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題名 | 不同石灰需要量決定法之石灰用量對作物生育和養分吸收的影響評估 |
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作者 | 陳仁炫; | 書刊名 | 中華農學會報 |
卷期 | 169 1995.03[民84.03] |
頁次 | 頁90-106 |
分類號 | 434.22 |
關鍵詞 | 石灰需要量; 養分吸收; 鋁飽和度; 強酸性土壤; Lime requirement; Nutrient uptake; Al saturation; Strongly acid soils; |
語文 | 中文(Chinese) |
中文摘要 | 石灰施用為改良強酸性土壤最經濟有效的方法,唯其改良效果深受石灰施用量的適宜與否影響。土壤的石灰需要量測定方法甚多,而其估算量卻互異,實有待評估其適用性。本試驗乃藉由五種測定法所決定的石灰施用量對玉米之生育和養分吸收(磷、鉀、鈣和鎂)的效應予以評估,來尋求最經濟及適用的石灰需要量決定法。本試驗取三種不同土類的強酸性土壤(北溝、大肚山和中寮),分別施入由SMP-Double、Woodruff-Improved、Adams-Evans、降低鋁飽和度至10%,以及直接培育到pH6.5所得之碳酸鈣量,然後以盆栽方式栽種玉米。一個月後測定玉米生育及養分吸收情形,以評估各方法之經濟效應。試驗結果顯示,降低鋁飽和度到10%的方法之每單位石灰用量所得之玉米植株生育及養分吸收效應最高;亦即可用較少想的石灰用量而得到相對較高的效率,且能兼顧作物的生育和養分的吸收,故值得推薦作為決定本省強酸性土壤石灰需要量的方法。 |
英文摘要 | Liming is the most economical and useful practice of reclaim strongly acid soils. However, the efficiency of liming is strongly affected by the amount of lime applied to soils, and the lime requirements for acid soils were varied with the methods used. The purpose of this study was to evaluate five lime requirement methods, based on the growth of corn and nutrient (P, K, Ca and Mg) uptake by corn. Three acidic soils (Bei-Go, Da-Do San and Chung-Liao) varying in their chemical characteristic were used. Different amounts of lime that estimated by the methods of SMP-Double, Woodruff-Improved, Adams-Evans, Al saturation (10%) and Lime incubation (pH 6.5) were applied, and a pot experiment was conducted. After one month, growth and nutrient uptake of corn were determined. Results showed that the lime requirement estimated by reducing Al saturation to 10% was the most economical among the test methods. In another words, the method of reducing Al saturation (10%) has higher relative corm growth and nutrient uptake, therefore, it is recommended to be used to estimate the lime requirement of the strong acid soils in Taiwan. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。