 DAP) under limited irrigation and rainfed treatments when the crops reached the grain-filling stage (Figure 4).…”

Section: N O N -C O M M E R C I a L U S E O N L Ymentioning

confidence: 99%

Evaluation of critical nitrogen and phosphorus models for maize under full and limited irrigation conditions

Djaman

Irmak

2018

Italian Journal of Agronomy

View full text Add to dashboard Cite

Proper nitrogen (N) fertiliser application rates and timing of application, coupled with optimum irrigation management can improve the sustainability of maize production and reduce the risk of environmental contamination by nutrients. The impact of full and limited irrigation and rainfed conditions on in-season maize (Zea mays L.) shoot biomass nutrient concentration and critical N and phosphorus (P) indices were evaluated using a combination of measured nutrients and critical N and P models in south central Nebraska in 2009 and 2010. Four irrigation treatments [fully-irrigated treatment (FIT), 75% FIT, 60% FIT and 50% FIT) and rainfed] were imposed. Irrigation regimes impacted the shoot biomass N concentration. The shoot biomass N concentration was above the critical N (Ncrit) concentration throughout the growing season under FIT and 75% FIT and was below the Ncrit value for the most limited irrigation (60% FIT and 50% FIT) and rainfed treatments. Nitrogen nutrient index (NNI) varied from 0.68 to 2.0. Biomass N concentration was below Ncrit [i.e., NNI<1] from 105 days after planting (DAP) to harvest under rainfed and 50% FIT and from 114 DAP to harvest under 60% FIT. Overall, the FIT and the 75% FIT had NNI values greater than 1.0 throughout both growing seasons. Phosphorus concentration, which decreased with biomass accumulation and irrigation amounts, varied from 1.0 to 4.8 g kg -1 , with FIT having the highest biomass P concentration. The critical N model combined with NNI can be used to evaluate N and P in maize for in-season nutrient diagnosis under the conditions presented in this research.

show abstract

Predicting nitrogen fertilizer requirements for corn by chlorophyll meter under different N availability conditions

Cited by 33 publications

References 32 publications

Chlorophyll Measurements and Nitrogen Nutrition Index for the Evaluation of Corn Nitrogen Status

Chlorophyll Measurements and Nitrogen Nutrition Index for the Evaluation of Corn Nitrogen Status

The nutritional status and fluorescence characteristics of maize cultivars with different chlorophyll content and yields

Evaluation of critical nitrogen and phosphorus models for maize under full and limited irrigation conditions

Contact Info

Product

Resources

About