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- Studies on the Yield and Yield Components of Rice under Different Environmental Conditions (2):On the relation among leaf age index, number of tillers and the stages of young panicle development in rice
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- 不同期作環境秧苗苗齡對稻株生育影響之研究(1):分蘖發育影響的探討
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頁籤選單縮合
題名 | Studies on the Yield and Yield Components of Rice under Different Environmental Conditions (2):On the relation among leaf age index, number of tillers and the stages of young panicle development in rice=不同環境下之稻產量構成要素之研究第二報: 葉齡指數及分蘖數與幼穗發育期之關係 |
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作者 | 謝順景; |
期刊 | 臺中區農業改良場研究彙報 |
出版日期 | 19851200 |
卷期 | 11 1985.12[民74.12] |
頁次 | 頁25-42 |
分類號 | 434.111 |
語文 | eng |
關鍵詞 | 分數; 幼穗; 產量; 發育; 葉齡指數; 稻; 環境; |
中文摘要 | 利用台中65號、嘉南242號、台中在來1號及菜園種四個水稻品種, 分別種植於台北及嘉義二地,並研究各品種幼穗發育期、幼穗長度、葉齡指數及 分蘗數間之關係及找出決定適量施用追肥期之指標。本試驗在三種施肥法及三種 栽植密度之設計下進行。在台北一期作稻之穗頸分化期之葉齡指數為77、枝梗 分化期為78∼87、小穗花分化期為84∼91、孕穗本期則為98∼100。本試驗結 果認為葉齡指數為決定施追肥適期之良好指標。當幼穗生長到枝梗分化期(IV- VIII期)時,即為最高分蘗期,而幼穗生長到2∼5mm最高分蘗期後5∼7天時為 施用"穗肥"的良好時期。分蘗數與幼穗長度間之相關係數為r=0.837∼0.880, 分蘗數與生育日數間之相關係數為r=0.443∼0.521因此分蘗數亦可做為決定施用 追肥的指標。在台北第一期作葉齡指數70時為最高分蘗期,在嘉義第一期作則在 葉齡指數70∼80時為最高分蘗期。葉齡指數與分蘗數間之相關係數為r=0.98。劍葉 與其下葉間之葉耳長度亦認為可做為判定減數分發時期及幼穗發育期之指標。葉耳 長度因品種栽植密度及地點不同而略受影響。最適當的時間分施肥料,可以提高稻 之最高產量。 |
英文摘要 | Four varieties of rice, Taichung 65, Chianung 242, Taichung (N) 1 and Tsai- yuan-chung were planted at Taipei and Chiayi to study the relations among young panicle length, young panicle developmental stage, leaf age index and tiller numbers so that to identify the reliable indicators for determining the time of fertilizer application. Three different methods of fertilizer application and three planting densities were used. It was observed that in the first crop at Taipei, leaf age index at the panicle neck differentiation stage was 77, that of the branch differentiation stage was 78-87, that of the spikelet differentiation stage was 84-91, and that of the end of panicle pregnancy period was 98-100. The leaf age index was considered to be a good indicator to determine the right time for top dressing of fertilizers. When the young panicles reached branch differentiation stage (IV-VIII), the tillering reached its maximum, and approximately 5-7 days after the maximum tillering stage, the young panicle increased its length to 2-5 mm. This was considered to be a good time for "panicle fertilizer" application. Correlation coefficient between number of tillers and young panicle length is r=0.837∼0.880, that between number of tillers and growing date is r=0.443∼0.521. Tiller number can also be served as an indicator to determine the developmental stages of young panicles. The maximum tillering stage was found to correspond to the leaf age index of 70 in the first crop at Taipei, and 70-80 in the first crop at Chiayi. Correlation coefficient between leaf age index and tiller number was r=0.98. The distance between the auricles of the flag leaf and that of the immediate lower leaf was also a good measurement to identify the different developmental stages of meiosis and young panicles, though it may vary according to varieties, planting densities and locations. The effectiveness of the splitted way of fertilization to bring about the high yield of rice was discussed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。