Chin J Plan Ecolo ›› 1982, Vol. 6 ›› Issue (4): 257-267.

• Research Articles •     Next Articles

Biological Productivity of Two Forest Communities in Huitong County of Hunan Province

Feng Zongwei, Chen Chuying, Zhang Jiawu, Wang Kaiping, Zhao Jilu   

  • Online:1982-04-10 Published:1982-04-10
  • Contact: Qiu Xuezhong

Abstract: Standing crop of representative 20 year-old stands of natural Pinus massoniana and artificial Cunninghamia lanceolata determined by destructive analysis.Standing crop in Pinus massoniana community and Cunninghamia lanceolata community were respectivity 106.80 ton/ha and 156.31 ton/ha. The standing crop and net production of trees layer were respectively 100.62 ton/ha and 5.03 ton/ha/yr for Pinus massoniana community, 150.85 ton/ha and 7.54 ton/ha/yr for Cunninghamia lanceolata community. The amount of nutrient elements in 1 ton standing crop of trees layer were respectively 13.22 kg for Pinus massoniana community and 14.56 kg for Cunninghamia lanceolata community, it is worth notice that the amount of nutrient elements in 1 ton standing crop of subordinate vegetation is 3.6--4.5 times than trees layer. Standing crop and amount of nutrient element of litterfall were respectively 2.3 ton/ha, 58.37 kg/ha for Pinus massoniana community; and 1.4 ton/ha, 47.82 kg/ha for Cunninghamia lanceolata community. Returning litterfall to soil could lead to increasing of the organic matter in soil and increasing the cycle speed of nutrient elements in Pinus massoniana community were better than in Cunninghamia lanceolata community.Chlorophyll content and extinction coefficient of community were presented and compared. The results show that artificial Cunninghamia lanceolata community can use light energy more efficiently than the natural Pinus massoniana community.

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