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題 名 | 不同種植期對水芋乾物質與氮素累積性狀之影響=Effect of Planting Seasons on Accumulation of Dry Matter and Nitrogen in Wetland Taro [Colocasia esculenta (L.) Schott] |
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作 者 | 陳烈夫; 呂椿棠; 魏夢麗; 呂秀英; | 書刊名 | 中華農業研究 |
卷 期 | 48:3 1999.09[民88.09] |
頁 次 | 頁32-46 |
分類號 | 434.337 |
關鍵詞 | 芋; 種植期; 乾物質累積; 氮素累積; 地上部生長旺盛期; Taro; Planting seasons; Dry matter accumulation; Nitrogen accumulation; Vigorous top-growth stage; |
語 文 | 中文(Chinese) |
中文摘要 | 為瞭解水田檳榔心芋的田間產量表現,本試驗於1995及1996年分別於1、5及9月種植水芋,調查植株各部位在生育全期的乾物質與氮素累積量及累積速率的變化差異,以採討不同種植期對乾物質與氮素累積性狀之影響,並推知水芋葉片葉柄累積光合產物之最主要時期。由於不同種植期間環境氣候的變化不同,明顯造成水芋植株乾物質生產及氮素的重要時期,由於1月種植期在此期間的溫度及日射量較高,故地上部葉片及葉柄的乾物質與氮素累積速率最快,能累積最高的乾物質與氮素量,以因應之後球莖膨大充實所需,致使成熟期可獲致最高的球莖產量。9月種植期則因為地上部生長旺盛期間逢低溫及低日射量,乾物質與氮素累積速率甚為緩慢,氮素供源嚴重不足,而且在進入球莖快速膨大期以後地上部乾物重及氮素含量仍持續上升,表示在球莖快速膨大期葉片及葉柄仍然也還是氮素積儲器官,故導致成熟期之產量降低。5月種植期乾物質與氮素累積的生長特性,與1月種植期的表現頗為相似,惟地上部生長旺盛期之累積速率較低,故成熟期之球莖產量較1月種植期為低。但是,種植期不會影響水芋地上部生長旺盛期地上部氮素與乾物質的相對累積效率。水芋地上部營養器官分配至葉片及葉柄的乾物質分配比例與氮素累積分配比例,亦不因種植期及生長階段而異,水芋植株地上部營養器官的乾物質量約有二分之一分配於葉片,三分之二分配於葉柄,而氮素累積分配比例大致上都是以約十分之六分配於葉片,而十分之四分配於葉柄,此顯示氮素含量有優先集中於葉片的趨勢,與乾物質的表現不相同。 |
英文摘要 | The purpose of this study was to investigate the effect of planting seasons on the pattern of dry matter and N accumulation for wetland taro. Field experiments were conducted in the January, May and September crops of 1995-1996. The amount and rate of dry matter and N accumulated were measured in different plant fractions during the whole growth periods. The accumulation of dry matter and N were strongly modified by planting seasons and plant age. Dry matter and N accumulated in the top (leaf and petiole) at the vigorous top-growth stage during the 3-5 months after planting was the determinant of biomass production of wetland taro. As a result of higher temperature and solar radiation at the vigorous top-growth stage, dry matter and N were substantially accumulated more rapid in the January crop. This resulted in greater source efficiency and rapid corm bulking, in favor of the yield at the maturity stage. When planting taro in September, low temperature and low solar radiation at the vigorous top-growth stage decreased the tare and amount of dry matter and N accumulation, moreover, dry matter and N accumulated in the top still increased at the corm rapid-bulking stage. This resulted in poor yield at the maturity stage. The May and January crop had similar pattern in the accumulation of dry matter and N, but the accumulation rate in May crop was slower than that in January crop. The relative ratio of accumulation rates between N and dry matter in the top at the vigorous top-growth stage remained the same among the different planting seasons. Planting seasons and plant age showed no significant effect on the partition ratio of dry matter and N accumulated by different above-ground organs. The results showed that about 1/3 of the plant dry matter in the top was distributed to leaves, and 2/3 to the petioles. For the total N content in the top, about 6/10 was accumulated in the leaf, and 4/10 in the petiole. |
本系統中英文摘要資訊取自各篇刊載內容。