축산폐기물(畜産廢棄物)의 이용(利用)에 관(關)한 연구(硏究) : 가축분뇨(家畜糞尿)가 토양화학성(土壤化學性) 및 옥수수 생육(生育)에 미치는 영향(影響)

Influence of animal wastes on the soil fertility parameters and the growth of corn (Zea mays L.)

축산폐기물중(畜産廢棄物中) 우분(牛糞)과 돈분(豚糞)을 호기성(好氣性) 퇴적법(堆積法)에 의해 부숙(腐熟)시킨후(시제품(試製品)) 토양(土壤)에 몇가지 수준(水準)으로 처리(處理)하여 옥수수의 생육(生育), 수량(收量)과 토양 및 소화율(消化率)에 미치는 영향에 관한 시험을 실시(實施)한 결과는 다음과 같다. 1. 생육상황(生育狀況)은 시제품처리구들이 대조구에 비해 모두 양호하였고 수량면(收量面)에서는 부숙우분의 경우 2,000kg/10a처리구가 부숙돈분의 경우 2,500kg/10a처리구가 제일 많았다. 2. 시제품처리에 따라 토양유기물함량(土壤有機物含量)은 증가(增加)하였고 대조구에 비해 부숙우분의 경우 7~41% 부숙돈분의 경우 4~60%정도 증가시켰다. 유효인산(有效燐酸)의 경우 시제품처리에 따라 유의성있게 증가하였다. 칼륨흡착비(吸着比)(KAR)는 부숙우분을 처리함에 따라 다소 증가하는 경향이었다. 3. 식물체(植物體)의 양분흡수(養分吸收)에 있어서 T-N $P_2O_5$는 두시제품 공히 차이가 없으나 양(陽)이온의 흡수(吸收)는 $K_2O$ >CaO>MgO의 순이었다. 4. 청예(靑刈) 옥수수의 소비율(消化率)은 배양시간이 경과할수록 증가하였으나, 시제품처리구 간에는 차이가 없었다.

This research was conducted to investigate the treatment effects of the experimental product of an oxidatively treated animal wastes such as feces of cow and pig on the growth and yield of corn, soil fertility parameters, nutrient uptake by corn, and in situ dry matter digestibility. The results are summarized as follows. (1) Growth of corn was favored by treatment of the experimental products as compared to the control. Highest yields were obtained at treatment levels of 2,000 and 2,500kg/10a for the experimental products derived from cow and pig feces, respectively. (2) The contents of soil organic matter were increased 7-41% and 4-60% with treatments of experimental products from cow and pig feces, respectively, as compared to the control. The available soil phosphorus levels were increased significantly with the treatments. Treatment of product from the cow feces resulted in a slight increase of the potassium adsorption ratio (KAR). (3) No significant difference was observed in uptake of total nitrogen and phosphorus between the treatments and the control. Uptake of cation by corn was in the order of $K_2O$ >CaO>MgO. (4) In situ dry matter digestibility ratio was increased with Incubation time. However, no significant difference in digestibility was detected for the corn samples produced by treating different levels of the experimental products.