Study on Fertilizer Effect of Sludge from Leather Processing for Rice Plant

수도(水稻)에 대(對)한 피혁가공(皮革加工) 폐기물(廢棄物) 스럿지의 비효(肥效)에 관(關)한 연구(硏究)

An experiment was conducted to determine the effects of sludges from leather and paper processing as sources of fertilizers on the rice. The results obtained are summarized as follows; 1. When 1,000kg of composts, 500kg of leather sludges and 500kg of leather sludge plus 100kg of $CaCO_3$, were applied per 10a, there were 7 to 10% of yield increase overthe non-treatment (check). When 1,000kg of paper sludge and 1,000kg of leather sludge plus 100kg of $CaCO_3$ were applied per 10a, there were 22 to 23% of yield increase over the check plot. 2. It was apparent that one of the reasons for increased yield. components such as number of spike and ripening ratio was due to the promotion of sludge decomposition by the $CaCO_3$. 3. The reason for the high ripening ratio and increased number of spike when paper sludge was applied might be due to the effects of high amount of nitrogen and phosphorous contained in paper sludge. 4. Effects of leather or paper sludges on the rice as organic fertilizer were highly appreciable, but further studies will be necessary for the effects of heavy minerals contained in the paper or leather sludges.

수도(水稻)에 대(對)한 피혁가공(皮革加工) 스럿지와 제지(製紙)스럿지를 비료자원으로 활용(活用)할수 있는가를 검토(檢討)하기 위(爲)하여 실험(實驗)한 결과(結果)는 다음과 같다. 1) 무처리(無處理)에 비(比)해 퇴비(堆肥) 1,000kg, 피혁(皮革)스럿지 500kg, 피혁(皮革)스럿지 $500kg+CaCO_3$, 100kg 시용(施用)한것은 7~10%, 제지(製紙)스럿지 1,000kg 및 피혁(皮革)스럿지 $1,000kg+CaCO_3$ 100kg 시용구(施用區)는 22~23% 증수(增收)되었다. 2) 피혁(皮革)스럿지 $1,000kg+CaCO_3$ 100kg시용구(施用區)에서의 수수(穗數), 수당입수(穗當粒數), 등숙률(登熟率)의 증가(增加)는 석회시용(石灰施用)에 의한 스럿지분해촉진 결과(結果)였다. 3) 제지(製紙)스럿지 1,000kg구(區)에서의 수수(穗數)와 등숙률(登熟率)이 높은것은 스럿지의 질소(窒素)와 인산(燐酸) 함량(含量)이 높기 때문이다. 4) 피혁(皮革) 및 제지(製紙)스럿지는 유기물(有機物)로서의 비효(肥效)는 인정(認定)되나 장차(將次) 유해중금속(有害重金屬)의 함량(含量)과 그 영향(影響)에 관(關)한 연구(硏究)가 필요(必要)하다고 본다.