洋菇覆蓋土改良之研究－土壤團粒及各種物質對洋菇產量之影響

Abstract

（1）根據實驗分析結果得知土壤之孔隙量及容水量由團粒之大小不同而有差異即粒徑愈小其容水量愈大，在孔隙量粒徑愈大亦隨之大，各種不同材料中蔗渣的孔隙量與容水量均較高於穀殼粉及泥炭。 （2）土壤團粒之大小對洋菇產量以土壤粒徑1.0mm~0.5mm較優，泥炭對洋菇產量，土壤混合率25％處理區最高，若泥炭的用量過多時雖不致減少，也無法提高洋菇產量，穀殼粉土壤分層使用可能保持良好的孔隙量故其產量較優於土壤混合使用區，蔗渣本身之容水量孔隙量雖然高於其他材料區，但不見到較好的效應。 （3）本次試驗僅探討土壤團粒度，及泥炭，穀殼粉，蔗渣等與土壤混合做覆蓋土時之孔隙量，容水量之差異情形及洋菇生產之影響，獲得初步結果，卻尋求理想的覆蓋土，土壤應有之處理或產量之影響尚待今後繼續研究。

The porosity and water holding capacity as well as the effect on mushroom yield of various casing soils which differ either in the size of granule or in the material incorporated (i. e., peat power. husk powder and bagasse power) were tested in this experiment. The primary results obtained were as follows: (1) The optimum size of granule for casing soil was observed about 1.0 mm~0.5 mm. (2) Among the casing soils in which different proportions of peat powder were incorporated that with 25 per cent peat was found most adequate for yield. (3) Although the bagasse powder showed both biggest porosity and water holding capacity among all the materials tested, no superior effect of the incorporation in casing soil was observed.