- 期刊
氮鉀肥施用量對懷山藥塊莖性狀及產量之效應
The Effect of Nitrogen and Potassium Fertilizers on Agronomic Characteristics and Tuber Yield of Chinese Yam (Dioscorea batatas)
摘要
為探討氮肥及鉀肥施用量對懷山藥（Dioscorea batatas）塊莖性狀及產量之影響，於1998年在桃園縣新屋鄉桃園區農業改良場進行田間試驗，試驗處理採用3種氮肥施用量90、140、190 kg/ha，及2種鉀肥施用量120、180 kg/ha，共6種處理組合，試驗設計採用逢機完全區集設計，結果顯示，懷山藥塊莖數目及塊莖分支受鉀肥施用量的影響，但鉀肥施用量處理間對塊莖產量無顯著差異，氮肥施用量從90～190 kg/ha對於懷山藥塊莖性狀及產量之差異均不顯著，6種氮鉀肥組合處理中塊莖分支數以90×180 kg/ha之組合，分支數最少，且與其他處理之差異顯著，塊莖產量則無顯著差異。由於氮鉀肥組合處理對塊莖產量均無顯著差異，因此，建議栽培懷山藥施用氮鉀肥時以90×120 kg/ha之最少投入組合為較經濟之施肥方式。
並列摘要
With an aim to study the effect of nitrogen and potassium fertilization on the agronomic characteristics and yield of tuber of Chinese yam, the field trail was conducted in 1998 at the experimental farm of Taoyuan District Agricultural Improvement Station. A factorial experiment was laid out in a randomized complete block design with six treatments involving three rates of nitrogen fertilizer (90 kg/ha, 140 kg/ha and 190 kg/ha) and with two rates of potassium fertilizer (120 kg/ha and 180 kg/ha).Experiment results indicated that the number and branch of tuber of Chinese yam was significantly affected by different rates of nitrogen and potassium fertilization, but tuber yield was not significantly affected by different rates of nitrogen and potassium fertilization.Yield of tuber was not significantly affected by different rates of nitrogen fertilization from 90 kg/ha to 190 kg/ha. The number of branch treated with 90 kg/ha nitrogen fertilization and 180 kg/ha potassium fertilization was significantly less than the other treatments.Because tuber yield of Chinese yam was not significantly affected by different rates of nitrogen and potassium fertilization, the nitrogen and potassium fertilization at the low rate of 90 × 120 kg/ha is recommended for Chinese yam.