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福建省长汀县河田镇是我国南方红壤区典型的严重水土流失区之一 ,自 2 0世纪 80年代以来采取了许多有效的治理措施。本文对封禁管理和对照 (未治理 )群落的生物量、生产力、养分循环和能量进行了研究 ,结果表明 :封禁管理后群落的生产力得到极大的提高 ,生物量是对照的 75 .7倍 ,N、P、K、Ca、Mg的积累量分别是对照的 49.4、5 9.2、5 5 .0、48.4和 70 .0倍 ,能量现存量是对照的 78.3倍 ;封禁管理后乔木层成为营养元素和能量积累的主体 ,灌木层、草本层和苔藓层的养分与能量的积累量占群落总积累量比重不大 ,但对该类型退化生态系统的恢复具有重要意义 ;封禁管理后群落的养分循环已较为畅通 ,太阳能转化率达到 0 .81% ,而对照的仅为 0 .0 2 3% ;因此封禁管理后群落的养分循环功能和能量生产能力已得到一定程度的恢复 ,这种生态重建模式值得类似地区推广与应用。
Hetian Town, Changting County, Fujian Province, is one of the typical areas of serious soil erosion in the red soil region of southern China. Many effective measures have been taken since the 1980s. In this paper, the biomass, productivity, nutrient cycling and energy of the closure management and control (non-control) community were studied. The results showed that the productivity of the community after the closure management was greatly improved, the biomass was 75.7 times that of the control, The accumulation of N, P, K, Ca and Mg were 49.4, 5 9.2, 5.5, 48.4 and 70.0 times that of the control respectively, and the energy stock was 78.3 times that of the control; the tree layer became the nutrient element after the closure management And the main body of energy accumulation, the accumulation of nutrient and energy in the shrub layer, herb layer and moss layer accounted for a small proportion of the total amount of community accumulation, but was of great significance to the restoration of this type of degraded ecosystem. The nutrient cycle Has been relatively smooth, the solar energy conversion rate reached 0.81%, while the control was only 0. 023%; so after the closure of the management of nutrient cycling and energy production capacity of the community has been a certain degree of recovery, this ecological reconstruction mode Worth similar to the promotion and application areas.