论文部分内容阅读
M.M.KOHOHOBa指出,在研究进入土壤中的植物残体及其腐殖化有关的许多问题中,不应忘记具有理论和实践意义的腐殖质形成过程的能量问题。虽然一些学者在这方面进行了研究,但对于腐殖化过程中的能量变化现象,还存在一些不同意见。本文采用恒容燃烧热作为表征不同腐解时期腐解物能态的指标,着重从能态角度研究了植物残体腐解过程中的动态变化规律和特点。1 供试材料与测试方法 在粉碎并通过1mm筛孔的玉米秸秆样品中拌入尿素(其中Ⅰ期试验重复1,各处理未加尿素)。将样品装入砂滤管,埋入试验地(红油土)两个重复(1,2)的不同施肥处理小区(表1)中。定期取各小区砂滤管中的混合样品作为供试材料。试验分两期进行,Ⅰ期为1982年10月～1984年5月;Ⅱ期为1983年10月～1984年6月。
M. M. KOHOHOBa pointed out that in studying many of the problems associated with plant residues entering the soil and their humification, one should not forget the energy problems of the humus formation, both theoretical and practical. Although some scholars have conducted research in this respect, there are still some disagreements about the phenomenon of energy change during the humification. In this paper, the constant volume heat of combustion was used as an indicator to characterize the energy state of the decomposed matter during different decomposing periods, and the dynamics and characteristics of decomposed plant residues during the decomposing period were emphatically studied. 1 Materials and Methods of Test Urea was added to corn stalk samples pulverized and passed through a 1-mm sieve (where Phase I was repeated 1 and no urea was added to each treatment). The samples were placed in a sand filter tube and embedded in two plots (1, 2) of different fertilizer treatment plots (Table 1) in the test site (red soil). Periodically take the sand filter sand mixed samples as the test material. The trial was conducted in two phases. Stage I was from October 1982 to May 1984; stage II was from October 1983 to June 1984.