Nitrogen Partitioning in Maize during Ear Development

Ta, Chanh T.; Weiland, R. T.

doi:10.2135/cropsci1992.0011183x003200020032x

Cited by 153 publications

(123 citation statements)

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“…There are two sources of N for grain growth: concurrently absorbed N from the soil during post-silking and remobilization from pre-silking accumulated N of vegetative tissues (Ta and Weiland, 1992;Chen et al, 2014c). In the present study, N accumulation amounts during post-silking stage and pre-silking N uptake by SP treatment were both significantly decreased.…”

Section: Discussionmentioning

confidence: 99%

Plough Pan Impacts Maize Grain Yield, Carbon Assimilation, and Nitrogen Uptake in the Corn Belt of Northeast China

Cao

Yang

et al. 2017

Emir J Food Agric

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This study aims to investigate the responses of carbon assimilation, grain yield, leaf stay-green rate, nitrogen uptake and distribution to soil compaction in the hard plow pan caused by repeated use of tractor-driven cultivator in Northeast China. The typical hybrid maize variety “Zhengdan 958” was exposed to two treatments of simulated plow pan (SP) and simulated subsoiling (SS, control) in pot experiments from 2012 to 2014. Compared with SS, SP significantly reduced net photosynthetic rate (Pn) during growth stage, leading to a decrease in dry matter accumulation (DMA) and grain yield (GY) in three consecutive experimental years. Leaf stay-green degrees (LSD), which showed a fast descending trend from 20 days after silking (DAS), significantly decreased in the later filling stage under SP treatment. The translocation eﬃciency of the stored N (TEN) in stalk and leaf to the grain during pre-silking was enhanced, whereas leaf and grain N concentration (LNC/GNC), together with N accumulation amounts at maturity were significantly reduced under SP treatment. Also, plough pan reduced the N distribution to the organs of stalk, leaf and grain. In conclusion, subsoiling is a possible way to delay leaf senescence and achieve higher DMA and GY, and increased grain N in the corn belt of Northeast China.

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Section: Discussionmentioning

confidence: 99%

Plough Pan Impacts Maize Grain Yield, Carbon Assimilation, and Nitrogen Uptake in the Corn Belt of Northeast China

Cao

Yang

et al. 2017

Emir J Food Agric

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“…This element is closely linked to the production of important constituent proteins for embryo initial development during seeds germination, with great effects on grain yield. For grain filling, two sources of nitrogen are used, one originated from soil absorption and the other from remobilization of vegetative tissues (Ta & Weiland, 1992).…”

Section: Nitrogen (N)mentioning

confidence: 99%

“…In case of abiotic stresses due to drought or nitrogen deficiency, there is a possibility of remobilizing this element from vegetative tissues to the grains (Ta & Weiland, 1992;Carvalho et al, 2013). Research by Carvalho and Nakagawa (2012) defines that nitrogen influence seeds physiological quality, however their effects depend on environmental conditions and plant development stage.…”

Section: Nitrogen (N)mentioning

confidence: 99%

Macronutrients and Micronutrients Variability in Soybean Seeds

Vargas¹,

Schuch²,

Barros³

et al. 2018

JAS

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The objective of this work was to evaluate the chemical composition of the macronutrients: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and sulfur (S), and micronutrients: boron (Cu), iron (Fe), manganese (Mn), molybdenum (Mo) and zinc (Zn), and the elements aluminum (Al) and sodium (Na) measured in soybean seeds from different producing regions of Brazil. This work was carried out by sampling 2543 lots of soybean seeds produced in the 2009, 2010, 2011 and 2012 growing seasons. There is high variability of macro and micronutrients concentration in soybean seeds produced in several regions of Brazil. The nitrogen, potassium, phosphorus, and calcium are the most pronounced macronutrients in soybean seeds. Among the micronutrients, iron, manganese and zinc are those with more evidence. Understanding macro and micronutrients variability is critical for improving management and fertility treats in soybean seed production fields.

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“…The N required for developing ears and grain-filling was predominantly contributed by root absorption from soil at vegetative stages. Ta and Weiland (1992) reported that during anthesis and grain filling stages, even though roots continued to take up N from the soil, up to 90% of N required for the ear development Can. J.…”

Section: Grain Yield and Stover Dry Mattermentioning

confidence: 99%

Effect of in-season application methods of fertilizer nitrogen on grain yield and nitrogen use efficiency in maize

L.¹,

Li²,

Dwyer³

et al. 2004

Can. J. Soil. Sci.

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of in-season application methods of fertilizer nitrogen on grain yield and nitrogen use efficiency in maize. Can J. Soil Sci. 84: 169-176. Little information is available comparing agronomic performance and nitrogen use efficiency (NUE) for N application methods such as foliar spray, soil application, and ear injection in maize (Zea mays L.). The objective of this study was to investigate the effects of various N application methods on total stover dry matter, grain yield, and NUE of maize hybrids using a 15 N-labeling approach. A field experiment was conducted on a Dalhousie clay loam in Ottawa and a Guelph loam in Guelph for 2 yr (1999 and 2000). Three N application methods were tested on two maize hybrids, Pioneer 3893 and Pioneer 38P06 Bt. At planting, 60 kg N ha -1 as ammonium nitrate was applied to all treatments. In addition, 6.5 kg N ha -1 and 13.5 kg N ha -1 as 15 N-labeled urea were applied to either foliage (Treatment I) or soil (Treatment II) at V6 and V12 stages, respectively. In Treatment III, 20 kg N ha -1 as 15 N-labeled urea was injected into space between ear and husks at silking. The results showed that compared with soil N application neither foliar spray nor injection through ear affected grain yield or stover dry matter. The NUE values ranged from 12 to 76% for N fertilizer applied at V6 and V12 stages, or at silking for all treatments. There was no interaction of hybrid × N application methods on any variables measured with the only exception that for soil N application, grain NUE in Pioneer 38P06 Bt was significant higher than in Pioneer 3893. The difference in total N and NUE of grain and stover between soil N application and foliar N spray was inconsistent. However, NUE was substantially higher for N injection through the ear than for foliar or soil application without differential responses between the two hybrids. Nitrogen injection through the ear at silking might have altered N redistribution within the plant and improved NUE. Hence, it can potentially enhance grain protein content. Foliar N spray is not advocated for maize production in Ontario. Néanmoins, l'injection d'engrais dans l'épi aboutit à un degré d'assimilation du N sensiblement plus élevé que les applications foliaires ou l'épandage au sol, sans que la réaction des deux hybrides varie. Il se pourrait que l'injection d'azote dans l'épi à la floraison modifie la redistribution du N dans la plante et améliore l'assimilation. Par conséquent, cette méthode pourrait accroître la teneur du grain en protéines. On ne préconise pas les applications foliaires de N pour la culture du maïs en Ontario.

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Nitrogen Partitioning in Maize during Ear Development

Cited by 153 publications

References 0 publications

Plough Pan Impacts Maize Grain Yield, Carbon Assimilation, and Nitrogen Uptake in the Corn Belt of Northeast China

Plough Pan Impacts Maize Grain Yield, Carbon Assimilation, and Nitrogen Uptake in the Corn Belt of Northeast China

Macronutrients and Micronutrients Variability in Soybean Seeds

Effect of in-season application methods of fertilizer nitrogen on grain yield and nitrogen use efficiency in maize

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