Effect of phosphate on the sorption, desorption and plant-availability of selenium in soil

He, Zhenli; Yang, Xiaoe; Zhu, Z. X.; Qinzheng, Zhang; Xia, Weiliang; Tan, Jian'an

doi:10.1007/bf00750246

Cited by 8 publications

(8 citation statements)

References 17 publications

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“…The constant related to bonding energy of Se (Table 1) also decreased by 33 to 66% in different soils. In three soils from China (Inceptisol, Ultisol, and Alfisol), Se sorption decreased by 30 to 70 per cent due to the addition of PO 4 -P at 5 mg cm ±3 (He et al, 1994). Neal et al (1987) observed that addition of approximately 2 mmol Na 3 PO 4 kg ±1 to the soil suspensions resulted in a clear decrease of the amount of selenite adsorbed and it was over the entire selenite adsorption envelope.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Selenium adsorption in soils as influenced by different anions

Dhillon¹,

Dhillon

2000

J. Plant Nutr. Soil Sci.

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Studies on selenium adsorption were conducted on seleniferous and non‐seleniferous soils of north‐west India. Soils were equilibrated with graded levels of Se ranging from 1 to 100 μg ml—1 tagged with 75Se in the presence of sulphate, nitrate and phosphate ions, generally being applied to soils as inorganic fertilizers. The adsorption of Se on different soils, both in the presence and absence of competing anions, increased with increase in the level of Se added. Adsorption of Se conformed to Langmuir equation. In the absence of any competing anions, adsorption maxima of Se for different soils ranged from 270 to 461 μg g—1. The corresponding values decreased appreciably in the presence of competing anions; per cent decrease ranged from 3 to 21 at 10 μg SO4‐S ml—1, from 8 to 40 at 60 μg NO3‐N ml—1 and 32 to 56 at 15 μg H2PO4‐P ml—1. The bonding energy of Se in different soils decreased by 33 to 66 per cent in the presence of only phosphate ions. The changes in bonding energy were inconsistent in the case of nitrate and sulphate ions. At equal concentration of added P and Se, the amount of P adsorbed was 2 to 3 times the amount of Se adsorbed. With increasing concentration of Se, greater amounts of S were released in the equilibrium solution. The distribution coefficients (Kd) decreased significantly in the presence of different anions; the effect was conspicuous in the case of phosphate ions.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Selenium adsorption in soils as influenced by different anions

Dhillon¹,

Dhillon

2000

J. Plant Nutr. Soil Sci.

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“…Dose of Se (kg.ha Results published by Vinay-Singh and Malik (1990), Kopsell et al (2000) and He et al (1994) showed that the phosphorus content in plants decreased with increasing selenium treatments. This corresponds with our results saying that with higher doses of selenium the phosphorus content decreased in both tops and tubers.…”

Section: Iii: the Sulphur Content (% Dm) In Potatoesmentioning

confidence: 99%

“…The interaction between selenium and phosphorus was evident (Liu et al, 2004). He et al (1994) found out that applied P decreased selenite sorption by ryegrass and that P sorption decreased with an increasing concentration of Se in the initial solution. El Ghanam (2004) found that P uptake by soybeans was signifi cantly but negatively aff ected by increasing levels of applied Se.…”

mentioning

confidence: 99%

The effect of selenium application to the soil on the sulphur and phosphorus content in potatoes

Zemková¹,

Hlušek²,

Lošák³

et al. 2014

Acta Univ. Agric. Silvic. Mendelianae Brun.

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ZEMKOVÁ, Ľ., HLUŠEK, J., LOŠÁK, T., JŮZL, M., ELZNER, P.: The eff ect of selenium application to the soil on the sulphur and phosphorus content in potatoes. Acta univ. agric. et silvic. Mendel. Brun., 2008, LVI, No. 5, pp. 243-250 In a small-plot trial with potatoes were applied increasing doses of selenium to the soil (0, 12, 24, 48 and 72 kg Se . ha ) and a er harvest were explored the content of selenium, phosphorus and sulphur in raw tubers and in the tops. The trials were conducted in two localities -Žabčice and Valečov using the semi-early variety Ditta. Selenium was applied to the soil in the form of sodium selenite before planting the potatoes. Chemical analyses discovered that with the applied dose the level of se lenium increased in both tubers and tops and that the correlation between the applied selenium dose and its content in tubers and tops was signifi cant (α < 0.05) and positive (r = 0.885 and r = 0.908, respectively). With an increasing dose of selenium the reduction in the level of sulphur in the tops (r = −0.872, α < 0.05) was statistically signifi cant. In both localities the range of the sulphur levels in tubers was very narrow, i.e. 0.16-0.18%, and the eff ect of the selenium dose was not signifi cant. The phosphorus content in tubers and tops did not change signifi cantly a er application of a dose of up to 48 kg Se . ha −1. With the highest dose of selenium the content of phosphorus in both tops and tubers decreased signifi cantly.

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“…Based on the Langmuir model, monolayer adsorption capacity of various clay minerals follows the sequence: oxides > 1:1 layer silicates > 2:1 layer silicates, and among the oxides the order was Fe 2 O 3 (1773 mg kg À1 ) > MnO 2 (1318 mg kg À1 ) > Al 2 O 3 (1144 mg kg À1 ) [35]. The 2:1 layer silicates such as montmorillonite and vermiculite showed a relatively small capacity of Se sorption, likely due to some oxide coating or through cation bridging to the surface, as was found with phosphate sorption [36]. The sorption of Se in soil generally decreases with increasing pH, because an increase in pH increases negative charge to both the surface and Se anions, thus enhancing the repulsion between them.…”

Section: +Oh -mentioning

confidence: 99%

“…Addition of phosphate at 5 mg l À1 was found to reduce selenite adsorption by 30-70% [36]. This is important in agricultural management as P fertilization potentially enhances both plant Se uptake and Se leaching loss from soils [38,39].…”

Section: +Oh -mentioning

confidence: 99%