Wang Linlin, Sun Xiangyang, Li Suyan, Zhang Tao, Zhang Wei, Zhai Penghui
College of Forestry, Beijing Forestry University, Beijing, China ; Forestry Research Institute of Hulun Buir, Hulun Buir, Inner Mongolia, China.
College of Forestry, Beijing Forestry University, Beijing, China.
PLoS One. 2014 Feb 18;9(2):e89185. doi: 10.1371/journal.pone.0089185. eCollection 2014.
The ability of the following four organic amendments to ameliorate saline soil in coastal northern China was investigated from April 2010 to October 2012 in a field experiment: green waste compost (GWC), sedge peat (SP), furfural residue (FR), and a mixture of GWC, SP and FR (1∶1∶1 by volume) (GSF). Compared to a non-amended control (CK), the amendments, which were applied at 4.5 kg organic matter m(-3), dramatically promoted plant growth; improved soil structure; increased the cation exchange capacity (CEC), organic carbon, and available nutrients; and reduced the salt content, electrical conductivity (EC), and exchangeable sodium percentage (ESP). At the end of the experiment in soil amended with GSF, bulk density, EC, and ESP had decreased by 11, 87, and 71%, respectively, and total porosity and organic carbon had increased by 25 and 96% respectively, relative to the CK. The GSF treatment resulted in a significantly lower Na(+)+K(+) content than the other treatments. CEC and the contents of available N, P, and K were significantly higher in the GSF-treated soil than in the CK and were the highest in all treatments. The FR treatment resulted in the lowest pH value and Ca(2+) concentration, which decreased by 8% and 39%, respectively, relative to the CK. Overall, the results indicate that a combination of green waste compost, sedge peat and furfural residue (GSF treatment) has substantial potential for ameliorating saline soils in the coastal areas of northern China, and it works better than each amendment alone. Utilization of GWC and FR can be an alternative organic amendment to substitute the nonrenewable SP in saline soil amelioration.
2010年4月至2012年10月，通过田间试验研究了以下四种有机改良剂对中国北方沿海盐碱土的改良能力：绿化废弃物堆肥（GWC）、莎草泥炭（SP）、糠醛渣（FR）以及GWC、SP和FR按体积比1∶1∶1混合而成的混合物（GSF）。与未改良的对照（CK）相比，以4.5 kg有机质/m³的用量施用这些改良剂，显著促进了植物生长；改善了土壤结构；提高了阳离子交换量（CEC）、有机碳和有效养分含量；降低了盐分含量、电导率（EC）和交换性钠百分比（ESP）。在试验结束时，与CK相比，用GSF改良的土壤容重、EC和ESP分别降低了11%、87%和71%，总孔隙度和有机碳分别增加了25%和96%。GSF处理的Na⁺+K⁺含量显著低于其他处理。GSF处理土壤的CEC以及有效氮、磷、钾含量显著高于CK，且在所有处理中最高。FR处理的pH值和Ca²⁺浓度最低，相对于CK分别降低了8%和39%。总体而言，结果表明绿化废弃物堆肥、莎草泥炭和糠醛渣的组合（GSF处理）在改良中国北方沿海盐碱土方面具有巨大潜力，且比单独使用每种改良剂效果更好。利用GWC和FR可作为替代不可再生SP的有机改良剂用于盐碱土改良。
