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生物质炭对烤烟干物质积累量及根际土壤理化性质的影响

DOI: 10.7668/hbnxb.2014.01.026, PP. 140-144

Keywords: 烤烟,生物质炭,根际土壤,理化性质,干物质积累

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Abstract:

为初步探讨生物质炭对烤烟生长及根际土壤理化性质的影响,通过盆栽试验,研究了在施用化肥的基础上添加不同量(70,140,210g/盆)生物质炭对烤烟干物质积累量及根际土壤酶活性、土壤有机质含量、土壤微生物量碳(SMBC)的影响。结果表明:施加生物质炭提高了烤烟生育中、后期干物质积累量,且添加140g/盆生物质炭处理效果最明显。在烤烟移栽后80d内,生物质炭抑制根际土壤转化酶活性,但这种抑制作用随着生育期的推进而逐渐减小,至移栽后80d,添加70g/盆生物质炭处理的土壤转化酶活性超过了同时期不添加生物质炭的处理;施加生物质炭可以提高烤烟生育后期过氧化氢酶活性,移栽80d后,土壤过氧化氢酶活性随着生物质炭添加量的增加而提高。土壤有机质含量随着生物质炭添加量的增加而显著提高;在烤烟生长后期,施加生物质炭对土壤微生物量碳具有提高作用,以140g/盆生物质炭处理效果最明显,70g/盆处理次之。因此,施加生物质炭可以显著提高烤烟全生育期根际土壤有机质含量,改善土壤质量(生长后期),促进烤烟生长,且以施加70,140g/盆生物质炭处理表现出的综合效果较好。

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