摘要：本试验以江西典型旱地红壤为主要研究对象，分别设置生物质炭与氮肥这两个对土壤影响较大的因素，其中生物质炭7个水平，分别为0，2.5，5，10，20，30，40 t/ha，氮肥3个水平，分别为60，90，120 kg/ha。本试验研究了生物质炭与氮肥配施对旱地红壤土壤容重、铵态氮和硝态氮的影响、并探讨了长期施用生物质炭后对土壤中微生物量碳、氮和微生物碳氮比的影响。结果表明：生物质炭能够显著降低土壤容重，对土壤硝态氮、铵态氮的提高效果在较长时间内都表现良好，但是提高效果会随着生物质炭施用时间的延长而逐渐降低；生物质炭对土壤微生物性质的改善作用存在持续效应，土壤微生物量碳、氮均随生物质炭施用量的增加呈显著增加趋势，而土壤微生物量碳氮比呈显著降低的趋势。本次试验的研究结果为改善旱地红壤的不良理化性质以及大力推广生物质炭的使用提供了一定的科学依据。36611
毕业论文关键词：旱地红壤、生物质炭、微生物量碳、微生物量氮
The influence of biochar on soil microbial carbon and nitrogen Student majoring in Environmental Science
Abstract： The trail set two factors, which are the biochar and nitrogen, including seven biochar levels, 0, 2.5, 5, 10, 20, 30 and 40 t/ha, and three nitrogen levels, 60 , 90 and 120 kg/ha, with typical upland red soil in Jiangxi province as the study objective. It mainly studied the effects of the biochar and nitrogen fertilizer in upland red soil on the content of ammonium nitrogen, nitrate nitrogen and soil microbial nitrogen, as well as the effects on soil urease activity. The results showed that biomass charcoal can significantly reduce the soil bulk density, soil nitrate nitrogen and ammonium nitrogen enhancement effects over a longer period of time is good, but improve the effect with the extension of application of time gradually reduce; Biomass carbon have a lasting effect on the improvement of the soil microbial properties, soil microbial biomass carbon and nitrogen with the increase of applying biomass carbon content showed a trend of increase, microbial biomass carbon and nitrogen ratio showed a trend of decrease. This study provides certain scientific basis to improve bad upland red soil physical and chemical properties, crop production.
Key words: Upland red soil; biochar; microbial biomass carbon; microbial biomass nitrogen
目 录
摘要.1
关键词1
Abstract.1
Key words1
引言（或绪论）.2
1 材料与方法.2
1.1研究区概况.2
1.2供试材料2
1.3实验设计与设备管理.3
1. 4土壤样品的采集与分析.4
1.5技术路线 .5
1.6数据处理与统计分析5
2 结果与分析.5
2.1生物质炭对土壤容重的影响.5
2.2生物质炭对土壤养分性质的影响.6
2.2.1不同生物质炭施用量对旱地红壤硝态氮含量的影响6
2.2.2不同生物质炭施用量对旱地红壤铵态氮含量的影响.7
2.3施用生物质炭对土壤微生物量碳、氮和碳氮比的持续影响.8
3 讨论.11
3.1生物质炭对土壤理化性质的影响.11
3.2生物质炭对土壤养分性质的影响11
3.3生物质炭对土壤微生物量碳、氮和碳氮比的影响. 11
致谢 11
参考文献. 12
生物质炭对土壤微生物量碳、氮的影响引言
人们首次认识生物质炭是由于在巴西亚马逊流域发现了一种黑色的特殊土壤，这种土壤的有机质和pH均高于周边贫瘠的土壤，经过研究发现缘由就是其中的生物质炭。生物质炭孔隙度高、比表面积巨大、带负电荷多、芳香化程度高、且具有较高的稳定性和吸附性[1]。因此，生物质炭就成为增加土壤碳截留、改善土壤质量的有效材料，许多研究发现，长期施用生物质炭能够有效降低土壤容重、提高土壤孔隙度，还能有效提升土壤pH，增加土壤有机碳、有效磷和阳离子交换量[2-3]。 生物质炭对土壤微生物量碳氮的影响:http://www.youerw.com/shengwu/lunwen_35130.html