将厌氧发酵残留物作为肥料还田是其资源化利用的有效途径,但国内外对其还田后氨气(NH3)和氧化亚氮(N2O)的排放特征及氮素利用率的报道较少。本研究通过微区试验,探讨了冬季和夏季大棚菜地追施猪粪沼液(DPS)后NH3和N2O的排放速...将厌氧发酵残留物作为肥料还田是其资源化利用的有效途径,但国内外对其还田后氨气(NH3)和氧化亚氮(N2O)的排放特征及氮素利用率的报道较少。本研究通过微区试验,探讨了冬季和夏季大棚菜地追施猪粪沼液(DPS)后NH3和N2O的排放速率及氮素损失率。结果发现, 追施DPS后菜地NH3挥发激增,通常发生在施肥后的48 h 内;而N2O排放量在第一次施肥后大幅增加,随后逐步趋于稳定。追施DPS的处理其NH3和N2O的排放量均显著高于施用化肥的处理,冬季和夏季二者的损失量分别占肥料总量的16.4%~23.2%和24.7%~27.5%。土壤温度、水分和pH对沼液中氮素以NH3和N2O的形式损失的影响较大。展开更多
In this paper, a novel polymeric complex [MnNa(Salicylate)2(CH3OH)(H2O)]n·0.5nH2O was obtained and characterized by IR spectra, elemental analysis and single crystal X-ray diffraction. The titled complex is...In this paper, a novel polymeric complex [MnNa(Salicylate)2(CH3OH)(H2O)]n·0.5nH2O was obtained and characterized by IR spectra, elemental analysis and single crystal X-ray diffraction. The titled complex is crystallized in triclinic system, space group P1 with a=0.763 82(15) nm, b= 1.037 1(2) nm, c=1.290 9(3) nm, α= 103.59(3)°, β=104.65(3)°, γ=109.50(3)°, V=0.873 6(3) nm 3, Z=2, Dc=1.556 Mg/m 3, Mr=409.20, μ=0.823 mm -1, F(000)=418, R=0.0614, wR= 0.147 6. The activity in catalyzing the superoxygen anionic free radical dismutation was determinated.展开更多
文摘将厌氧发酵残留物作为肥料还田是其资源化利用的有效途径,但国内外对其还田后氨气(NH3)和氧化亚氮(N2O)的排放特征及氮素利用率的报道较少。本研究通过微区试验,探讨了冬季和夏季大棚菜地追施猪粪沼液(DPS)后NH3和N2O的排放速率及氮素损失率。结果发现, 追施DPS后菜地NH3挥发激增,通常发生在施肥后的48 h 内;而N2O排放量在第一次施肥后大幅增加,随后逐步趋于稳定。追施DPS的处理其NH3和N2O的排放量均显著高于施用化肥的处理,冬季和夏季二者的损失量分别占肥料总量的16.4%~23.2%和24.7%~27.5%。土壤温度、水分和pH对沼液中氮素以NH3和N2O的形式损失的影响较大。
文摘In this paper, a novel polymeric complex [MnNa(Salicylate)2(CH3OH)(H2O)]n·0.5nH2O was obtained and characterized by IR spectra, elemental analysis and single crystal X-ray diffraction. The titled complex is crystallized in triclinic system, space group P1 with a=0.763 82(15) nm, b= 1.037 1(2) nm, c=1.290 9(3) nm, α= 103.59(3)°, β=104.65(3)°, γ=109.50(3)°, V=0.873 6(3) nm 3, Z=2, Dc=1.556 Mg/m 3, Mr=409.20, μ=0.823 mm -1, F(000)=418, R=0.0614, wR= 0.147 6. The activity in catalyzing the superoxygen anionic free radical dismutation was determinated.