執行成果摘要
It is very important to understand the knowledge of chemical, physical, and biological properties of soils to assess capacity of sites to support sustainable productive forests. Those soil properties can be described as soil health index. The concept of soil health index includes assessment of soil properties and processes as they related to ability of soil to function effectively as a component of a healthy ecosystem. Soil health index, sensitive to variations in management, are needed to compare the effects of management practice on soil through time. However, very litter information is available that relates soil health index to total net primary production of managed plantations in Taiwan. The goals of the project are to analyze the impact of soil physical and chemical qualities on sustainable plantation management and to build soil health index in order to provide important indicators and references for sustainable management of health plantation ecosystems. To achieve to goal the plantations of selected important tree species such as cryptomeria (Cryptomeria japonica) and hinoki will be investigated. Their soil chemical,and physical properties and tree growth will be analyzed inorder to build the relationships between productivity and possible soil properties and between stand age and the soil properties as well. Then the soil health index will be suggested for the health plantationecosystems of the tree species. The soil health index of hinoki plantations in northeastern and central Taiwan have been investigated in the first year. In the central region of the hinoki plantations, soil total carbon, total nitrogen, phosphorus increase the effectiveness of the trend with age presents, and stands at an average plant growth and also showed a high degree of linear correlation, can this three properties for soil the health indicators.
It is very important to understand the knowledge of chemical, physical, and biological properties of soils to assess capacity of sites to support sustainable productive forests. Those soil properties can be described as soil health index. The concept of soil health index includes assessment of soil properties and processes as they related to ability of soil to function effectively as a component of a healthy ecosystem. Soil health index, sensitive to variations in management, are needed to compare the effects of management practice on soil through time. However, very litter information is available that relates soil health index to total net primary production of managed plantations in Taiwan. The goals of the project are to analyze the impact of soil physical and chemical qualities on sustainable plantation management and to build soil health index in order to provide important indicators and references for sustainable management of health plantation ecosystems. To achieve to goal the plantations of selected important tree species such as cryptomeria (Cryptomeria japonica) and hinoki will be investigated. Their soil chemical,and physical properties and tree growth will be analyzed in order to build the relationships between productivity and possible soil properties and between stand age and the soil properties as well. Then the soil health index will be suggested for the health plantation ecosystems of the tree species. The soil health index of cryptomeria plantations in northern Taiwan have been investigated in the first year. The hinoki plantations in northeastern and central Taiwan will be selected to study this year.