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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Utilization of Organic Waste Materials in Agriculture I. Effects of OWM on the Growth and Yield of Lowland Rice : First Trial ) ผู้เขียน: ดร.ศุภมาศ พนิชศักดิ์พัฒนา, ศาสตราจารย์เกียรติคุณ ,  สุริยา สาสนรักกิจ, นายสรสิทธิ์ วัชโรทยาน, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractSeven treatments of fertilizer and organic waste materiats (OWM) namely rice straw compost (RSC), activated sludge from beer factory (AS), activated sludge from whisky factory (SW), filter cake from sugar refinery factory (FC), castor meal (CM), inorganic fertilizer (F), and check (Ch) were used in the study. The results indicated that in RSC treatment, initial growth of rice as measured by dry matter of shoot and root and tiller number was very active until before flowering stage. After flowering, however, the plant showed N-dificiency symptom and slow growth were observed throughout planting period. In CM treatment, slow growth during initial growth stage was seen from plants grown in both Rangsit and Roi Et soils. After flowering, the plant in the treatment started growing rapidly until harvesting period. Relation between rice growth and yield was also observed in the experiment. Rice yield corresponded quite well with plant growth at the later growth stage. The yield could be ranked in the following order : Rangsit soil : F > CM >, AS, FC >/ SW, RSC >, Ch Roi Et soil : CM, F > AS, SW > RSC, FC >, Ch Most of released N from OWM was observed from the initial plant growth to flowering stage except that from CM which showed opposite result. If efficiency of OWM as N-source was considered, CM was regarded as the highest one when approximately 60% of its total N was available to the rice plant whereas RSC was among the lowest when only 6-8% of its total N could be utilized by the plant. In addition, nitrogen content in grain and straw of the rice grown in CM treatment was remarkedly high whereas that in RSC treatment was considerably low. It was noticeable that the rice plant grown in Rangsit soil applied with FC showed considerably high content of phosphorus in both grain and straw. |
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