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›› 1980, Vol. 16 ›› Issue (2): 102-108.

• 论文及研究报告 • Previous Articles     Next Articles

THE NUTRIENT CONTENT OF THROUGHFALL IN TWO FORESTS GROWN ON KRASNOZEM IN XIANGGANG

Zou Gui-chang   

  1. Dept. of Forestry, Australian Nat. University
  • Received:1900-01-01 Revised:1900-01-01 Online:1980-05-25 Published:1980-05-25

Abstract: The nutrient accession in throughfall under the canopies of Tutcheria spcctabilis and Melaleuca leucadendron was studied for a period of 12 months. Upon passing the canopies, rainwater was enriched with nutrients through the leaching of leaf-impinged particles and leaf exudates. During the study period, the K, Na, Ca and Mg contents of the incident rainfall were 9.5, 19.1, 11.6 and 3.0 kg/ha, respectively. The contents of these elements in Tutcheria throughfall were 28.5, 23.0, 18.7 and 5.2 kg/ha; whereas the corresponding values for Melalcuca throughfall were 30.3, 36.0, 27.3 and 11.4 kg/ha, respectively. Owing to the differences in species, precipitation and leachability of elements, pronounced seasonal variations exist in throughfall nutrient accession. Nutrient return approximates precipitation closely in a semi-log curve, indicating a limited and gradual supply of nutrients from their respective sources between the intervals of rain.