| Summary: | 碩士 === 國立臺灣大學 === 農業化學研究所 === 91 === Abstract
Crops responses differently to various organic fertilizers due to different properties. The purpose of this study was to investigate the nutritional-physiological responses of cabbage, kohlrabi, and rice plants to different rates and different kinds of organic fertilizers. The study was conducted in Chishan Banch Station, Kaohsiung District Agriculture Improvement Station, Kaohsiung. There were two studies, one investigated the nutritional-physiological responses of cabbage and rice plants to four different kinds of organic fertilizers which were farm-yard manure, hog dung manure, cattle dung manure, and seed residue compost, the other investigated the effects of different rates of hog dung manure on kohlrabi growth and cattle dung manure on rice plant growth. In the later, the four rates of organic fertilizers were based on the amount of nitrogen fertilizer applied in the chemical fertilizer treated plot. A chemical fertilizer treated plot and a no fertilizer treated plot were also conducted in the two studies.
The result showed that the dry weight and uptake of nitrogen, phosphorus, potassium, and magnesium of cabbage of cattle manure treated plot were higher than those of other treatments 26 days after transplanting. However, uptake of calcium, iron, manganese, and zinc were high in chemical fertilizer treatment. The dry weight and uptake of nitrogen, iron, manganese, and zinc of cabbage were higher in chemical fertilizer treatment 56 days after transplanting. However, the uptake of potassium and calcium were higher in farm yard manure treated plot and the uptake of phosphorus and magnesium were higher in cattle manure treatment. The dry weight and the uptake of nutrients other than manganese of rice plants were higher in hog dung manure treated plot than those of the other treatments at active tillering stage. However, the dry weight and nutrient uptake of rice plants were higher in hog dung manure treated plot at maturity stage. The dry weight and uptake of nutrients of kohlrabi of chemical fertilizer treated plot were higher than those of other treatments 20 days after transplanting. However, the dry weight and nutrient uptake other than magnesium of kohlrabi were higher in triple hog dung manure treatment. The dry weight and nutrient uptake other than manganese and zinc of rice plants were higher in triple cattle dung manure treatment at active tillering stage. However, the dry weight and nutrient uptake other than manganese were higher in quartic cattle dung manure treatment at maturity stage.
Key words: cabbage, kohlrabi, rice plants, organic fertilizer.
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