有机残体（苜蓿）腐解过程中腐解物能态的研究  

The Energetic State of Decayed Substances in Decaying Process of Organic ResiduesAlfalfa)

作　　者：陈思根[1] 张一平[1] 白锦鳞[1] 宰松梅 杨发民 

机构地区：[1]西北农业大学农化系

出　　处：《西北农业大学学报》1994年第2期11-15,共5页Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)

基　　金：高等学校博士点基金

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。The carborundum tubes filled with the ground alfalfa samples were bur-ried into the long- term fixed position experimental plots with different fertilization treat-ments. The samples of decayed substances were taken out at regular intervals. Andthen , the different components of the samples were isolated with the combustion heat(Q_v ) determined so as to probe into the changing behaviors of energetic state and to de-termine the effects of each component on total combustion heat of decayed substances.The results showed that the energetic changes of decayed substances in the decayingprocess of alfalfa samples might be divided into such three stages as the fluctuating androlling stage(Months 1～7 after sample was burried)/the drastical reducing stage(Months 8 and 9 after sample was burried)/the stage tending to be stable(after the 9thmonth). The substances including cellulose ,hemicellulose and lignin were the dominatefactor affecting Q_v value. The negative correlation was found between the energetic stateof the decayed substances in the earlier decaying stage and soil fertility.

关 键 词：苜蓿 腐解物 能态 土壤肥力 

分 类 号：S551.706[农业科学—作物学]