Response of rubber tree saplings to dolomite and kieserite application and K:Mg ratio

Poonpakdee Chakkrit, . and Khawmee Khwunta, . and Onthong Jumpen, . Response of rubber tree saplings to dolomite and kieserite application and K:Mg ratio. pp. 2465-2479. ISSN 2231-8526

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�). Kieserite application at a rate of 0.5 cmolc Mg kg� 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�) were more likely to decrease K and N uptake significantly. Applying dolomite (0.5 cmolc Mg kg�) 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� 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� in the form of kieserite and a ratio of K:Mg 2:1 is suitable for promoting rubber tree growth.

Full text available from: Official URL: http://www.pertanika.upm.edu.my/pjst/browse/regula...

Abstract

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�). Kieserite application at a rate of 0.5 cmolc Mg kg� 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�) were more likely to decrease K and N uptake significantly. Applying dolomite (0.5 cmolc Mg kg�) 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� 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� in the form of kieserite and a ratio of K:Mg 2:1 is suitable for promoting rubber tree growth.

[error in script]

Item Type:	Article
AGROVOC Term:	Para rubber (tree)
AGROVOC Term:	Plant nutrition
AGROVOC Term:	Soil improvement
AGROVOC Term:	Soil sampling
AGROVOC Term:	Dolomite
AGROVOC Term:	Potassium
AGROVOC Term:	Magnesium
AGROVOC Term:	Mixed fertilizers
AGROVOC Term:	Soil chemicophysical properties
AGROVOC Term:	Growth
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10132

Actions (login required)

View Item