CHANGE OF NUTRIENT IMPORT AND EXPORT IN PROCESS OF RAINFALL IN AILAO MOUNTAIN OF YUNNAN PROVINCE
- Received Date: 1995-12-01
- Publish Date: 1996-06-20
- broad-leaved evergreen forest /
- rainfall /
- nutrient import and export /
- Ailao Mountain.
Abstract: In this paper, the effects of rainfall on nutrient import and export in the broad-leaved evergreen forest in southwest Yunnan Province have been observed.The results show that in the process of rainfall the nutrient import in rainfall is mainly N and the major elements of nutrient import in throughrain are P, K and Mg.They occupy 69.85%, 77.33%, 98.19%, and 80.40% of the total nutrient import respectively.Ca occupies about half of the total nutrient import in rainfall and throughrain and the percentages are 45.35% and 54.38% respectively.The major form of nutrient export is soil percolation.N, P, K, Ca and Mg occupy 96.52%, 86.79%, 69.13%, 98.17% and 97.21% of the total nutrient export respectively.In nutrient cycle, N, P, K and Ca increase 25.94 kg/(ha.a), 0.353 kg/(ha.a), 3.83 kg/(ha.a), 1.26 kg/(ha.a)respectively, but Mg reduces 0.654 kg/(ha.a).
|Citation:||Gan Jianmin, Xue Jingyi, Zhao Hengkang. CHANGE OF NUTRIENT IMPORT AND EXPORT IN PROCESS OF RAINFALL IN AILAO MOUNTAIN OF YUNNAN PROVINCE[J]. Chinese Geographical Science, 1996, 6(2): 155-165.|