頁籤選單縮合
題 名 | 狼尾草栽培密度與施肥種類及方法試驗=Experiment on Spacing and Methods of Fertilization of Napiergrass |
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作 者 | 王啟柱; 許金生; | 書刊名 | 中華農學會報 |
卷 期 | 42 民52.06 |
頁 次 | 頁26-36 |
關鍵詞 | 狼尾草; 栽培密度; 施肥種類; |
語 文 | 中文(Chinese) |
英文摘要 | This experiment was conducted in 1960, to study the comparative effects of different spacings and kinds of manure and methods of application on the forage yield and cost of Napiergrass in Taiwan. The 2 (spacings) ×4(manures and applying methods) treatments were laid out in factorial design with three replications. The treatments of fertilization were used as top-dressing, while the amount of basal fertilizers of P2O5 and K2O applied in every treatment was the same. The forage yield increased significantly as the plant density increased. The grass with the inter-row spacing of 50 cm apart (50 cm × 33 cm) produced 36.8% higher than that of the 100 cm (100 cm × 33 cm) one. The fresh cattle-dung (0.29% N) and the compost, made from the dung, of the organic manure applied with the equivalent amount as N45 kg/ha were used in order to compare with N30 and N60 of the chemical fertilizer, ammonium sulphate (20.5%N). Although the organic manures showed to be little worse than the chemical fertilizers in the first year, yet they became increasingly better thereafter. The differences among them were not significant. The interaction between the spacing and manure was rather significant. The organic manures yielded higher tonnage with the spacing of 50 cm than that of 100 cm; on the contraty, the chemical fertilizers, higher with 100 cm than 50 cm. There was considerable response in tonnage at two spacings to the different levels of chemical fertilizer application. However, the tonnage increased markedly with the increment of N level, N60 gave 34.1% more forage than N30 in the spacing of 100 cm, on the other hand, it surpassed 8.5% only in the spacing of 50 cm. The greatest increase in forage yield with increasing plant density occurred at the applicaiton of the fresh cattle-dung. Such treatment combination produced 18.2% more than the treatment of N30 (or 600 kg/ha ammonium sulphate, per year), and 10.9% more than N60 (or 1,200 kg/ha ammonium sulphate) in the same spacing. The reason might be that the fresh cattle-dung distributed thoroughly over the inter-row of smaller spacing (50 cm), thick enough as good mulch, which not only supplied fertility and conserved water for the crop, but also controlled weeds. Compost was not so effective as the cattle-dung, perhaps, due to the less potentiality of weed control by mulching. |
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