Studies on the magnesium metabolism of crops (Part 1) the balance among magnesium, calcium and pot assLum in free and bound forms at the flowering stage of soy-bean plants

Hashimoto, Takeshi

doi:10.1080/00380768.1956.10431871

Cited by 2 publications

(1 citation statement)

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“…The inhibition of Mg uptake from K fertilisation reduced leaf tissue concentrations of Mg and the development of bacterial spots in tomato plants (Engelhard & Woltz, 1989). Moreover, the Ca:Mg ratio in the culture solution for soybean plants which promotes the best growth, was found to be 3:10 (Hashimoto, 2012). Therefore, the quantity and ratio of K and Mg should be considered in fertilisation in rubber growing soils because K and Mg management is important in promoting growth and plant health.…”

Section: Effect Of K:mg Ratio On Growth and Nutrient Concentration In Leaves Of Rubber Tree Saplingsmentioning

confidence: 99%

Response of Rubber Tree Saplings to Dolomite and Kieserite Application and K:Mg Ratio

Poonpakdee¹,

Khawmee²,

Onthong³

2021

JST

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This study aimed to examine the effect of the application of dolomite and kieserite on the growth and nutrient uptake of rubber tree saplings and the relationship between K:Mg ratios in soils and nutrient uptake. The experiment followed a completely randomized design with five replicates. Budded stumps of RRIM 600 rubber were planted in soil with low extractable Mg (< 0.30 cmolc kg-1). Kieserite application at a rate of 0.5 cmolc Mg kg-1 significantly promoted the greatest sapling height, stem diameter, Mg and S concentrations, and leaf chlorophyll levels. High kieserite application rates (1.0 cmolc Mg kg-1) were more likely to decrease K and N uptake significantly. Applying dolomite (0.5 cmolc Mg kg-1) also significantly increased rubber growth compared with the control treatment but the significant increases were lower than those for kieserite application. Applying K at 72, 108, and 180 mg kg-1 significantly increased leaf K concentration, but significantly decreased Mg concentrations. Therefore, rubber plantations should apply Mg at a rate of 0.5 cmolc Mg kg-1 in the form of kieserite, and a ratio of K:Mg 2:1 is suitable for promoting rubber tree growth.

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Section: Effect Of K:mg Ratio On Growth and Nutrient Concentration In Leaves Of Rubber Tree Saplingsmentioning

confidence: 99%