Two Soil Compound Amendments: Improvement and Fertility Effect on Coastal Saline Soil

HAN Xiaofang;TIAN Xiaoming;YANG Yongli;ZHANG Jingzhi;ZHANG Qing;ZHANG Kai;ZHANG Tao;JIA Lin;Tianjin Taida Greening Group Company Limited;Teda Saline-alkaline Soil Greening Research Center;Shandong Siyuan Agricultural Development Co., Ltd.;

soil compound amendments;;coastal saline soil;;soil physical and chemical properties;;soil improvement;;soil fertility;;microbial agents

To study the improvement and fertility effects of two soil compound amendments(composed of microbial agents and decomposed garden wastes) on saline soil, this study used the 60-day indoor constant temperature(30℃) cultivation method to study the physical and chemical properties of saline-alkali soil with different treatments. The results showed that: decomposed garden wastes could improve the conductivity and soil alkalinity of saline-alkaline soil, while adding different concentrations of microbial agents on the basis of decomposed garden wastes had no significant effect on the conductivity and soil alkalinity of saline-alkaline soil, indicating that the two compound amendments had no significant effect on improving the conductivity and soil alkalinity of saline-alkali soil. Adding decomposed garden wastes and two compound amendments could increase the total nitrogen, alkali-hydrolyzed nitrogen, available phosphorus and organic matter content of saline-alkali soil, of which, A3 compound amendment had the largest increase range and the best effect.Adding decomposed garden wastes and two compound amendments all could reduce the available iron,available manganese and available copper content, and increase the available zinc content. Among them,compound amendment A had a significant effect, and A1 had the best effect. From the perspective of the number of soil bacteria, the two compound amendments could significantly increase the content of soil bacteria,and the content order was A3>B2>A2>B1>A1 and B3. The correlation analysis of soil indicators and bacteria content showed that bacterial content had a very significantly positive correlation with soil total nitrogen,available phosphorus and organic matter, and a significantly positive correlation with available potassium. In summary, the two compound amendments could significantly increase the nutrient indexes and bacterial content of saline soil, and could be applied to the improvement and remediation of saline soil, the compound modifier A3(LX3 and decomposed garden wastes) has the best effect.