引用本文:姜灿烂,何园球,刘晓利,陈平帮,王艳玲,李辉信.长期施用有机肥对旱地红壤团聚体结构与稳定性的影响[J].土壤学报,2010,47(4):715-722. DOI:10.11766/trxb200806160418
Jiang Canlan,He Yuanqiu,Liu Xiaoli,Chen Pingbang,Wang Yanling,Li Huixin.Effect of long-term application of organic manure on structure and stability of aggregate in upland red soil[J].Acta Pedologica Sinica,2010,47(4):715-722. DOI:10.11766/trxb200806160418
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长期施用有机肥对旱地红壤团聚体结构与稳定性的影响
姜灿烂1,2, 何园球2, 刘晓利2, 陈平帮1,2, 王艳玲3, 李辉信1
1.南京农业大学资源与环境科学学院;2.中国科学院南京土壤研究所;3.南京信息工程大学应用气象学院
摘要:
利用长期定位试验研究了红壤旱地团聚体结构及其稳定性。结果表明:与对照相比,各有机-无机配施处理均可不同程度地降低土壤容重并提高其孔隙度;增施有机肥后,土壤中大于5 mm 机械稳定性大团聚体增幅达2%~42%;各处理中大于0.25 mm 水稳性团聚体百分含量为:厩肥>稻草>绿肥>还田>对照。各有机肥处理中土壤中有机质、无定形氧化铁和无定形氧化铝含量较单施化肥处理分别增加了9%~54%、8.5%~21.7%和10.9%~26.8%。统计结果显示,>0.25 mm 水稳性团聚体含量与土壤有机质含量成极显著正相关(p<0.01);土壤团聚体破坏率与土壤有机质含量成极显著负相关(p<0.01)。在单施化肥的基础上有机肥的施入不仅有利于红壤旱地土壤大团聚体的形成,还有利于改善土壤团聚体结构及其稳定性。
关键词:  有机肥  旱地红壤  团聚体结构  团聚体稳定性
基金项目:国家自然科学基金项目(30971869)资助
Effect of long-term application of organic manure on structure and stability of aggregate in upland red soil
Jiang Canlan1,2, He Yuanqiu2, Liu Xiaoli2, Chen Pingbang1,2, Wang Yanling3, Li Huixin1
1.College of Resources and Environmental Sciences, Nanjing Agricultural University;2.Institute of Soil Science, Chinese Academy of Sciences;3.College of Applied Meteorology,Nanjing University of Information Science and Technology
Abstract:
Structure and stability of soil aggregates in upland red soil were studied in a long-term fertilization experiment. Results show that in treatments of mixed application of organic and inorganic fertilizers, bulk density of the soil decreased and porosity of the soil increased to some extent as was compared with that of blank treatment (CK).The percentage of mechanical-stable macroaggregates (>5 mm), increased by 2%〖KG-*3〗~42% as a result of application of organic manure.In terms of percentage of water-stable aggregates (>0.25 mm) the treatments followed a decreasing order of Stable manure>Rice straw>Green straw>incorporation of aerial parts>CKThe treatments of organic manure increased the contents of organic matter, amorphous Fe, and amorphous Al by 9%~54%, 8.5%~21.7% and 10.9%~26.8%, respectively over the treatments of application of chemical fertilizer alone.Statistic results show that the content of water-stable aggregates (> 0.25 mm) was significantly and positively correlated to content of organic matter (p<0.01), but soil aggregate destruction rate was significantly but negatively correlated to it (p<0.01). Application of organic manure in addition to inorganic fertilizer was not only favorable to formation of macro-aggregates in upland red soil, but also beneficial to improve structure and stability of the aggregates in the soil.
Key words:  Organic manure  Upland red soil  Structure of aggregate  Stability of aggregate