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題名 | 砂床培育帶菌根杉木苗之研究﹣﹣砂床苗圃接種菌根試驗 |
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編 次 | 2 |
作 者 | 鍾旭和; 顏江河; 簡光文; | 書刊名 | 林業試驗所研究報告季刊 |
卷期 | 7:1 1992.03[民81.03] |
頁次 | 頁27-37 |
分類號 | 436.253 |
關鍵詞 | 杉木苗; 砂床; 苗圃; 培育; 帶菌根; 接種; 菌根; |
語文 | 中文(Chinese) |
中文摘要 | 在土床及砂床苗圃,選擇能大量繁殖且具短休眠期的Glomus mosseae 進行杉木苗的接種試驗,結果顯示: 1.接種與否並不影響砂床育苗成活率(平均為97%);而接種則可明顯提高土床苗 成活率(接種者高達86%;未接種者74%)。 2.不論是砂床或土床,接種處理均能促進苗高生長,增加地上部及根部乾重,並 提高根、莖及葉部之磷含量。 3.砂床苗與土床苗相較其地上部生長差異不大,但就根系之發育而言,則前者優 於後者。接種土床苗之莖/根比值最高;未接種之砂床苗最低,接種砂床苗與未 接種土床苗莖/根值近似,而介於上述二者之間。 4.施用含磷量適中之肥料能促進苗木之生長發育,其中以每次施用10∼30 g/㎡過 磷酸鈣之中度施肥最具效應。 5.杉木自砂床出栽後,以玉米間作確能有效地提高砂床孢子含量,惟此高密度之 孢子是否能如預期中感染下一期,而不需再行接種作業,則有待進一步觀察評 估。 |
英文摘要 | In our previous study we found that the short dormant Glomus mosseae which produce mass spore by snad culture was the most effective mycorrhizal fungus associated with China-fir. Spore of Glomus mosseae, hence, was selected as inoculum for sand nursery inoculation experiment in the present study. The performances and nutrient status of mycorrhizal seedlings thus obtained were compared with that of non-mycorrhizal seedlings cultivated in sand bed as well as mycorrhizal and non- mycorrhizal seedlings cultivated in regular forest soil bed. The results can be summarized as follow: 1.The survival rates of seedlings cultivated in sand beds (SA) were significantly (p<0.05) higher than those cultivated in soil beds (SO); the former were 98%, and 97%, respectively, for mycorrhizal (MSA) and non-mycorrhizal (NMSA) seedlings; while the latter were 86% and 78%, respectively, for MSO and NMSO. 2.No singnificant difference in growth was found between MSA and MSO. Likewise we found no disparity in growth between NMSO and NMSA. The growth of mycorrhizal seedlings both in sand and soil beds, however, were significantly higher than the non-mycorrhizal ones. 3.Top-root ratio (TR ratio) of mycorrhizal seedlings cultivated in SO was quite different from that of cultivated in SA. The TR ratio of MSO and NMSA was, respectively, the highest and the lowest with that of MSA and NMSO in between. The extensive root system and vigorous shoot growth found in MSA suggest that MSA would be an ideal choice for reforestation in China-fir extensively planted areas of central Taiwan which are characterized by distint dry-wet seasons. 4.Phosphate fertilization was found to be necessary for improving the growth of China-fir seedlings. Moderate application of calcium superphosphate at 10∼30 g/㎡ would result in the best growth performance of MSA. 5.Results of corn intercropping experiment showed that such practice could increase and sustain the sufficient propagules in sand bed. |
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