Research on Annual Changes of Nitrogen, Phosphorous, Potassium Absorption and Accumulation in Oil-tea Camellia Tree
Abstract; Five-year-old oil-tea camellia trees were selected to study the annual changes of nitrogen, phosphorous, potassium absorption and accumulation. The results showed that the annual accumulation of nitrogen, phosphorous and potassium achieved 44.05, 5. 50 and 23.31 g per tree, respectively. And the ratio was approximately 8:1:4. The active absorption and accumulation period of nitrogen and potassium was from shooting in April to fruit development in July during which over 50. 00% nitrogen and potassium of annual uptake was accumulated, in which 43.64% nitrogen and 26. 97% potassium were used by the roots. The accumulation of phosphorous was stable from April to October and achieved 2. 63 g per tree in which 35.36% was used by the roots during fruit ripening period. The content of major mineral elements in leaves, stems and roots of oil-tea camellia was N > K > P and K > N > P in ripening fruits. The phosphorous and potassium in roots partly transferred to leaves and new shoot during shooting period in April and the potassium in stems and leaves transferred to fruits during fruit ripening period.
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万方数据
维普
