title: Differential responses of soil nematode community to pig manure application levels in Ferric Acrisols.
abstract: Excessive pig manure application probably degrades arable soil quality in some intensive pig farming areas. The responses of the nematode community to dosages of pig manure were investigated in Ferric Acrisols under 3-season peanut monoculture. Varying dosages of manure (1.75, 3.5, 7, 14 and 28 t·ha-1·yr-1) in combination with chemical fertilizer were applied to field plots, and chemical fertilizer alone was also applied as a control. With increasing manure application, the abundance of bacterivores and omnivores-predators increased, the abundance of plant parasites decreased, and fungivores abundance exhibited hump-shaped variation. Simpson diversity index and plant parasite index/maturity index of the nematode communities increased to a maximum level at a manure application rate of 3.5 t·ha-1·yr-1and then sharply decreased. The changes in the soil nematode community were further determined to be correlated with chemical properties; available phosphorus had the strongest quadratic correlation with the two indices, implying that available phosphorus had a better indicative effect than other soil properties to nematode community. Available phosphorus in soil was deduced from 49 to 64 mg·kg-1with the best nematode communities. Our results emphasized the importance of regular applications of manure in agriculture field to balance nematode diversity and build healthy agro-ecosystems.
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.|University of the Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Yi-Ru
authors.initials: YR
authors.lastname: Yang
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
authors.forename: Xiao-Gang
authors.initials: XG
authors.lastname: Li
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
authors.forename: Zhi-Gao
authors.initials: ZG
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
authors.forename: Tao-Lin
authors.initials: TL
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.|Ecological Experimental Station of Red Soil, Chinese Academy of Sciences, Yingtan, 335211, China.
authors.forename: Xing-Xiang
authors.initials: XX
authors.lastname: Wang
mesh_terms: D000138:Acidosis / Q000378:metabolism*; D000383:Agriculture; D000818:Animals; D018556:Crops, Agricultural; D017753:Ecosystem; D004784:Environmental Monitoring; D005308:Fertilizers; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D008372:Manure; D015999:Multivariate Analysis; D009348:Nematoda / Q000502:physiology*; D010758:Phosphorus / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D013552:Swine
chemical_list: D005308:Fertilizers; D008372:Manure; D012987:Soil; D010758:Phosphorus; D007501:Iron