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- W3151219968 abstract "The study was conducted in Huantial County Sahgdog Province in North China to study the secondary succession of earthworm population under low and high soil fertility in agro-ecosystem. The results showe sthat seven specis were found both in two agro-ecosystems, but the earthworm population density and conmposition are different. The avergae earthworm population in the high fermtility soil is relatively abundance. The population density is 83.83in./m~(2). Amongt the seven derthworm species. Aporrectae treapezoids is th dominant speceis. While in the low fertiliity soil, the populaiton density is 40.18 ind./m~(2) and Drawida gisti is the dominatn speces. Comparing the density of each earthworm speceeis in the two kins of sol fertility agroecosytems. tthe density of aporrrecate treapezoids and Amynthas hupeiensis is signifcantly higher in the high fertility soil sthan that in the low fertility soil, while the differnce of other five species is not obviours, This results hsowed that wilth the sucesseion of the siol fertility, the earthwo5m also has a pocess of succession; the abundance species in the low fertility agro-eccosytstems, the density of Aporrectae trapezoids and Amynthas huperientsis is sgnifcantly higher in the high fertility soil than that tin the low fertility soil, while the idffernce of other five species is not obivorus. This results showes that with the succession of the soil fertility, the earthworm also has a proces sof succession; the abundance speceis in the low fertility agro-ecosytem Drawida gisti is gradually sustituted by Aporrecta traperzoid in the high fertility agro-ecosystem. One=year expermient was also conducted to study the impact of the orgain input on eathworm population and succession. The results showes that with the increase of the orgain iput, the earhworm population density is increasing, the earthworm density of the treatetn has following ascending trend: Chemical fertilizer< Chemical fertilizer+Wheat Straw<Chemical Ferilizr+ Wheat Straw+ Corn Strw<Cemical Ferilizer+ Wheat Straw+ Corn Staw+ Organic Fertilizer, the law was shown both in the low and high fertility agro-ecsosttem te orgainc input is critiocal to increas the soil organism acity and soil fertility. However the differnt of the earthworm population composition was not showen due to tooshrot experimetn prerod, succession of soil ferility and eathorm is the long=term adaptation of goraismm and environment." @default.
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- W3151219968 date "2004-01-01" @default.
- W3151219968 modified "2023-09-27" @default.
- W3151219968 title "Secondary sucesssion of earthworm population in high production agrosecosystem in North China" @default.
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