caa a22 4500 388054220 CHVBK 20180307125101.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1017/S0889189300007815 doi S0889189300007815 pii (NATIONALLICENCE)cambridge-10.1017/S0889189300007815 Soil Improvement Following Addition of Chipped Wood from Twigs [Elektronische Daten] Wood residues are applied to soils to improve their organic matter content and related biological, physical, and chemical properties. We monitored the changes in soil total C and N content, the bacterial, fungal and actinomycetal populations, and microbial biomass and activity during 20 weeks in the first season following the application of chipped wood from twigs (CWT), and as residual effects during the second growing season on a loamy soil (coarse loamy, mixed, frigid, Humic Fragiorthod) in Sainte-Brigitte-des-Saults (Québec) Canada. Wet-aggregate stability and the content of nutrients of the soil also were determined. Adding CWT stimulated the bacterial and actinomycetal populations very rapidly (within 8 weeks); in the second season the effect was less pronounced and gradually disappeared. The most significant and long-lasting effect was on the fungal population in two consecutive years of observation, with increases of up to 24-fold. This stimulation of fungi possibly was responsible for the large and significant increase in wet-aggregate stability observed in the second year. The effect of CWT on alkaline phosphatase activity and total C and N was observed only in the second season. Some immobilization was seen only in the season immediately following residue application. The addition of the CWT also supplied micronutrients, in particular Zn, which would make it a useful source of some elements in deficient soils. Application of CWT to this soil greatly improved its quality, as revealed by its biological, chemical, and physical attributes. Copyright © Cambridge University Press 1998 microbial populations nationallicence soil structure nationallicence mineral content nationallicence soil bacteria nationallicence actinomycetes nationallicence fungi nationallicence soil organic matter nationallicence Lalande Roger Soil Microbiologist, Centre de recherche et de développement sur les sols et les grandes cultures, Agriculture et Agroalimentaire Canada, 2560, boul. Hochelaga, Sainte-Foy (Québec), Canada G1V 2J3 Furlan Valentin Mycorrhizologist, Centre de recherche et de développement sur les sols et les grandes cultures, Agriculture et Agroalimentaire Canada, 2560, boul. Hochelaga, Sainte-Foy (Québec), Canada G1V 2J3 Angers Denis A. Soil Scientist, Centre de recherche et de développement sur les sols et les grandes cultures, Agriculture et Agroalimentaire Canada, 2560, boul. Hochelaga, Sainte-Foy (Québec), Canada G1V 2J3 Lemieux Gilles Professor, Département des sciences du bois et de la forét, Faculté de foresterie et de géomatique, Université Laval, Québec (Québec), Canada G1K 7P4. American Journal of Alternative Agriculture Cambridge University Press 13/3(1998-09), 132-137 0889-1893 13:3<132 1998 13 AJA https://doi.org/10.1017/S0889189300007815 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0889189300007815 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lalande Roger Soil Microbiologist, Centre de recherche et de développement sur les sols et les grandes cultures, Agriculture et Agroalimentaire Canada, 2560, boul. Hochelaga, Sainte-Foy (Québec), Canada G1V 2J3 NATIONALLICENCE 700 1- Furlan Valentin Mycorrhizologist, Centre de recherche et de développement sur les sols et les grandes cultures, Agriculture et Agroalimentaire Canada, 2560, boul. Hochelaga, Sainte-Foy (Québec), Canada G1V 2J3 NATIONALLICENCE 700 1- Angers Denis A. Soil Scientist, Centre de recherche et de développement sur les sols et les grandes cultures, Agriculture et Agroalimentaire Canada, 2560, boul. Hochelaga, Sainte-Foy (Québec), Canada G1V 2J3 NATIONALLICENCE 700 1- Lemieux Gilles Professor, Département des sciences du bois et de la forét, Faculté de foresterie et de géomatique, Université Laval, Québec (Québec), Canada G1K 7P4 NATIONALLICENCE 773 0- American Journal of Alternative Agriculture Cambridge University Press 13/3(1998-09), 132-137 0889-1893 13:3<132 1998 13 AJA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge