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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
Citation: 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

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

More Information
  • Received Date: November 12, 2015
  • Available Online: May 17, 2023
  • 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.

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