Effect of Copper (Cu) application on soil available nutrients and uptake

Abstract

Effects of annual spraying of copper (Cu) fungicide by cocoa farmers in Nigeria needs immediate investigation to avoid copper toxicity which will affect uptake of other essential nutrients for plant growth. Laboratory and Screenhouse studies were carried out to investigate the effects of Cu application on availability of P, Zn, Fe and growth of maize. In the laboratory, copper was applied as CuSO 4 at 0, 10, 20, 30, 40 and 50 mg Cu kg-1 to 100 g soil and left for 5 weeks for equilibration while in the Screenhouse, the same rate of Cu was thoroughly mixed with 1 kg soil in a plastic container. Maize was used as the test crop and growth parameters were monitored. Soil and tissue samples were analysed for Cu, P, Zn and Fe at the end of Laboratory and Screenhouse experiments. The experiment was arranged in a completely randomized design and replicated three times. Data obtained were subjected to analysis of variance; differences in means were tested using the Duncan Multiple Range Test. The results from Laboratory and Screenhouse experiments showed significant decrease in soil available P, Zn and Fe as rates of Cu increase over control experiment. The effect was more pronounced at application rate above 20 mg Cu kg-1. Gradual decrease in maize plant height, stem girth, leaf areas index, P, Zn and Fe uptake were observed as rate of Cu application increased. For instant, at application rate of 10 and 20 mgkg-1 , available P uptake was 5.49 mg/pot and 3.08 mg/pot respectively. The negative impact of Cu accumulation on available P was consistent in all the experiments. The result of the experiment clearly revealed strong negative impact of excess Cu on availabilities and uptake of P, Zn and Fe in soil.

Effect of Copper on Growth and Yield and Macro and Micro Nutrient Concentration of Rice (Oryza sativa. L) in Typic Haplustalf

“…The results align with the earlier reports that plants grown in alluvial soils of Uttar Pradesh respond to Cu application even if the soil is not deficient in available Cu (Mehrotra, 1993; Ratan Kumar et al, 2009;Scheiber et al, 2013). Reduced grain yield in low Cu plants is in accordance with the reports of Mateos-Naranjo et al, (2008) and Azeez et al, (2015). This is due to the reduction in the number of effective tillers, disturbed setting of grains and the production of rudimentary and blind panicles in such plants.…”

“…Previous results have also revealed that the excess Cu has very routinely accredited to an obtrusion with Fe metabolism. Ouzounidou (1994) and Azeez et al, (2015) reported that excess heavy metals may interrupt normal Fe metabolism and thus obvious to induce physiological Fe deficiency. However, Fe content in grain and straw at harvest stage with respect to different Cu levels increased up to 1.5 kg Cu ha -1 and decreased significantly with higher Cu level (2.5 and 3.0 kg ha -1 ).…”

Role of Mineral Micronutrient on some Qualitative Traits and Yield of Sweet Pepper Under Protected Cultivation System in Calcareous Soil

“…As for the average nutrients, all of them were significantly superior to the mean of the comparison treatment, as the highest value was for the treatment of Fe+Zn+Mn, which amounted to 149.31 Mg.h -1 , with an increase of 103.48% over the comparison average, while the lowest value was for the Zn+Cu treatment, which amounted to 92.26 Mg.h -1 , with an increase of 25.73% over the comparison average. It is noted from these results and from the table that the lowest values were for the treatments containing copper and for both methods of addition, especially those containing copper, zinc and manganese, one or both of them, which indicates the existence of an antagonistic relationship between the nutrients mentioned in addition to the negative role of copper in its effect on the readiness of phosphorus, zinc and iron in the soil Consequently, its absorbed by the plan and this turn leads to a decrease in productivity compared to other treatments, as mentioned by [31], and the positive effect of adding mineral micronutrients, whether sprayed on the vegetation or in addition with irrigation water, to increase the production of different crops has been shown by many researchers among them [32]. [33] and [34] who explained that although the addition of macronutrients in a way that fills the needs of the plant, in many researches these additions did not have a significant effect on increasing the production of the targeted agricultural crops due to the lack of available micronutrients, including mineral ones, in the soil, which It negatively affects the plant's need for these micronutrients, which is reflected in the failure to achieve the expected increase in production from the addition of macronutrients.…”

Mechanisms and Role of Nitric Oxide in Phytotoxicity-Mitigation of Copper

“…The accumulation of ions such as Na + and Cl − accumulated in plant organs may compete with mineral nutrients and also disturb their uptake, translocation, and assimilation (Keutgen and Pawelzik, 2008). Higher concentrations of Cu reduced the content of N, P, and K in both shoot and root of maize; however, increased therein the concentration of Fe (Ali et al, 2002;Azeez et al, 2015). In sand culture grown cauliflower, the supply of 0.5 mM Cu for 30 days decreased Fe concentration (Chatterjee and Chatterjee, 2000).…”