Soil Management and Seasonal Community Structure of Soil Microarthropods in Semi-Arid Tropical Alfisols uri icon

abstract

  • Response of the soil microarthropod community was monitored across different soilmanagement treatments with annual and perennial crops in semi-arid tropical Alfisols.Annual crop management treatments included zero, shallow and deep tillage either bare,or with application of 15 t ha" farm-yard manure or 5 t ha" rice-straw. Perennial croptreatments were Stylosanthes hamala, Cenchrus ciliaris and pigeonpea either alone orin combination. Microarthropods, across all the treatments, included Collembola, Acarina,Araneae, Pseudoscorpiones, Pauropods, Symphyla, Diplura, Dermaptera. Psocoptera,Isoptera, Thysanoptera, Homoptera, Hymenoptera and Coleoptera adults and larvae. Thenumber of Collembola and Acarina together constituted > 62% of the totalmicroarthropods. The population densities of all microarthropods showed a more or lesssimilar pattern of temporal variations under all treatments. They were higher during therainy season of 1990 and 1991 in bare plots under zero-tillage treatment followed by plotsunder rice-straw treatment. However, densities during rainy months of 1989 were lowcompared to those of 1990 because of the high dose of carbofuran treatment. Populationdensities showed significant treatment differences during some months indicatingsignificant impact of soil management practices on microarthropod community structure

publication date

  • 1992