速成堆肥法による稲藁堆肥の腐熟過程について
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概要
- 論文の詳細を見る
To throw light upon the humification process during the heaping of "Sokusei Taihi" method which was deviced before two decades by Agricultural Experiment Station in the Ministry of Agriculture and Forestry, for the purpose of obtaining well-rotted compost as short time as possible, and recommended up to now, humification process was investigated in the scale of 1/1875 of the usual standard process. And the sample taken at the end of the pre-heaping period, namely after 14 days; the second sample taken in the main-heaping period, namely after 31 days; the third one, after 45 days; the forth one, after 73 days; the fifth one, namely after 99 days were analysed, respectively, on the chemical components by the WAKSMAN'S proximate analysis with some modification. And they were compared with the original sample, and investigated the humification process. The diminutions of dry matter and organic matter in the pre-heaping period, when only lime was applied, are very slow, but the color darkens a little, fat and oil decreases, and the compost becomes emolient. After the addition of nitrogen, the diminutions of them are rapid and cellulose content decreases sooner than that of hemicellulose. The hemicellulose is subtracted from 2% HCl soluble organic matter residue to give presumably uronic acid, bacterial and fungus slimes and gums. This part increases in main-heaping period, when the microbial activity is vigorous, as shown in Table 1 and then decreases very slowly, and when the compost is applied to soil, this part is presumed to play a roll for the improvement of soil structure. The gradual increase in the base exchange capacity in each sample of rice straw compost as humification proceeds, is estimated that this relates to the increase of the 72% insoluble matter which is, namely, lignin or lignin-humus complex, and also to the oxidation degree of the lignin-humus complex. And finally, these experiments suggest (cf. Fig. 1) that the 45th days humification is enough to obtain well-rotted compost of rice straw by "Sokusei Taihi" method.[table]
- 大阪府立大学の論文
- 1958-02-15