The effect of rate and Cd concentration of repeated phosphate fertilizer applications on seed Cd concentration varies with crop type and environment

Grant, C. A.; Flaten, Don; Tenuta, Mario; Malhi, S. S.; Akinremi, Wolé

doi:10.1007/s11104-013-1691-3

Cited by 34 publications

(22 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1 (Grant et al 2013). The area used had been sown to flax in the previous year of the study, and so it was expected to have abundant mycorrhizal inoculum.…”

Section: Methodsmentioning

confidence: 99%

Variation in potassium and calcium uptake with time and root depth

McGonigleT.

GrantC.

2015

Can. J. Plant Sci.

View full text Add to dashboard Cite

McGonigle, T. P. and Grant, C. A. 2015. Variation in potassium and calcium uptake with time and root depth. Can. J. Plant Sci. 95: 771Á777. Root uptake of calcium (Ca) and potassium (K) with depth in soil and through time are of interest not only as fundamental processes of plant physiology but also for the practical application of crop management. For K specifically, depth of band placement for fertilizer should be optimized for crop uptake. Environmentally rare strontium (Sr) and rubidium (Rb) are used as root activity tracers for Ca and K, respectively. We applied Sr and Rb to field microplots at depths 0Á5 cm, 5Á10 cm, and 10Á15 cm. Tracer application throughout the entire rooting volume for a given depth interval eliminated confounding effects of age-related lateral root spread seen with point application. Soil analyses confirmed there was no within-profile movement of amendments. Maize (Zea mays L.) shoot Sr concentration was greatest at 16 d of growth for amendment to 0Á5 cm, in keeping with expected restriction of Ca uptake to root tips. In contrast, maximum shoot Rb concentration was at 24 d and with amendment to 5Á10 cm, indicating more proximal root uptake of K. Uptake of Sr and Rb was sustained for a longer period from 5 to 15 cm than from 0 to 5 cm, so that most of the Ca and K in shoots likely comes from this greater depth interval. Soil pasteurization reduced colonization by arbuscular mycorrhizal fungi but had no impact on tracer uptake, indicating these fungi do not influence uptake of Ca and K. Studies on maize root activity using Sr and Rb should apply tracers in the 5-to 15-cm depth interval and harvest shoots between 3 and 7 wk after planting. Based on Sr uptake, determination of soil Ca levels to predict early-season uptake by maize should focus on the 5-to 15-cm depth interval. Based on Rb uptake, banded application of K fertilizer is expected to be most effective to promote early-season growth when band placement is within 5-to 15-cm depth.Key words: Strontium, rubidium, tracer, mycorrhiza, calcium, potassium McGonigle, T. P. et Grant, C. A. 2015. Variation de l'absorption du potassium et du calcium avec le temps et la profondeur des racines. Can. J. Plant Sci. 95: 771Á777. La variation de l'absorption du calcium (Ca) et du potassium (K) par les racines en fonction de leur profondeur et du temps pre´sente de l'inte´reˆt non seulement en tant que processus fondamental en physiologie ve´ge´tale, mais aussi sur le plan pratique, en gestion agricole. En ce qui concerne le K, spe´cifiquement, il conviendrait d'optimiser la profondeur a`laquelle on applique l'engrais en bandes late´rales afin que la culture l'absorbe mieux. Le strontium (Sr) et le rubidium (Rb), deux e´le´ments rares dans la nature, ont respectivement e´te´employe´s comme traceurs pour ve´rifier l'activite´des racines en rapport avec le Ca et le K. Les auteurs ont applique´du Sr et du Rb a`une profondeur de 0Á5 cm, de 5Á10 cm et de 10Á15 cm sur des micro-parcelles, au champ. L'application du traceur a`la masse de racines, dans ...

show abstract

“…(1 (Grant et al 2013). The area used had been sown to flax in the previous year of the study, and so it was expected to have abundant mycorrhizal inoculum.…”

Section: Methodsmentioning

confidence: 99%

Variation in potassium and calcium uptake with time and root depth

McGonigleT.

GrantC.

2015

Can. J. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…There were minor changes in plant Cd concentration with increased Cd input. Although year to year variability in plant Cd concentration could be associated with dilution/ concentration effect as observed by Grant et al [8] where the highest annual Cd concentration in the control treatments was associated with the lowest annual grain yield. This seems not to be the case in the present study because control plots with generally lower yield (Table 3) showed higher Cd concentration.…”

Section: Change In Plant CD Concentration and Uptakementioning

confidence: 75%

“…The Cd treatment had no significant effect on yield and hence annual yields are grouped for each pH treatments. Grant et al [8] also did not find any effect of moderate Cd applications on grain yield of durum wheat or flax. The exceptional high yield in 1995 was compared with meteorological data from the area, and generally was the summer 1992 dry (average 2.0 mm during June and July) and temperature low during growth season (June and July, oscillating around 16.8°C).…”

Section: Grain Yieldmentioning

confidence: 92%

“…Therefore, the soil distribution coefficient (K d ), increases with increasing pH, while phytoavailability correspondingly decreases [50,51]. Low soil pH contribute to greater plant availability of the Cd present in the soil [8]. Since pH is an important factor controlling the geochemistry of Cd, pH was tested against Cd uptake.…”

Section: Plant Cadmium Concentrationmentioning

confidence: 99%

“…When we apply phosphorus fertilizer to our cropland, trace element, especially Cd, also enter soil as fertilizer contaminants [8,9]. The amount of Cd taken up by an individual plant depends on the amount of bioavailable Cd present in the soil [10] and the physiological and morphological characteristics of the plant [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations