نوع مقاله : علمی - پژوهشی
نویسندگان
1 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی مازندران، سازمان تحقیقات، آموزش و ترویج کشاورزی، ساری، ایران
2 استادیار پژوهش، بخش تحقیقات خاک و آب، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی مازندران، سازمان تحقیقات، آموزش و ترویج کشاورزی،
3 مرکز تحقیقات کشاورزی و منابع طبیعی مازندران
4 دانشیار پژوهشی، موسسه تحقیقات جنگل‌ها و مراتع کشور
5 علوم مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The aim of the current research is to clarify effects of the coarse woody debris on the organic carbon variations in the substrate soil mineral layer based on amount of the nutrients (N, P and K) in the organic accumulations and mineral layer. Three forest sites so called Panomehsar, Kolanga and Tuskestan were selected for implementing the current study. Within each plot beneath the CWDs over than height of 1.5 m and dimensions of 7.5 cm, the organic accumulations resulted from the decay trend were sampled. Besides, the soils mineral layer up to 10 cm depth were sampled after removing the organic accumulations, and were transported to the laboratory. The results of PCA (Principle Component Analysis) showed that beneath the CWDs including higher organic accumulations, amount of the organic carbon and the nutrients were lower in the substrate soil mineral layer. Furthermore, the results of Spearman test indicated that amounts of organic carbon and nutrients in the organic and substrate mineral layers were independent from each other (P > 0.05), and amounts of the organic carbon with Nitrogen were only significantly correlated (P < 0.01). Also, the results of two-way PERMANOVA test indicated that interactions of form, species and decay of the CWDs in the study sites were not significantly effective on the organic carbon under the CWDs.
کلیدواژه‌ها [English]
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