亚热带地区树叶凋落物在流水和静水环境中的淋溶规律

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Abstract

To investigate the leaching process in the prophase of leaf litter decomposition in water in subtropical region of China, we studied the leaching mass losses of leaf litter of 8 common species in Guangzhou in lentic or running water. The results showed that the rate of dry mass loss of leaf litter of all species whether in lentic water or in running water were significantly higher in the first day than in other days (P<0.05), but the difference of leaf species might lead to different leaching mass losses. The leaching rate of Dracontomelon duperreanum whose leaves are soft and thin-coriaceous was significantly higher than those of other species (27.0% lost in running water, 24.2% in lentic water), and the leaching rate of Podocarpus nagi whose leaves are rigid and coriaceous was the lowest (9.8% in running water, 8.0% in lentic water). There was no significant difference in the rate of dry mass loss in the 2^nd day and 3^rd day, which suggested the leaching might finish. Summarily, the leaching phase of leaf litter in subtropical zone lasted out for one day whether in lentic water or in running water.

Key words： Leaf litter leaching leaf species lentic water running water

Received: 25 February 2010

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	CHI Guo-liang
	TONG Xiao-li

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CHI Guo-liang,TONG Xiao-li. Leaching process of leaf litter in running water and lentic water in subtropical China[J]. , 2010, 29(1): 50-55.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2010/V29/I1/50

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