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您的检索式：作者名="Hanna Help"
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| 1 | Fertilizer and soil conditioner value of broiler manure biochars显示文摘Pyrolysis is an option for enhancing the sustainable management of broiler manure surpluses by producing a concentrated,hygienic char product with a fertilizer and soil conditioner value.In this study,the impacts of pyrolysis conducted at 350,400 and 450℃ on total nutrient and harmful element concentrations in biochars derived from peat-bedded broiler manure were examined.Emphasis was placed on the availability of phosphorus(P).In addition,the pore structures of these biochars were explored using X-ray microtomography and image analysis.During pyrolysis,35-50%,40-55%and 35-45%of the original carbon,nitrogen and sulfur contents,respectively,of the feedstock biomass were lost as volatiles.Mineral elements,including P,were concentrated in the biochar.Although water-extractable P was found to be converted to less labile forms due to charring,the concentration effect and notable increase in sodium bicarbonate-extractable P rendered broiler manure biochars richer in total labile P in comparison with feedstock manure(7.1,10.0,11.1 and 14.8 g labile P kg^(−1)in feedstock and biochars produced at 350,400 and 450℃,respectively).The pore volume of the micrometer-scale porosity of the broiler manure biochar was comparable to that found earlier in wood-based biochars.In comparison with wood-based biochars,the pore structure of broiler manure biochars was more versatile,and the pore size distribution was wider.Consequently,part of the porosity was too large to store plant-available water,which may reduce the potential of broiler manure biochars to improve soil water storage capacity. | Riikka Keskinen Jari Hyvaluoma Lauri Sohlo Hanna Help Kimmo Rasa | 2019 | Biochar2019，1，3： | 1 |
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