The nitrogen content of corn grain as affected by hybrid, population, and location

Boone, L. V.; Vasilas, B. L.; Welch, L. F.

doi:10.1080/00103628409367504

Cited by 8 publications

(15 citation statements)

References 2 publications

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“…This conclusion supports the thesis developed by Boone et al (1984), who found that grain N yield is more closely correlated with grain yield than with percentage of kernel N. Nitrogen is considered as the most important nutrient for high grain yield on one hand, but as a nutrient potentially threatening to the environment, on the other hand. Therefore several attempts were undertaken for lowering its applied rates, mostly under agricultural ecosystems.…”

Section: Resultssupporting

confidence: 79%

Effect of magnesium or zinc supplementation at the background of nitrogen rate on nitrogen management by maize canopy cultivated in monoculture

Potarzycki¹

2011

Plant Soil Environ.

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In five consecutive growth seasons from 2003 to 2007 a response of maize variety Eurostar (var. FAO 240) to supply of NPK fertilizer supplemented with magnesium or zinc was investigated. The aim of the study was to evaluate the role of zinc (NPK + Zn) or magnesium (NPK + Mg) in controlling nitrogen management by maize crop fertilized with 80 and 140 kg N/ha. In the course of the study, total grain nitrogen content did not show any response to both experimental factors and weather variability, as well. However, the obtained results indicate, that magnesium and zinc have significantly increased SPAD (chlorophyll index) indices of maize cob leaf at anthesis. A significant effect of both factors interaction on nitrogen accumulation in grain and cob covering leaves was noted, but limited to the 80 kg N/ha treatment. The physiological role of Mg and Zn in nitrogen management was most manifested throughout its greater recovery from nitrogen fertilizer applied at the rate 80 kg N/ha, amounting to 92 and 94% respectively; for the NPK, it was only 78%.

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Section: Resultssupporting

confidence: 79%

Effect of magnesium or zinc supplementation at the background of nitrogen rate on nitrogen management by maize canopy cultivated in monoculture

Potarzycki¹

2011

Plant Soil Environ.

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“…Early in the 1970s, Welch (1971) used an average GNC of 1.61% to estimate grain-N removal. Later, Boone et al (1984) reported a mean of 1.33% based on measured data across commercial maize hybrids grown in the Midwestern US at different plant densities. A review paper by Ciampitti and Vyn (2012) reported the same mean GNC of 1.33% for maize hybrids released between 1940 to 1990, with mean GNC decreasing to 1.20% for hybrids released between 1991 and 2011.…”

Section: Introductionmentioning

confidence: 99%

Assessing variation in maize grain nitrogen concentration and its implications for estimating nitrogen balance in the US North Central region

Tenorio

Eagle

McLellan

et al. 2019

Field Crops Research

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Accurate estimation of nitrogen (N) balance (a measure of potential N losses) in producer fields requires information on grain N concentration (GNC) to estimate grain-N removal, which is rarely measured by producers. The objectives of this study were to (i) examine the degree to which variation in GNC can affect estimation of grain-N removal, (ii) identify major factors influencing GNC, and (iii) develop a predictive model to estimate GNC, analyzing the uncertainty in predicted grain-N removal at field and regional levels. We compiled GNC data from published literature and unpublished databases using explicit criteria to only include experiments that portray the environments and dominant management practices where maize is grown in the US North Central region, which accounts for one-third of global maize production. We assessed GNC variation using regression tree analysis and evaluated the ability of the resulting model to estimate grain-N removal relative to the current approach using a fixed GNC. Across all site-year-treatment cases, GNC averaged 1.15%, ranging from 0.76 to 1.66%. At any given grain yield, GNC varied substantially and resulted in large variation in estimated grain-N removal and N balance. However, compared with GNC, yield differences explained much more variability in grain-N removal. Our regression tree model accounted for 35% of the variation in GNC, and returned physiologically meaningful associations with mean air temperature and water balance in July (i.e., silking) and August (i.e., grain filling), and with N fertilizer rate. The predictive model has a slight advantage over the typical approach based on a fixed GNC for estimating grain-N removal for individual site-years (root mean square error: 17 versus 21 kg N ha−1, respectively). Estimates of grain-N removal with both approaches were more reliable when aggregated at climate-soil domain level relative to estimates for individual site-years.

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“…As this approach was taken to real-world situations, reports appeared of confounding factors. Plant population, for example, is itself a determinant of crop nutrient concentration, with higher populations generally associated with lower nutrient concentrations (Zuber et al, 1954;Ahmadi et al, 1993b;Boone et al, 1984). Differences in grain N concentration among hybrids has also been recorded (Zuber et al, 1954;Tsai et al, 1983;Ahmadi et al, 1993a) although these differences are not always consistent from one site-year to another (Boone et al, 1984).…”

Section: Grain Nitrogen Responsementioning

confidence: 99%

“…Plant population, for example, is itself a determinant of crop nutrient concentration, with higher populations generally associated with lower nutrient concentrations (Zuber et al, 1954;Ahmadi et al, 1993b;Boone et al, 1984). Differences in grain N concentration among hybrids has also been recorded (Zuber et al, 1954;Tsai et al, 1983;Ahmadi et al, 1993a) although these differences are not always consistent from one site-year to another (Boone et al, 1984). Grain nitrogen content can also be influenced by climatic conditions like moisture availability (Boone, et al, 1984;Killom and Zourarakis, 1990) and summer temperature (Zuber et al, 1954) that affect plants' growth potential or ability to translocate nutrients and photosynthate to the grain.…”

Section: Grain Nitrogen Responsementioning

confidence: 99%

“…Pierre et al (1977b) elaborated a method for determining com fertilizer nitrogen needs based on this relationship. Others did not take the theory this far, but reports of critical level determinations (Asghari and Hanson, 1984;Boone et al, 1984) are not uncommon in the crop science research of this period. Pierre et al (1977b) acknowledged curvilinear relationships between crop N requirements and relative yields.…”

Section: Grain Nitrogen Responsementioning

confidence: 99%

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Productivity and profitability of strip intercropping systems as implemented by agronomists and farmers

Exner¹

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The nitrogen content of corn grain as affected by hybrid, population, and location

Cited by 8 publications

References 2 publications

Effect of magnesium or zinc supplementation at the background of nitrogen rate on nitrogen management by maize canopy cultivated in monoculture

Effect of magnesium or zinc supplementation at the background of nitrogen rate on nitrogen management by maize canopy cultivated in monoculture

Assessing variation in maize grain nitrogen concentration and its implications for estimating nitrogen balance in the US North Central region

Productivity and profitability of strip intercropping systems as implemented by agronomists and farmers

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