title: [Effects of different water and fertilizer supply on cucumber soil nutrient content, enzyme activity, and microbial diversity].
abstract: With cucumber (Cucumis sativus L.) variety Jinyou 1 as test material, a greenhouse experiment was conducted to study the effects of different water and fertilizer supply on the cucumber soil nutrient content, enzyme activity, and microbial diversity. Three water regimes (50%-60%, 70%-80%, and 90%-100% soil relative moisture content) and two fertilization practices (600 kg N x hm(-2) + 420 kg P2O5 x hm(-2) and 420 kg N x hm(-2) + 294 kg P2O5 x hm(-2)) were designed. The increase of water and fertilizer supply benefited the increase of soil available P content and sucrase activity. Increasing fertilization rate increased soil NH(4+)-N content but decreased soil protease activity, and increasing soil relative moisture content decreased the soil NH(4+)-N content and urease activity. Soil microbial diversity had no significant correlations with soil nutrient contents, but significantly positively correlated with soil urease activity and negatively correlated with soil sucrase activity. Among the treatments, the treatment 70%-80% soil relative moisture content + 600 kg N x hm(-2) and 420 kg P2O5 x hm(-2) had the highest soil nutrient contents, soil urease, sucrase, and phosphatase activities, and soil microbial diversity and evenness, being the best in soil potential productivity.
authors.affiliation: College of Resource and Environment, Northwest A & F University, Yangling 712100, Shaanxi, China. weizexiu_1@yahoo.cn
authors.forename: Ze-Xiu
authors.initials: ZX
authors.lastname: Wei
authors.forename: Yin-Li
authors.initials: YL
authors.lastname: Liang
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Inoue
authors.forename: Mao-Juan
authors.initials: MJ
authors.lastname: Zhou
authors.forename: Mao-Lin
authors.initials: ML
authors.lastname: Huang
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Gu
authors.forename: Yan
authors.initials: Y
authors.lastname: Wu
mesh_terms: D000383:Agriculture / Q000379:methods; D044822:Biodiversity; D018553:Cucumis sativus / Q000254:growth & development*; D005308:Fertilizers; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology; D013393:Sucrase / Q000378:metabolism; D014510:Urease / Q000378:metabolism; D014867:Water / Q000032:analysis*
chemical_list: D005308:Fertilizers; D012987:Soil; D014867:Water; D013393:Sucrase; D014510:Urease