JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2018, Vol. 42 ›› Issue (04): 193-197.doi: 10.3969/j.issn.1000-2006.201705003

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Study on leaf nutrient of Camellia oleifera in Jiangxi Province

HU Guozhu1,2, GAO Wei1*, XU Yixin3, GONG Chun1Symbol`@@, NING Boxuan2, XU Linchu1, YANG Funing4   

  1. 1.Jiangxi Academy of Forestry, Nanchang 330013, China; 2.Jiangxi Forestry Research and Planning Research Institute, Nanchang 330046, China; 3.Nanchang Meteorological Bureau, Nanchang 330046, China; 4.Bureau of Nanchang Forest, Nanchang 330038, China
  • Online:2018-07-27 Published:2018-07-27

Abstract: Abstract: 【Objective】 In this study, we measured the microelements of Camellia forest in Jiangxi mountains during the growth period of spring shoots. The concentration of micronutrients in the fertilizer was summarized; the special fertilizer for Camellia oleifera was accordingly produced. 【Method】We used the DRIS index method to analyze nine nutrient elements(N, P, K, Ca, Mg, Cu, Zn, Fe and Mn)in leaves of C. oleifera in 20 counties of the Jiangxi Province.【Result】 The results showed that N, P, Mg and Fe levels were low, while K, Ca, Cu, Zn and Mn levels were adequate. The order of nutrients required for production of tree fertilizer was Fe > P > N > Mg > Mn > Ca > Zn > K > Cu. According to the nutrient concentration in the leaves of the high yield group, the corresponding nutrient diagnostic criteria were established: N, 12.728-17.793 g/kg; P, 0.715-1.045 g/kg; K, 6.950-9.728 g/kg; Ca, 4.876-8.909 g/kg; Mg, 1.270-2.414 g/kg; Cu, 1.219-3.918 mg/kg; Zn, 11.485-16.393 mg/kg; Fe, 0.096-0.221 g/kg; and Mn, 0.707-2.840 g/kg. 【Conclusion】When the element concentration is not in its corresponding range, it is either in excess or absent in the tree. During spring, nitrogen and phosphorus should be applied to C. oleifera. Iron supplementation should also be considered.

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