JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2011, Vol. 35 ›› Issue (04): 63-66.doi: 10.3969/j.jssn.1000-2006.2011.04.013

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Characteristics of rainfall redistribution under the canopy of different types Phyllostachys edulis forests in Northern Fujian province

LIU Weiyi1, FAN Shaohui1*, LIU Guanglu1, GUO Baohua1, YU Lin1, CHEN Xiaochou2   

  1. 1.International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, Beijing 100102,China;2.Yangkou National Forest Farm of Fujian Province, Shunchang 353211, China
  • Online:2011-08-13 Published:2011-08-13

Abstract: The characteristics of rainfall redistribution under the canopy of three typical Phyllostachys edulis forests (Ph. edulis and Cunninghamia lanceolata mixed forest(Ⅱ), Ph. edulis pure forest(Ⅲ) and Ph. edulis and broadleaved tree mixed stands(Ⅳ)) in the Northern of Fujian province were studied in comparison with C. lanceolata forest (Ⅰ) and evergreen broadleaved forest(Ⅴ). The results showed that: Throughfall rates ranged from 46.23 % to 86.22 %, the order of average throughfall rates was:Ⅰ(77.0 %)>Ⅲ(75.0 %)>Ⅳ(73.7 %)>Ⅱ(70.3 %)>Ⅴ(67.7 %).It was found that, as rainfall depth and intensity increased, the stemflow of three Ph edulis forests increased with a higher proportion than C. lanceolata forest and evergreen broadleaved forest. The order of stemflow rates was Ⅳ(69.2 mm)>Ⅲ(52.0 mm>Ⅱ(37.3 mm)>Ⅴ(23.0 mm)>Ⅰ(17.6 mm), and the order of least rainfall produced by stemflow in the five forest stands was:Ⅱ(6.4 mm)<Ⅳ(6.9 mm)<Ⅲ(7.5 mm)<Ⅴ(8.9 mm)<Ⅰ(10.4 mm). Throughfall, stemflow and canopy interception were linearly correlated to rainfall outside the stands at the extremely significant level(p<0.01),that the equation Y=a+bX could be used to show the relationship between the rainfall and througfall, and three curve equation (Y=β0+β1X+β2X2+β3X3) was applied to explain the relationship between rainfall and canopy interception.The canopy interception rates ranged form 14.1 % to 53.5 %, that the order was:Ⅴ(31.3 %)>Ⅱ(28.2 %)>Ⅳ(23.5 %)>Ⅲ(22.9 %)>Ⅰ(22.3 %). In summary, Ph. edulis and Cunninghamia lanceolata mixed forest had the highest interception capability among three different types Ph. edulis forest on heavyhard rain condition while the pure Ph. edulis forest performed best with interception capability on light and moderate rain condition.

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