Effect of Applying Sunflower Residues as a Green Manure on Increasing Zn Concentration of Two Iranian Wheat Cultivars in a Pb and Cd Polluted Soil

Abstract

Journal homepage: www.zums.ac.ir/jhehp Background: This research was investigated to evaluate effect of applying sunflower residues as a green manure on increasing zinc (Zn) concentration of two Iranian wheat cultivars in a Pb and cadmium (Cd) polluted soil. Methods: Treatments included the application of sunflower residuals grown in a Znpolluted soil at two levels of 0 and 8 t/ha, two wheat cultivars in a soil contaminated with Pb (0, 400 and 800 mg Pb/kg soil) and Cd (0, 5 and 10 mg Cd/kg soil). After 7 months of the experiment. Plant Pb, Zn and Cd concentrations were measured using atomic absorption spectroscopy. Results: The highest root and shoot Zn concentration of wheat plant was belonged to the Back cross cultivar. Addition of 8 t/ha sunflower residues in soil without Pb and Cd pollution increased the root Zn concentration of Back Cross and Kavir cultivars by 12 and 16%, respectively. The highest and lowest Zn translocation factor of wheat plants was belonged to Back Cross and Kavir cultivars, respectively. Conclusion: Applying sunflower residues has a significant effect on increasing plant Zn concentration and can be useful as a suitable way to increase Zn concentration of wheat grown in Zn deficient and heavy metal polluted soils.

Neighbor Presence of Plant Growth-promoting Rhizobacteria (PGPR) and Arbuscular Mycorrhizal Fungi (AMF) Can Increase Sorghum Phytoremediation Efficiency in a Soil Treated with Pb Polluted Cow Manure

“…Previous studies have denoted the interactive effects of heavy metals on nutrients such as Fe or Zn [23], which is consistent with our findings. It is notable that although PGPR and AMF reduced the plant Pb concentration by increasing its Fe availability (interactive effect), the role of soil microorganism activities in increasing plant Pb resistance and phytoremediation efficiency cannot be overlooked.…”

“…Therefore, it could be concluded that the presence of PGPR significantly lowered the soil pH (0.2 unit) as opposed to the control soil. Previous studies have also denoted increased soil Pb availability due to the reduction of soil pH [16,23]. It is also notable that the primary concentrations of the heavy metals in the cow manure were lower than the standard values suggested by the US Environmental Protection Agency [24].…”

Allelopathic effect of sunflower residues on some soil properties and growth parameters of wheat, bean and flax crops

“…This comes as an expected result of the response to improving the soil with the necessary elements needed by the wheat crop, which helped in its healthy development and growth, thus improving yield and quality. The current results are consistent with (12,13), who mentioned that the wheat crop is suitable for cultivation under sunflower allelopathic stress. The results of the broad bean and flax crop response came to the exact opposite of the results achieved in the wheat crop, as shown in Tables 3 and 4.…”

Aplikasi Limbah Daun Trembesi (Samanea saman Jacq Merr) Sebagai Pupuk Hijau Terhadap Pertumbuhan Tanaman Bunga Matahari (Helianthus anuus L.)

“…Penambahan serasah pohon sebagai pupuk hijau bersamaan dengan pemberian pupuk anorganik memberikan hasil padi yang jauh lebih tinggi daripada pupuk anorganik saja (Hossain et al, 2007). Aplikasi seresah bunga matahari berpengaruh nyata terhadap peningkatan konsentrasi Zn tanaman dan dapat berguna sebagai cara yang cocok untuk meningkatkan konsentrasi Zn gandum yang tumbuh di tanah yang kekurangan Zn dan tercemar logam berat (Baghaie et al, 2019). Pupuk hijau dari tanaman Tithonia diversifolia terbukti mampu memperbaiki kualitas tanah dan meningkatkan hasil tanaman kembang kol dan tanaman melon (Pia et al, 2020).…”

“…Seresah atau limbah tanaman secara umum dapat dimanfaatkan sebagai penyubur tanah atau untuk memulihkan kesehatan tanah. Pemanfaatan seresah atau sisa-sisa tanaman memiliki pengaruh yang signifikan terhadap peningkatan konsentrasi Zn tanaman dan dapat berguna sebagai cara yang cocok untuk meningkatkan konsentrasi Zn gandum yang tumbuh di tanah yang kekurangan Zn (Baghaie et al, 2019). Studi menunjukkan bahwa aplikasi pupuk hijau meningkatkan pertumbuhan, hasil dan parameter hasil yang sebanding dengan aplikasi pupuk NPK.…”