A large saline soil reserve has been explored in the Yellow River delta. Seasonal accumulation of salt in the surface
soil caused by high soil salinity and water shortage restricts
the germination of plants, while poor physical and chemical properties of soil are the major obstacles of plant growth.
Few categories and small amount of active substances like
soil enzyme and microorganisms are important influencing
factors of circulation of materials and plants’ sustainable utilization of soil resources (Angst and Sohi, 2012). The low
productivity of soil and soil environment deterioration in the
Yellow River delta further aggravate the soil salinity (Bai et
al., 2005; Wang et al., 2010), thus restricting the growth of
crops. Amendment with organic materials can improve the
soil salinity and increase crop yield significantly (Luo et al.,
2008)