Phosphorus‐induced Zinc Deficiency in Wheat on Residual Phosphorus Plots¹

Abstract

One-time heavy application of P on certain soils can provide sufficient available P to sustain crop production over a period of several years, but may cause Zn nutritional problem for crops. A field study was conducted to determine tbe effect of applied Zn on wheat (Triticum aestivum L.) grown on residual P plots and identify tbe mechanism of P X Zn interaction. This study was conducted in 1984 in a continuous wheat system on a clayey, mixed, frigid Typic Hyploboroll soil that bad received 0, 80, and 160 kg P ba -• in 1979. Three experiments were carried out using a split plot randomized complete block design with three levels of P as m~in plots and rates of soilapplied Zn-sulfate (0, S, 10, and 20 kg Zn ba-•) or Zn-cbelate (0, 0.5, 1.0, and 2.0 kg Zn ba-1 ) or foliar-applied Zn-cbelate (0 and 0.35 kg Zn ba-•) as subplots. A one-time application of 80 or 160 kg P ba-• increased wheat yield significantly. In the presence of P, application of Zn resulted in significant increase in grain yield and Zn uptake into grain. Applied P increased soil P levels and tissue P concentration, but resulted in a significant decrease of tissue Zn levels. DTP A ( dietbylenetriaminepentaacetic acid )-extractable soil Zn levels in the non-Zn-amended treatment were independent of P application rate. Plant roots in bigb P treatments contained significantly lower levels of vesicular-arbuscular mycorrhizal (V AM) infection than tbe control. Further, a close relationship was observed between Zn levels in tbe aboveground plant parts and V AM infection.AdditioiUll index words: Phosphorus X Zinc interaction, Vesiculararbuscular mycorrbizae, Triticum aestivum L., Zinc-sulfate, Zincchelate.' Publication no. R446 of the Saskatchewan Inst. of Pedology.

Growth responses and cadmium accumulation of Mirabilis jalapa L. under interaction between cadmium and phosphorus

“…According to Karblane [11], and He and Singh [12], it was showed that phosphate inhibited Cd uptake in the pot-culture studies with different corps. On the contrary, phosphate has also been shown to increase plant uptake [13]. Moreover, interaction of Cd and phosphate was investigated under hydroponics.…”

Evaluation of elemental allelopathy in Acroptilon repens (L.) DC. (Russian Knapweed)

“…Therefore, supplementing Fe uptake has been found to reduce stress caused by high Zn (Kaya and Higgs 2001). Although the mechanism is not entirely understood, high amounts of phosphorus (P) have been found to reduce Zn activity in plant tissue, even to the point of inducing Zn deficiency (Singh et al 1986). Iron oxides, when applied to the soil, have been shown to reduce uptake of all metals by immobilizing them in the soil (Lombi et al 2002).…”

Nutrient Availability to Corn From Dairy Manures and Fertilizer in a Calcareous Soil

“…The overapplication of P and P accumulation in soils has the potential to create deficiencies and toxicities of other nutrients as well. For example, several research studies have shown that Zn deficiencies can be induced with excessively high concentrations of P fertilizer in the soil (Singh et al, 1988;Cakmak and Marschner, 1986;Singh et al, 1986). Manure additions also tend to have a liming effect in most soils as large amounts of Ca and Mg are added with the manures (Eghball et al, 2004;Mokolobate and Haynes, 2002).…”