頁籤選單縮合
題 名 | 高粱磷鉀肥效應之研究 |
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作 者 | 蔡宜峰; 賴文龍; 黃祥慶; | 書刊名 | 臺中區農業改良場研究彙報 |
卷 期 | 26 1990.03[民79.03] |
頁 次 | 頁31-40 |
分類號 | 434.157 |
關鍵詞 | 高粱; 磷鉀肥; |
語 文 | 中文(Chinese) |
中文摘要 | 本試驗目的在於探討中部粘板岩沖積土地區施用磷肥及鉀肥對高粱生 育之影響。經兩期缽栽及一期田間試驗,結果顯示,施用磷肥或鉀肥都有增加土 壤或高粱植體中磷及鉀含量的效果。磷肥處理對高粱生育初期的影響較顯著。增 加鉀肥用量會降低高粱植體中鈣及鎂的含量或吸收量,而高粱植體中鉀含量與鈣 及鎂含量在高粱不同生育期間均呈顯著的直線負相關性。推斷原因,可能是鉀肥 用量過多,使土壤中K/Ca及K/Mg比率增高而影響高粱吸收鈣及鎂的作用。綜 合高粱植株乾物重指數及產量分析,本試區土壤磷肥施用適量約為P2O5 60kg/ha,鉀肥施用適量約為K2O 80kg/ha。 |
英文摘要 | A field experiment and two pot experiments were conducted to study the response of sorghum to P and K fertilizers in slate alluvial soils in central Taiwan. The results showed that the application of P and K fertilizers increased the contents of P and K in soil and plant tissue respectively. The treatments and uptakes of P fertilizer significantly affected the contents of P in plant tissue at 30 days after seedling emergence. In K fertilizer treatments, the contents and uptakes of Ca and Mg in plant tissue decreased with the application rate of K. Statisical analysis showed there were negatively linear correlation between K concentration and either Ca or Mg concentrations in plant tissue at different stages of development. Therefore, with the high application rate of K fertilizer, the soil K/Ca and K/Mg ratio would increased, resulted in the reduction of uptakes of Ca and Mg by plant. The results also showed the optimum range of P and K fertilizers should be P2O5 60 kg/ha and K2O 80 kg/ha. |
本系統中英文摘要資訊取自各篇刊載內容。