1 Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam.
2 Non-Timber Forest Products Research Centre, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam.
* Corresponding author
Research Article
World Journal of Advanced Research and Reviews, 2019, 02(01), 007-012.
Article DOI: 10.30574/wjarr.2019.2.1.0028
Received on 15 April 2019; revised on 11 May 2019; accepted on 14 May 2019
Fertilizers (nitrogen/N, phosphorous/P, and potassium/K) have been widely applied to increase the productivity of forest plantation, especially in poor soils. This study was to test the effects of fertilization at planting and additional fertilization in the following two years on growth and aboveground biomass (AGB) of a 30-month old plantation of Acacia mangium in Northeast Vietnam. There were four treatments including (1) 1 kg compost/tree at planting and 0.2 kg NPK (16:16:8)/tree/year in the following two years (IC-A-NPK), (2) 1 kg compost/tree at planting and 0.2 kg P (16.5% P2O5) + 0.1 kg K (60% K2O)/tree/year in the following two years (IC-A-PK), (3) 1 kg compost + 0.2 kg NPK/tree at planting and 0.2 kg NPK/tree/year in the following two years (IM-A-NPK), and (4) 1 kg compost + 0.2 kg NPK/tree at planting and 0.6 kg P + 0.1 kg K/tree/year in the following two years (IM-A-PK). The results indicated there was no significant effect of fertilization at planting and additional fertilization on diameter at breast height (DBH), basal area, and AGB between IC-A-NPK (DBH of 8.9 cm, basal area of 7.4 m2 ha-1, and AGB of 37.8 Mg ha-1) and IM-A-NPK (DBH of 10.1 cm, basal area of 9.2 m2 ha-1, and AGB of 47.5 Mg ha-1). Meanwhile, DBH (9.6 cm), basal area (8.6 m2 ha-1) and AGB (44.2 Mg ha-1) in IM-A-PK were significantly higher than that in IC-A-PK (DBH of 8.4 cm, basal area of 6.4 m2 ha-1, and AGB of 31.6 Mg h-1). It was concluded that fertilization at planting of both compost and NPK is not required for A. mangium plantation. While additional fertilization of phosphorus should be applied for higher productivity.
Aboveground biomass; Fertilization; Nitrogen; Phosphorus; Productivity
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Vu Tien Lam, Nguyen Huy Son, Nguyen Toan Thang, Phung Dinh Trung, Pham Dinh Sam, Ho Trung Luong, Nguyen Huu Thinh, Dao Trung Duc and Tran Van Do. Importance of phosphorus application in Acacia mangium plantation. World Journal of Advanced Research and Reviews, 2019, 2(1), 0-0. Article DOI: https://doi.org/10.30574/wjarr.2019.2.1.0028