퇴비의 전질소와 암모니아 함량이 양송이 수량에 미치는 영향 = The Effects of Total Nitrogen and Residual Ammonia Contents of Compost on the Yield of Cultivated Mushroom , Agaricus Bisporus

다국어 초록 (Multilingual Abstract)

Among the factors which affect the mushroom yield. this investigation was aimed to confim the relationship between nitrogen content of rice straw compost and crop yield, residual ammonia content and yield. In this investigation the nitrogen content in dry weight of compost ranged from 1.10 to 2.06% and the residual ammonia content between 0.01 and 0.8% at spawning according to the sources of organic or inorganic nitrogen and the formulas of compost materials.
The results obtained are summarized as follows:
1. The relationship between nitrogen content of rice straw compost anti mushroom yield was represented by the formula: y=13.95+0.048(r=0.68^(**)).
2. Nitrogen content and mushroom yield of compost supplemented with organic nitrogen sources were increased as compared with control or inorganic treatments.
3. The relationship between the residual ammonia content and mushroom yield is represented by the formula: y=0.38086-0.011948+0.0012x²(r=-0.75^(**)). In order to obtain high cropping yield the residual ammonia content at spawning should be below 0.03%(expressed as nitrogen content),
4. Application of ammonium sulfate increased the nitrogen content of compost slightly, but the residual ammonia content was increased considerably and yield decreased. On the other hand, the residual ammonia content of urea treatment was low and increased mushroom yield remarkably.