جستجوی مقالات مرتبط با کلیدواژه « پودر استخوان » در نشریات گروه « آب و خاک »

Soil contamination by Pb leads to a reduction in the quality and quantity of crop yield, because it is highly toxic in soluble ionic forms. The availability of this element for plant roots can reduce by the formation of compounds with low solubility and their sedimentation by phosphorous amendments.. Root symbiosis with mycorrhizal fungi can also increase plant resistance against heavy metals. This study was carried out as a factorial experiment in a randomized complete block design asa greenhouse experiment on sunflower plant at Shahrood University. Treatments included mycorrhizal fungi with two levels of inoculation, (with and without inoculation), organic and inorganic phosphorous fertilizers such as humic acid, diammonium phosphate, bone meal and bone meal蛩 acid. The results showed that inoculation with mycorrhizal fungi resulted in a significant increase (P&ge0.05) in percentage of mycorrhizal colonization and an increase in soil EC,shootdry weight and phosphous uptake by the plant. Phosphorus fertilizers significantly increased the available phosphorus in soil, dry weight and uptake of phosphorus by the shoots. The interaction effects of mycorrhiza and phosphorus fertilizers on soil exchange able Pbwere significant. The application of diammonium phosphate and mycorrhiza had the greatest impacton the reduction of Pb (by 25.48percent) in the soil exchange. Mycorrhizal plants had a lower rate of lead concentrations in shoots, which was equal to 78/14%, and also the application of phosphorus fertilizers significantly reduced Pb in plant shoots.

Bone meal contains a large amount of phosphorus that could almost supply the phosphorus needs of crops. The main objective of this study was to determine the capability of bone meal for releasing phosphorus and its effect on growing corn. An experiment was conducted in a completely randomized design with three replications under laboratory and greenhouse conditions with 6 treatments including 400 and 800kg.ha-1 ordinary bone meal, 400 and 800kg.ha-1 acidulated bone meal, 200kg.ha-1 triple super phosphate, and control. The results demonstrated that in treatments with ordinary bone meal, phosphorus release had 30 days lag compared with triple super phosphate. Acidulation of bone meal caused faster and more release of phosphorus. The experiment also revealed that acidulated bone meal did not change the concentration of phosphorus in the shoot. However, shoot dry matter weight and phosphorus uptake by corn were significantly higher in acidulated vs ordinary bone meal. But, compared to the chemical fertilizer, their differences were not statistically significant.