不同耕作方式对稻田土壤动物、微生物及酶活性的影响研究

摘要/Abstract

摘要： 以长期定位试验为基本材料,研究了不同耕作方式对土壤动物、微生物及酶活性的影响.结果表明,0～20 cm土壤层内大、中、小型土壤动物垄作免耕为14700个·m^-22,冬水免耕为10 450个·m^-22,水旱轮作为7 950个·m^-22,常规平作为6 275个·m^-22,垄作免耕处理土壤动物的数量是常规平作的2.34倍.土壤微生物数量和土壤微生物生物量氮因季节而异,总体上是春秋多而夏季少.土壤酶活性表现出表层高,底层低.土壤微生物数量、土壤微生物生物量氮及土壤酶活性不同处理间仍是垄作免耕>水旱轮作>冬水免耕>常规平作,表明垄作免耕有利于改善稻田土壤生态环境,有利于土壤肥力的提高.

关键词: 耕作方式, 稻田, 垄作免耕, 土壤动物, 土壤微生物, 土壤酶活性

Abstract: A long-term experiment showed that under ridge-no-tillage,the amount of soil animal in 0～20 cm layer was 14 700 ind.·m^-2,while under no-tillage and fallow in winter,paddy-upland rotation,and conventional tillage,it was 10 450,7 950 and 6 275 ind.·m^-2,respectively.Soil microbial biomass and microbial biomass N were more in spring and autumn,and less in summer.Soil enzyme activity was higher in surface soil layer and lower in bottom soil layer.The amount of soil animal,microbial biomass and microbial biomass N and soil enzyme activity was in order of ridge-no-tillage>paddy-upland rotation>no-tillage and fallow in winter>conventional tillage.The results also indicated that ridge-no-tillage was advantageous to improve soil ecological environment and soil fertility in paddy field.

Key words: Tillage system, Paddy field, Ridge-no-tillage, Soil animal, Soil microorganism, Soil enzyme activity

中图分类号:

S714

高明, 周保同, 魏朝富, 谢德体, 张磊. 不同耕作方式对稻田土壤动物、微生物及酶活性的影响研究[J]. 应用生态学报, 2004, (7): 1177-1181.

GAO Ming, ZHOU Baotong, WEI Chaofu, XIE Deti, ZHANG Lei. Effect of tillage system on soil animal,microorganism and enzyme activity in paddy field[J]. Chinese Journal of Applied Ecology, 2004, (7): 1177-1181.

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