|Title:||土壤酸度對於香茅草油分品質之影響||Other Titles:||Effect of Soil pH Value on the Oil Yield and Quality of Citronella Grass||Authors:||楊永裕
|Issue Date:||6-Dec-1977||Publisher:||農業試驗所||Journal Volume:||26||Journal Issue:||4||Start page/Pages:||314-319||Source:||中華農業研究||Abstract:||
In order to clarify the effect of different soil pH on the oil yield and quality of Citronella Grass, the pot culture experiment and chemical analysis was conducted. Special emphasis was put on the growth of Citronella on the strong alkaline soil of the upper steam region of Tseng Wen Dam, where is regarded as barren land and no crops can be cultivated. The experimental soil with pH 4.2 was taken from hilly land of Chung-Ho Town. The soil was adjusted to pH 5.5 and pH 6.5 by liming. The soil with pH 7.6 was also taken from Tsocheng, Tainan Prefecture. Thus, four different soil pH values (pH 4.2, 5.5, 6.5 and 7.6) was laid out in a complete randomized block design with six replications for pot culture experiment. The results of experiment with six harvests during two years are summarized as follows:
1. Citronella grown on the soil of pH 4.2 showed a decrease in plant height, tiller number, grass yield, and especially oil yield as compared with that grown on other soils. It was found that the growth of Citronella grass was unsuitable in this strong acidic soil.
2. The soil taken from barren hilly land pH 7 .6 was found to be better in the growth of grass and higher in grass yield, oil yield and citronellal content. It was suggested that this strong alkaline hilly land can be recommended for cultivation of Citronell grass to improve the utilization arid soil conservation of land.
3. The treatment of pH 6.5 soil, which was limed from acidic soil, showed the highest growth rate of plant height, tiller number, fresh grass yield and oil yield, suggesting the importance of liming to the acidic soil.
4. Leaf blade was cut six times before harvest by microtome to investigate the distribution of oil drops in the tissue. The result of observation by microscope indicated that distribution of tiny oil drops was the largest in the sample of the treatment of pH 6.5, that of treatment of 7 .6 came next, and that of pH 4.2 was the smallest.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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