| 摘要: |
| 将粉碎的苜蓿样装砂滤管埋入不同施肥处理的长期定位试验地，分期取出腐解物样品，并将其进行组分分离，测定燃烧热值，以探讨苜蓿样腐解过程中的能态变化特点及各组分对腐解过程中腐解物总热值的影响，结果表明：苜蓿样腐解过程中腐解物的能态变化可分为波动起伏（第1～7月）、急剧下降（第8，9月）和趋于平稳（第9月以后）3个阶段；纤维素、半纤维素及木质素类物质是影响腐解物热值的主要因素；腐解前期腐解物的能态与土壤肥力呈反相关。 |
| 关键词: 苜蓿，腐解物，有机质组分分离，能态，土壤肥力 |
| DOI： |
| 分类号:S551.706 |
| 基金项目:高等学校博士点基金资助项目 |
|
| The Energetic State of Decayed Substances in Decaying Process of Organic Residues（Alfalfa） |
|
Chen Sigen Zhang Yiping Bei Jinlin Zai Songmei Yang Famin
|
| Abstract: |
| The carborundum tubes filled with the ground alfalfa samples were burried into the long-term fixed position experimental plots with different fertilization treatments.The samples of decayed substances were taken out at regular intervals.And
then,the different components of the samples were isolated with the combustion heat
(Qv) determined so as to probe into the changing behaviors of energetic state and to determine the effeets of eaeh component on total combustion heat of decayed substances.
The results showed that the energetic changes of deecayed substances in the decaying
process of alfalfa samples might be divided into such three stages as the fluctuating and
rolling stage (Months l～7 after sample was burried)/the drastical reducing stage
(Months 8 and 9 after sample was burried)/the stage tending to be stable (after the 9 th
month).The substances including cellulose,hemicellulose and lignin were the dominate
faetor affecting Qv value.The negative correlation was found between the energetic state
of the decayed substances in the earlier decaying stage and soil fertility. |
| Key words: alfalfa, decayed substances, organic component isolation, energetic state,soil fertility |
