碩士 / 國立中興大學 / 森林學系所 / 101 / In Dan-da working circle of central Taiwan, vegetable were planted illegally in medium altitude forest land for many years which was reclaimed and reforested by Nantou forest district office but the seedlings growth was retarded. We think that the long-term lime and manure application might change the soil properties and probably affect the seedlings growth. The aim of this study was to understand the soil properties in reclaimed area from medium altitude vegetable field and how arbuscular mycorrhizal fungi affected the growth of Chamaecyparis formosensis seedlings and soil nutrients. To find out what affected the seedlings growth, experiments were divided into two parts: field and greenhouse. Field experiment was to investigate soil chemical poperties and enzyme activity of reclaimed area from vegetable field in Dan-da working circle. We also investigated the mycorrhiza state of reforestation seedlings and isolated the mycorrhizal fungi from locals. Then we observed the growth of the mycorrhizal seedlings, C. formosensis, which were inoculated with these local mycorrhizal fungi and were planted in the reclaimed area from vegetable field at Dan-da working circle. In greenhouse experiment, to observe the growth and nutrient status of seedlings, C. formosensis seedlings were inoculated with arbuscular fungi and with different acid rain treatments. We also assayed the soil chemical properties and leachate to figure out the effect of mycorrhizal fungi on seedlings and soil at reclaimed area from vegetable field. The results showed that excess lime and manure were applied to the vegetable field for many years, which had led calcium residues in the soil and the alkalinization of the soil broke the balance of soil nutrients and its availability, especially phosphate. In addition, a lack of alkaline phosphatase, which may obstruct the phosphorus mineralization, led to the shortage of available phosphorus. However, the height, biomass and nutrient of seedlings that inoculated with arbuscular mycorrhizal fungi got significant higher than those of the uninoculated ones. Simultaneously, the inoculated seedlings reduced the loss of soil nutrient via leaching. In this study, the changes of soil chemical properties and enzyme activity in the reclaimed area from vegetable field at Dan-da working circle created growth stress in seedlings. And arbuscular mycorrhizae could not only enhanced the adaptation of C. formosensis but also increased the interception of soil nutrients, which made seedlings to overcome the adversity.
| Identifer | oai:union.ndltd.org:TW/101NCHU5360015 |
| Date | January 2013 |
| Creators | Yi-Chun Kuo, 郭珆㚬 |
| Contributors | Chiang-Her Yen, 顏江河 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 49 |
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