Abstract:

In order to solve soil salinization problem of Yellow River irrigation area of Ningxia, improve saline soil quality, and increase land productivity, the author studied the effect of BGA soil conditioner on oil sunflower growth and saline soil property, and evaluated the application effect of BGA soil conditioner through field plot experiment. The results showed that BGA soil conditioner improved physical and chemical properties of saline soil. The soil bulk density decreased while the total porosity increased, and the contents of available nitrogen and available phosphorus in soil were increased compared with CK1. The content of soil available phosphorus was also increased compared with CK2. BGA soil conditioner also promoted growth of oil sunflower. Plant height, leaf SPAD value, and photosynthetic rate of oil sunflower were improved. The yield of oil sunflower was higher 176.7% than that in CK1 and 18.0% than that in CK2. It was feasible to use BGA soil conditioner to improve saline soil if its production cost was reduced or it was combined with chemical fertilizers, and it was valuable to further research and develop BGA soil conditioner.