| Abstrakt: |
This study aimed to determine optimal Chrysanthemum growth on two composts of different qualities applied at different rates: swine compost (immature) and commercial compost (mature). The chemical characteristics of the two composts were estimated in combination with commercial soil at 0%, 10%, and 25% (w/w), respectively. The values of essential nutrients, beneficial heavy metals, and Pb concentration were enhanced significantly with a high rate of mature compost application in both soil and plant cells. In addition, plant growth was better than the control; the highest plant fresh weight and leaf area were significantly increased up to 74% and 60%, respectively; however, no difference was found in the plant height. Available nutrients and potential heavy metals in the soil with a high rate of immature compost application were indicated to be the same as those after 10% mature compost application. However, the reasonable compost level for the cultivation of Chrysanthemum was 10% and 25% for commercial and swine composts, respectively. Because a high rate of immature compost application could lower the pH and induce inefficiency in certain nutrients during the period of juvenile plant development, this compost should be applied carefully. [ABSTRACT FROM AUTHOR] |
