泥炭植物残体分解速率的研究

On the Decomposition Speed of Plant Residue of Peat

研究了实验室条件和野外条件下泥炭植物残体的分解速率，探讨了植物残体分解过程中主要的影响因素．结果表明，在水分50％，温度为30℃，弱碱性的实验条件下，泥炭植物残体分解得最快；不同的植物残体分解速度不同，灰藓分解得最快，其次是芦苇、针叶松、赤杨和棉花莎草，泥炭藓残体分解得最慢．野外条件下植物残体的分解速率较实验条件慢，藓类植物的分解速率，野外较室内低30％～60％，其它植物低60％～14％．

The decomopition speeds of plant residue of peat in the laboatory and in field arestudied, and the main factors that effect the decompeition speed are discussed in this paper.The results show that, it is the fastest to decommpose plant residue of peat under the conditions that moisture is 50%, temperature is 30 t and solution is tiny alkaline in the laberatory; the decomopition speed is different for different plant residue of peat, Hypnum patientiae decomopes fastest, Phragmites communis, Pinus, Alnus japonica and Eriophorumfaurici are the second. Sphagnum decomoposes slowest. The decomposition speed of plantresidue is slowr in field than in the laboratory, it decreases by 30% ~ 60% for sphagnumplant residue, and by 6% ~ 14 % for the other plant residue.