Plant availability of boron doped on iron and manganese oxides and its effect on soil acidosis

EFFECT OF BORON-DOPED GOETHITE ON SOIL ACIDITY, DIFFERENT FORMS OF MANGANESE IN RED SOIL AND THE GROWTH OF RAPE (BRASSICA NAPUS L.) SEEDLINGS

“…Briefly, a solution of 0.150 mol L −1 iron nitrate [Fe (NO 3 ) 3 ] was prepared to which sodium hydroxide (NaOH) was added by titration at a constant rate of 5 mL min −1 to a concentration of 2.5 mol L −1 NaOH corresponding to a solution pH of 11.9. The solution was then stored in a covered polyethylene bottle at 60 • C for 48 h. All resulting suspensions were centrifuged, filtered and washed repeatedly with deionized water to conductivity < 1 × 10 2 µs cm −1 (Ren et al, 2009).…”

“…Adsorbed-boron-goethite (ad-B-goethite) and occlude-boron-goethite (oc-B-goethite) were prepared according to the method of Liao et al (2007) and Ren et al (2009). The ad-B-goethite was prepared by the addition of 0.01 mol L −1 borax solution to the original goethite ( solid:liquid mass of 1:5 ) and shaken for 24 h at room temperature.…”

“…The ad-B-goethite was prepared by the addition of 0.01 mol L −1 borax solution to the original goethite ( solid:liquid mass of 1:5 ) and shaken for 24 h at room temperature. All resulting suspensions were centrifuged, filtered and washed repeatedly with deionized water to conductivity < 1 × 10 2 µs cm −1 (Ren et al, 2009). The preparation of oc-B-goethite was similar to the synthesis of goethite, but the alkali addition consisted of a mixture of 0.75 mol L −1 boric acid and 2.5 mol L −1 NaOH.…”

“…Two kinds of boron-doped goethite named as ad-B-goethite (boron adsorbed on goethite) and oc-B-goethite (boron occluded in goethite) were synthesized and their structure and properties were reported by Wang et al (2006), Liao et al (2007) and Ren et al (2009). Boron covered the surface of ad-B-goethite maintaining the characteristic of α-FeOOH or may enter the lattice of oc-B-goethite, which may be a different mineral (Liao et al, 2007).…”

Plant Availability of Boron Adsorbed or Occulted on Goethite to Rape (Brassica napusL.) Seedling

“…Water and nutrient uptake efficiency depend largely on root growth and architecture (Bouma, Nielsen, and Koutstaal 2000). The previous study found that the nutrient content of the soil treated with ad-B-goethite and oc-B-goethite was significantly greater than those treated with goethite, especially for Ca and Mg. A linear regression showed that Ca and Mg contents in the soil were significantly correlated with rape seedling dry weight (Ren et al 2009). Also, these changes in soil nutrient content were related to soil acidity.…”