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The production of phosphocomposts and the evaluation of their effects in the improving soil productivity of a strongly acid soil
|關鍵字:||phosphocompost;高磷堆肥;strongly acid soil;cabbage;compost;強酸性土壤;甘藍;堆肥||出版社:||土壤環境科學系||摘要:||
Generally, the amount of organic fertilizer applied were mostly estimated by the rate of mineralization and the requirement of nitrogen by plants, and without considering the supply status of phosphate in soils. Phosphorus deficiency may be occurred as the amount of organic fertilizer was estimated by the N requirement of plant in strongly acid soils due to their high P fixing ability. The purposes of this study were to make phosphocomposts that were suitable for strongly acid soils by composting poultry manure with rock phosphate powder and bone powder, then evaluated their fertilizer effect and the effects on the plant growth as well as soil productivity improvement.
The phosphocomost used poultry manure for nitrogen source, rice hull for carbon source, and rock phosphate or bone powder for phosphate source with adding sulfur or not.After the phospho- composts were composted, the better treatments were chosen to conduct a pot experiment in strongly acid Da-Do Shan soil and compared their effects to those non-composted poultry manure, rice hull, and bone powder, Results had shown that all the phosphocomposts were high in phosphate content and met the requirement of poultry manure composts, except with lower N content. The adding of sulfur significantly decreased the pH of phosphocomposts and reduced NH3 volatilization. The effect of phosphate content by S addition was not significant due to the uncompleted oxidation of sulfur or less amount of S addition. Both phosphocomposts and poultry manure were shown to increase soil pH, organic matter content, nitrogen and phosphate availability of Da-Do Shan soil, and improve cabbage growth compared to the treatment that only chemical fertilizer was applied. It indicated that the amount of phosphocomposts estimated by the N requirement of plants not only could improve the productivities of strongly acid soils, but also prevent the deficiency of phosphate being occurred due to high P fixing ability of acid soils.
|Appears in Collections:||土壤環境科學系|
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