Comparison on litterfall character of Phoebe bournei and Cunninghamia lanceolata plantation in the field of successive planting Cunninghamia lanceolata

The characteristic of litter was studied in the forest of Phoebe bournei in the filed after successive planting Cunninghamia lanceolata.The results showed that the annual litterfall of P.bournei forest was 2 262.02 kg·hm~(-2) which was more than that of the successive planting forest of C.lanceolata (CK).The changing law of annual litter of the two kinds of forests were similar,namely,leaf was the largest,next branch,flower mixed with fruit,mixed leaf,then crumb,and the last was mixed branch.The return pattern of P.bournei forest was that maximum litterfall appeared in April,accounting for 45.37% of the whole yearly litterfall,leaf being the main litter and taking the most percentage(93.43%) of lunar litterfall;That of successive planting forest of C.lanceolata presented in August,accounting for 48.49% of the whole yearly litter,leaf also being the main litter but only taking about the half(48.35%) of lunar litterfall.The largest lunar litterfall quantity of the forest of C.lanceolata was 900.62 kg·hm~(-2) which was less than that of the P.bournei forest.The return patterns of seasonal litterfall in the two forests were different,seasonal litterfall of P.bournei forest showing spring(50.40%)autumn(24.19%)summer(23.04%)winter(2.37%),however,that of the successive planting forest of C.lanceolata showing autumn(53.06%) spring(24.07%)summer(15.76%)winter(6.48%).