Potassium and magnesium in leaf and top soil affected by triple superphosphate fertilisation in an Acacia mangium plantation

Mori T., . and Kajino H., . and Hardjono A., . and Heriyanto J., . and Nakamura R., . and Konda R., . and Ishizuka S., . and Ohta S., . and Wicaksono A., . and Genroku T., . Potassium and magnesium in leaf and top soil affected by triple superphosphate fertilisation in an Acacia mangium plantation. pp. 1-8. ISSN 0128-1283

Since nutrients have either synergetic or antagonistic effects fertilisation has potential to change harvest export of other nutrients present in plantations. In the present research we investigated the effects of triple superphosphate (TSP) fertilisation on Mg and K contents of leaf and soil pools in a monoculture Acacia mangium plantation in South Sumatra Indonesia. TSP fertilisation reduced leaf K concentration but leaf K content per stand area did not show any difference between control and fertilised plots because of the offset by stimulated biomass increment following fertilisation. TSP fertilisation significantly elevated both leaf Mg concentration and leaf Mg content per stand area indicating the stimulated Mg uptakes by trees. Despite the stimulated uptakes soil Mg pools were not affected by the fertilisation. It was possibly because the decrease in soil Mg pools during the experimental period was much greater than the stimulated Mg uptakes deriving from the fertilisation. Although the soil nutrient pools were not affected by TSP fertilisation in the present study our results of the increased leaf Mg contents and the estimated future harvest export of Mg suggest that unbalanced fertilisation can accelerate nutrient export from plantation soils through harvesting.

Full text available from: Official URL: https://www.frim.gov.my/v1/jtfsonline/jtfs/v30n1/1...

Abstract

Since nutrients have either synergetic or antagonistic effects fertilisation has potential to change harvest export of other nutrients present in plantations. In the present research we investigated the effects of triple superphosphate (TSP) fertilisation on Mg and K contents of leaf and soil pools in a monoculture Acacia mangium plantation in South Sumatra Indonesia. TSP fertilisation reduced leaf K concentration but leaf K content per stand area did not show any difference between control and fertilised plots because of the offset by stimulated biomass increment following fertilisation. TSP fertilisation significantly elevated both leaf Mg concentration and leaf Mg content per stand area indicating the stimulated Mg uptakes by trees. Despite the stimulated uptakes soil Mg pools were not affected by the fertilisation. It was possibly because the decrease in soil Mg pools during the experimental period was much greater than the stimulated Mg uptakes deriving from the fertilisation. Although the soil nutrient pools were not affected by TSP fertilisation in the present study our results of the increased leaf Mg contents and the estimated future harvest export of Mg suggest that unbalanced fertilisation can accelerate nutrient export from plantation soils through harvesting.

[error in script]

Item Type:	Article
AGROVOC Term:	Acacia mangium
AGROVOC Term:	Plantations
AGROVOC Term:	Plantation crops
AGROVOC Term:	Grasslands
AGROVOC Term:	Imperata cylindrica
AGROVOC Term:	Leaf
AGROVOC Term:	Leaf area
AGROVOC Term:	Leaf analysis
AGROVOC Term:	Soil
AGROVOC Term:	Fertilization
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24785

Actions (login required)

View Item