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題名 | 栽植密度、肥料用量對水稻穗型變動之影響 |
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作者 | 劉村明; | 書刊名 | 中華農學會報 |
卷期 | 140 1987.12[民76.12] |
頁次 | 頁1-10 |
分類號 | 434.111 |
關鍵詞 | 水稻; 肥料用量; 栽植密度; 穗型; |
語文 | 中文(Chinese) |
中文摘要 | 本試驗以不同栽植密度及施肥量處理來探求對水稻穗型之變動,其主要結果如下: 1. 穗長、一次枝梗數、穗軸各節位之二次枝梗數及二次枝梗粒數均隨栽植密度之增加而急減,特別是下位穗軸節位之二次枝梗數及二次枝梗粒數皆有顯著之減少,使穗型由下位優勢型轉變為中位優勢型。 2. 施肥量愈高時,對穗長、一次枝梗數、穗軸各節位之二次枝梗數及二次枝梗粒數呈稍些增加之傾向,但對穗型之變動影響不大。 3. 穗軸各節位之一次枝梗粒數,在任何栽植密度及施肥量下均是約6粒左右。 4. 栽植密度及施肥量之增加,對上、下位穗軸節位之二次枝梗粒數之減少影響不大。 5. 株內一次枝梗粒數及二次枝梗粒數枝變動,以同一一次枝梗數之穗來比較,栽植密度及施肥量愈高者其各穗軸節位之一次枝梗粒數及二次枝梗粒數愈減少。 |
英文摘要 | The study was conducted to investigate the effect of spacing and fertilizer levels on changes of ear type in rice. Results were sammarized as follows: 1. The close spacing caused drastic decrease in panicle length, number of primary branch per ear, number of grains on secondary branch at all the nodes of rachis. Especially, number of the secondary branch and number of grains on the secondary branch at the basal position of ear were decreased significantly. The close spacing also caused changes of ear type from the basal position to the middle position. 2. Higher level of fertilizer increased panicle length, number of the primary rachis-branch per ear. Number of the secondary rachis-branches and their grains at all the nodes of rachis. Ear type was not much influenced by the amount of fertilizer used. 3. The number of grains on the primary rachis-branch at the nodes of rachis remained the same 6 grains for all spacing and fertilizer levels. 4. Increase in spacing and fertilizer level slightly decreased the number of grains on secondary rachis-branch in the upper and basal position of ear. 5. Comparing ears with the same number of primary and secondary rachis-branches. The number of grains on these two type of branches decrease with higher fertilizer level and or higher planting density. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。