马尾松和杉木人工林凋落物能量研究

通过对福建建瓯25年生马尾松和杉木人工林凋落物能量归还量及月动态的研究,结果表明:马尾松和杉木人工林凋落物年能量总归还量分别为13 734 KJ.m-2和11 377 KJ.m-2,其中通过落叶归还的能量分别占总凋落物能量归还量的67%和60%,表明凋落叶是凋落物能量归还的主体。马尾松林总凋落物能量归还量月变化动态呈单峰型,在7月出现峰值;而杉木林总凋落物能量归还量1 a中出现3次峰值(5月、8月和11月)。

Study of Pinus massoniana and Cunninghamia lanceolata Plantation Litter Energy

Through the study of 25-year-old Pinus massoniana and Cunninghamia lanceolata plantation litter energy returning amount and monthly dynamic,the results showed that P.massoniana and C.lanceolata plantation litter annual energy total returning amounts were 13734KJ·hm-2 and 11377 KJ·hm~(-2),the defoliation returning energies accounted 67% and 60% of total litter energy returning amount,respectively,which showed that the defoliation was the main body of litter energy returning.P.massoniana forest total litter energy returning amount monthly change dynamic assumed single peak style,the peak value assumed in Jul.;whereas C.lanceolata plantation total litter energy returning amount assumed the peak value for 3 times(in May,Aug.,and Nov.).