廢水污泥利用於蘿蔔生產之初步研完

A Preliminary Study on the Utilizatuon of Wastewater Sludge for Radish Production

脫水污泥係都市下水道，廢水處理後之主要殘留物；其用途仍有待開發。本試驗主旨在於探討脫水污泥在農業生產上利用的效果。用蘿蔔大梅花品種為試驗材料，經分析土壤肥力與作物產量，結果顯示；（1）脫水污泥有提高土壤有機質及全氮含量現象，亦能改善有放磷、鉀的含量，以增進土壤肥力之效果；亦有誰持土壤pH值穩定之趨勢。而在試驗期間，土壤質地亦未受改變。（2）脫水污泥能提高蘿蔔產量，且在每公頃使用45公頓以內，蘿蔔產量與污泥之使用量有顯著的正相關；脫水污泥對蘿蔔莖葉產量亦有相當效果。（3）脫水污泥之適當施用量，可能因土壤質地，肥力及作物種類等之不同而有差別，且與化學肥料之適當組合等尚有待進一步試驗探討。

The experiment is to find out the utilization of wastewater sludge for agricultural production. The trial was carried out in field with sandy loam and in pot culture with loamy sand soil respectively. The analysis on the soil fertility and the statistical analysis of root and leaves of radish revealed that: (1) The sludge applied in cropcultivation could improve the fertility of soil, increased the amount of organic matter, total nitrogen, as well as available phosphorus and potassium; Besides, the pH value showed stable, and the soil texture remained unchanged during the experiments. (2) The relationship between the yield of radish and the amount of sludge applied was positive significant; The more the sludge applied, the higher the yields of radish under the experiment. The application of sludge was also favorable for the vegetative production. (3) An optimun quantity of sludge applied to the crop cultivation depends on fertility and texture of soil and different crops. A proper combination of sludge and application of fertilizers for a certain crop is to be studied.