Research and Experience of Rice Planting in Saline-sodic Soil in Northeast China

Saline-sodic soils widely distribute in the western part of Songnen Plain in Northeast China, and they are important land resources with degenerate and streesed soil environment. Carbonates (Na₂CO₃ & NaHCO₃) are the main salinity in saline-sodic soil with soil pH more than 8.5 in general, while the alkaline was strong and physical properties were poor, making it difficult for improving and utilizing saline-sodic soils. Planting rice has been one of the effective measures of biological improvement for saline-sodic soil in long-term production practice. The history and technology improvement for rice planting in saline-sodic soils was reviewed, the characteristics and research progress on rice tolerant to saline-sodic was described, and problems existed on planting rice were analyzed in this article. Some advices and development prospects were put forward for planting rice widely in saline-sodic soils as a theoretical supporting and technical reference.