华南农业大学学报2016，Vol.37Issue(4)：18-24,7.DOI:10.7671/j.issn.1001-411X.2016.04.004
粤西8年生加勒比松施肥效果研究
Effects of fertilization on growth of eight-year-old Caribbean pine in West Guangdong
摘要
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 fo-liar 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 P2 O5 (30 g·plant-1). The individual stem volume of plants fertilized with 50 g urea+250 g calcium magne-sium phosphate fertilizer+25 g KCl for 15 months was increased by 23. 6% on average compared to the blank control. The treatments with P ( N2 P1 K2 , N2 P2 K2 ) 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.关键词
加勒比松/肥效反应/生长性状/协方差分析Key words
Pinus caribaea var. caribaea/fertilizer response/growth performance/covariance analysis分类
农业科技引用本文复制引用
郭文冰,赵奋成,戎洁庆,王保华,覃玉英,李义良,吴惠姗..粤西8年生加勒比松施肥效果研究[J].华南农业大学学报,2016,37(4):18-24,7.基金项目
国家林业公益性行业科研专项(20110414) （20110414）
