頁籤選單縮合
題名 | 一、二期作水稻分蘖特性及光合成能力之探討 |
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作者 | 林安秋; | 書刊名 | 中華農學會報 |
卷期 | 100 1977.12[民66.12] |
頁次 | 頁87-97 |
關鍵詞 | 分蘖; 水稻; 光合成; 特性; 能力; |
語文 | 中文(Chinese) |
英文摘要 | The purpose of this study was to elucidate the causes of low yielding in the second crop of rice. Two varieties of rice was cultivated at the same place in different crop seasons with similar cultural practices. Results of both the field and phytotron-trials were summarized as follows: 1. The first tiller emerged 27-30 days (while the 2nd crop 10 days) after transplanting in the 1st crop. The number of tillers reached their maximum about 50-60 days in the 1st crop, but in the second crop, it was 10 days earlier than that of the 1st crop. The results of phytotron trials showed the same trend. 2. The first tiller emerged from the 5th node in Taiwan No. 5, irrespective to the number of seeding per hill or crop season. But the tiller of Taichung Native No. 1 emerged more from node No. 6, and node No. 5. Both of the two crop seasons have the same results. 3. The percentage of the effective number of tillers was higher in the 2nd crop than in the 1st crop on Tainan No. 5. In the case of Taichung Native No. 1, the results was same as Tainan No. 5 in one seedling per hill plot. But three seedlings per hill plot had contradictory results. 4. Most of the effective tillers formed from the primary, secondary and tertiary tillering in the 1st crop of one seeding per hill plot. But in the case of 2nd crop, the effective tillers were limited to the primary and secondary tillering. The results of three seedling per hill plot was lower than that of one seedling. 5. The last tiller of the main culm was on the position of 12th node in the 1st crop of one seedling per hill plot. In 2nd crop. it was a node lower, and even lower in the three seedlings per hill plot. 6. The total tillers on each node of the main culm was lesser in the 2nd crop than that of the 1st crop. Two varieties had the same results. 7. Under the controlled temperature condition in phytotron, more tillers formed at the lower day-night temperature plot (25℃-20℃), but lesser at higher temperature plot (30℃-25℃). 8. The photosynthetic capacity and photosynthetic efficiency were lower in the 2nd crop than the 1st. 9. The effective number of tiller was lesser in the temperature duration treatment modified 2nd crop. 10. The percentage of ripened grains was lower in the temperature duration treatment modified 2nd crop than the 1st. 11. The leaf area, chlorophyll content and the photosynthetic activities at heading stage were lower in the teperature duration treatment modified 2nd crop than the 1st. According to these results, high temperature affected tillering and deteriorated photosynthetic system before heading, the unfavourable solar radiation during autumn limited the photosynthesis after heading of 2nd rice crop, these are the causes that resulted in low yielding of the 2nd crop in Northern Part of Taiwan. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。