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頁籤選單縮合
題 名 | 水稻收穫指數與產量之關係 |
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作 者 | 林富雄; 吳育郎; | 書刊名 | 中華農學會報 |
卷 期 | 115 1981.09[民70.09] |
頁 次 | 頁33-41 |
關鍵詞 | 水稻; 收穫; 指數; 產量; |
語 文 | 中文(Chinese) |
中文摘要 | 利用本省育成之秈?稻及由國外引進之較早熟水稻品種30及29品種分別種植於第1及第2期作,以探討水稻收穫指數與谷產量、乾物量及主要農藝性狀間之表現型及因子型相關,並以兩者做路徑分析。試驗期間調查之性狀包括收穫指數、谷產量、乾物量、株高、抽穗日數、一株穗數、一穗粒數、結實率及千粒重。 試驗結果之變方分析顯示除第2期作收獲指數之品種間差異未達顯著外,其餘性狀均達1%差異標準。第1期作之收穫指數、谷產量及乾物量之平均值均大於第2期作。 表現型及因子型相關係數顯示第1及第2期作均以抽穗日數、一穗粒數及乾物量對谷產量有極顯著之正相關。第2期作之株高亦與谷產量有極顯著之正相關。另外,第2期作收穫指數與谷產量為顯著正相關。表現型及因子型之相關係數大部分均頗一致,只是多數因子型相關係數較大於表現型之相關係數。 路徑分析結果第1、2期作之谷產量對收穫指數均有正的直接影響;乾物量對收穫指數則有負的直接影響。對谷產量之影響,第1期作以一株穗數及一穗粒數最大,第2期作則以一穗粒數及結實率最大,而第2期作之千粒重對谷產量有負的直接影響。對乾物量之直接影響第1期作以千粒重、株高及一穗粒數較大,抽穗日數及結實率則有負的直接影響;第2期作則以一穗粒數及結實率正的直接影響大,而千粒重則有負的直接影響。 |
英文摘要 | Correlation and path coefficients were computed to evaluated the characters associated with grain yield and plant dry matter. The ways improving harvest index in rice at two different growing seasons were discussed. Data were taken on harvest index, grain yield, plant dry matter, plant height, panicle number per plant, spkelet number per panicle, fertility and 1000-grain weight. The studies showed that the factors of harvest index, grain yield and plant dry matter were lower in the second crop than those in the first. Correlation studies revealed positive association of harvest index with grain yield in the second crop but no association in the first crop. Harvest index also negatively associated with plant dry matter in the first crop. Grain yield and plant dry matter showed positive association with plant height, heading date and spikelet number per panicle and 1000-grain weight in both crop seasons. In addition, panicle number per plant also associated positively with grain yield in the first crop. Generally, the genotypic correlations agreed with phenotypic correlations though the magnitude of the values was higher in the former case. In path analysis grain yield showed a high positive effect on harvest index. On the other hand, direct effect of plant dry matter on harvest index was negative; however, it showed high positive indirect effect through grain yield in the second crop. In the first crop, panicle number per plant and spikelet number per panicle showed the highest effect on grain yield, while 1000-grain weight, plant height and spikelet number per planicle showed the highest direct effect on plant dry matter. In the second crop, spikelet number per panicle and fertility showed the highest direct effect on both the grain and the plant dry matter, but 1000-grain weight showed negative direct effect on both of them. The use of phenotypic or genotypic correlations in path analysis resulted in similar conclusions. It is, theregfore, suggested that either phenotypic or genotypic correlations may be used in path analysis with equal efficiency. |
本系統中英文摘要資訊取自各篇刊載內容。