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以水稻秸秆为代表性秸秆,研究了腐秆剂对秸秆腐解性能的影响。对秸秆中施用腐秆剂后各项基本指标(腐解率,C/N)进行测定,探索了不同时间、腐秆剂用量、p H、温度、含水量和尿素用量对秸秆腐解的影响。对腐解前后的秸秆进行了红外光谱(IR)分析。结果表明,秸秆在腐解25 d后速率趋于平缓;腐解的适宜p H为7.0、温度为30℃、含水量为80%、尿素用量和腐秆剂用量均为秸秆质量的1%,此条件下腐解25 d,腐解率可达40.73%。对比腐解前后秸秆的红外谱图发现,腐解后的秸秆中纤维素、木质素和半纤维素等碳水化合物发生分解,使羟基和亚甲基基团减少,同时也表明酚类化合物被氧化成醌类物质;秸秆中的蛋白质和氨基酸分解后生成酰胺类化合物、硝酸盐和铵盐。
With straw as the representative straw, the effect of decayed straw on the decomposition performance of straw was studied. The basic indicators (decomposing rate, C / N) after application of rotsterin in straw were determined, and the effects of different dosage of rottender, p H, temperature, water content and urea on the decomposition of straw were explored . The stalks before and after decomposing were analyzed by infrared spectroscopy (IR). The results showed that the rate of stalks tended to be gentle after decomposing for 25 days. The optimum pH value for decomposing was 7.0, the temperature was 30 ℃, the water content was 80%, the amount of urea and the amount of rotting agent were 1% Decomposition 25 d under this condition, decomposition rate up to 40.73%. Comparing the infrared spectrum of straw before and after decomposing, the decomposition of carbohydrates, such as cellulose, lignin and hemicellulose, in the decomposed straw reduced the hydroxyl and methylene groups and also indicated that the phenolic compounds were oxidized Into quinones; straw protein and amino acid decomposition after the formation of amide compounds, nitrate and ammonium salt.