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Li Z.W.,Central South University of forestry and Technology | Li Z.W.,National Engineering Laboratory | Li Z.W.,City of Hunan Province Key Laboratory of Forest Ecology | Li Z.W.,Hunan Province National Field Observation and Research Station | And 20 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica

This study selected typical needle and broadleaved subtropical forests (camphor and pinus massoniana mixed forests) as the research object; from 2009 to 2011 the litter fall was investigated monthly. The results showed that the annual litterfall production was (4634.723±337.1427) kg/hm2,and foliage accounted for 71.78% >branches (26.24%) > litter debris(8.46%) >fruits(3.23%). The total amount of litterfall had the obvious monthly dynamic. In November, its maximum was 1025. 6 kg/hm2; the minimum appears in February which was 138. 606 kg/hm2. There were significant differences of macroelemens and microelements in mixed forest. The order of the macroelemens was C>N>Ca>K>S>Mg>P, as the microelement was Mn>Fe>Zn>Pb>Cd >Cu >Ni >Co. The features of C/N was: the branch (66.96%) > fruit (63. 48%) > leaf (40. 62%). The content of litter nutrient directly determines the amount of nutrients return in forest. The amount of litter nutrients return was 80.936 kg/hm2 in Camphor and pinus massoniana mixed forest. The features of litter nutrients return of each element size sequence was: N > Ca > K > S > Mg > P > Mn > Fe > Zn > Pb > Cd > Cu > Ni > Co. Thecharacteristics of various components of the nutrients return was: leaf (67.469 kg/ hm2)> branch (14.928kg/ hm2) > fruit (2.361 kg/ hm2). The amount of N return in mixed forest was 40.964 kg/ hm2.Among this, the return amount of N in leaf had a value of 34. 877 kg/ hm2. Source

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