土壤2017，Vol.49Issue(3)：543-549,7.DOI:10.13758/j.cnki.tr.2017.03.017
烟杆腐解速率及养分释放规律研究
Decomposition Rates and Nutrient Release Patterns of Tobacco Straw
摘要
Abstract
Decomposition rates and nutrient release patterns of tobacco straws were studied by nylon-bag experiment. Results showed that the decomposition rate of tobacco straw were fast at the beginning and then slowly decreased with the decomposing process. During the experiment (120 d), the cumulative decomposed rates of tobacco straw were 56%, 53% and 49% for the conventional method, dolomite powder and lime treatment, respectively. The release rates of the nutrients in tobacco straw followed an order of K>P>N in all of the treatments. Within 15 d of the treatment, the release rates of K and P were about 88% and 76%, respectively, however, only about 53% of N was released from tobacco straw. Tobacco straw returning had a significant effect on soil pH. Soil pH values with dolomite powder and lime treatment were significant higher than that of the conventional treatment. Tobacco straw returning significantly increased soil available K content by 47% compared with non-straw returning treatment. Based on the above results, K in tobacco straw was inferred as water extractable and available K, thus, it should be subtracted from the recommended fertilization rate for the rotate rice.关键词
烟杆还田/腐解速率/养分释放/稻田Key words
Tobacco straw returning/Decomposition rate/Nutrient release/Paddy field分类
农业科技引用本文复制引用
刘炎红,姜超强,沈嘉,李田,汪文杰,崔权仁,竟丽丽,祖朝龙..烟杆腐解速率及养分释放规律研究[J].土壤,2017,49(3):543-549,7.基金项目
安徽省烟草公司科技项目(20140551004)和安徽省农业科学院院长青年基金项目(14B0945)资助. （20140551004）
