Effects of fertilization on growth of eight-year-old Caribbean pine in West Guangdong

GUO Wenbing; ZHAO Fencheng; RONG Jieqing; WANG Baohua; QIN Yuying; LI Yiliang; WU Huishan

doi:10.7671/j.issn.1001-411X.2016.04.004

Journal of South China Agricultural University > 2016 > 37(4): 18-24. > DOI: 10.7671/j.issn.1001-411X.2016.04.004

GUO Wenbing, ZHAO Fencheng, RONG Jieqing, WANG Baohua, QIN Yuying, LI Yiliang, WU Huishan. Effects of fertilization on growth of eight-year-old Caribbean pine in West Guangdong[J]. Journal of South China Agricultural University, 2016, 37(4): 18-24. DOI: 10.7671/j.issn.1001-411X.2016.04.004

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Effects of fertilization on growth of eight-year-old Caribbean pine in West Guangdong

1.
Guangdong Provincial Key Laboratory of Bio-control for the Forest Disease and Pest/Guangdong Academy of Forestry, Guangzhou 510520, China
2.
Yangjiang State-owned Forest Farm, Yangjiang 529500, China

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Received Date: November 12, 2015
Available Online: May 17, 2023

Graphical Abstract

Abstract

Abstract

Objective
In order to study the fertilizer response in an eight-year-old Pinus caribaea var.caribaea plantation in Yangjiang to the application of different proportions of nitrogen(N), phosphorus(P) and potassium(K) fertilizers mixed with microelements.
Method
There were 17 top application treatments of different proportions of N, P and K fertilizers mixed with microelements.The growth and foliar nutrient concentrations of P.caribaea var.caribaea were determined after 15 months.
Result
The covariance analysis showed that the optimum proportion of fertilizers was N (21.5 g·plant^-1) and P₂O₅ (30 g·plant^-1).The individual stem volume of plants fertilized with 50 g urea+250 g calcium magnesium phosphate fertilizer+25 g KCl for 15 months was increased by 23.6% on average compared to the blank control.The treatments with P (N₂P₁K₂, N₂P₂K₂) had significantly more growth compared to the P deficiency treatment (N₂P₀K₂).In addition, boron(B) application significantly increased the stem volume under the same N, P and K treatment.
Conclusion
P and B are both important for P.caribaea var.caribaea growth after canopy closure.The proportion of N and P plays an essential role in regulating the fertilizer response of P.caribaea var.caribaea.
- Pinus caribaea var.caribaea,
- fertilizer response,
- growth performance,
- covariance analysis

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