Productivity and mineral cycling in an oak coppice forest 2. Annual net production of the forest
Productivity and mineral cycling in an oak coppice forest 2. Annual net production of the forest
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橡树林的生产力和矿物质循环 2. 森林的年净产量
DOI：
10.1007/bf02489474
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
K. Matsuda
中科院分区：
文献类型：
--
作者：
M. Kimura;M. Funakoshi;S. Sudo;T. Masuzawa;Toshie Nakamura;K. Matsuda
年净生产量估计在东京附近的次生矮林，这是占主导地位的落叶栎，栎serrataThunb。在10 m × 10 m的皆伐样方中，通过对35个新梢的年轮观察，直接估算了茎和老枝的侧向生长量。在样方中还称量了当前器官的植物量。利用12个0.5m2的凋落物收集器和12个6 m2的样方分别收集细凋落物和木质凋落物，测定了当前器官的收获前损失。分支生产也间接评估使用的干分支异速生长和死亡的分支。间接法测定结果与直接法测定结果基本一致。冠层树叶的放牧损失直接来自于树叶面积的损失，间接来自于枯枝落叶层捕获器捕获的动物粪便。冠层树木的净产量为149 kg/年，其中树叶产量为36.9 kg。到生长季节结束时，动物吃掉了大约14%的树叶面积。动物对叶的实际消耗量为叶产量的7.6%或叶质量的10%。林下植物（主要是矮竹）的年生产量为28 kg，占林分总生产量的15%，明显高于冷温带落叶阔叶林。
Annual net production was estimated in the secondary coppice forest near Tokyo, which was dominated by a deciduous oak,Quercus serrataThunb. Lateral growth of stems and old branches was directly estimated by examining the annual rings for 35 shoots in a clear-cut quadrat of 10m×10m. Phytomasses of current organs were also weighed in the quadrat. Preharvest losses of current organs were determined by twelve 0.5 m2litter traps for fine litter and twelve 6 m2quadrats for woody litter. Branch production was also assessed indirectly by use of the stem-branch allometry and death of branches. The results of the indirect method were in sufficient agreement with the result of the direct one. Grazing loss of leaves from the canopy was estimated directly from the loss in leaf area and indirectly from the animal faeces caught by the litter traps.Net production of the canopy trees was 149 kg a−1year−1, in which leaf production was 36.9 kg. Animals grazed about 14% of the leaf area by the end of the growing season. True consumption of leaves by animals was 7.6% of leaf production or 10% of leaf mass. Production of undergrowth, mainly a dwarf bamboo,Pleioblastus chinoMakino, was 28 kg a−1year−1, being 15% of the total stand production.Productivity of this forest was significantly higher than that of cool-temperate deciduous broadleaf forests.