(30(4):357-361)Effect of different staking methods on the quality and yield of Dioscorea alata L.

Abstract

為了探討不同支架型式對於山藥(Dioscorea alata L.)塊根產量及品質之影響,乃舉行本研究。本研究自1979年1月至1980年2月止。依支架型式不同分為高支架(6尺),中支架(4尺半),矮支架(3尺),半弧形支架(3尺)及對照區(黑色塑膠布覆蓋)計有5種處理。玆將研究結果摘述如下: 1. 山藥初期生育受不同支架之影響,各處理間差異大,株高、節數、分蘗數均以半弧形支架(3尺)處理較佳。 2. 支架型式以高支架(6尺)處理對地上部莖葉之乾重量,每株平均比對照(黑色塑膠布覆蓋)處理可增加36%,半弧形支架(3尺)處理增加10%;地下部之塊根產量平均每株高支架(6尺)處理可增加33%,半弧形支架(3尺)處理增加11%,中支架(4.5尺)處理增加2%;由於高支架(6尺)處理有利於塊根之肥大,其他半弧形支架(3尺)及中支架(4尺半)處理亦佳,產量各增加0.154,0.051及0.01kg/株。 3. 以單位面積產量言,高支架(6尺)處理時產量最佳,對地下部塊根產量每公頃比對照(黑色塑膠布覆蓋)可增加33%;且根形,品質均屬最佳,蛋白質含量提高2.83%;其次半弧形支架(3尺)處理可增加11%,根形,品質亦佳,其蛋白質含量亦提高0.83%;其他中支架(4尺半)及矮支架(3尺)處理蛋白質含量均有提高之趨勢。For studying the effect of staking types on the yield and quality of Dioscorea alata L., highΛ-type staking (6 feet), middleΛ-type staking (4.5 feet), IowΛ-type staking (3 feet), arc type staking (3 feet) and control (non-staking) were used. Arc type staking was the best on plant height, no. of internodes and no. of tillages for plant growth stage but was for tuber root growth stage. Staking showed an advantage on plant and tuber root growth by increasing plant dry weight, yield, protein content and Shape of tuber rool. High staking increased 33% (4928 kg/ha) in tuber root yield, 36% in dry weight of upper part, and 2.83% in protein content compared with non-staking. Whereas, arc type staking increased 11% (1632 kg/ha) in tuber root yield, 10% in dry eight of upper part, and 0.83% in protein content compared with non-staking

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