XDA28100503—Dataset of Nitrogen and Phosphorus Nutrients in Farmland of Irrigation Districts in the Sanjiang Plain, China (2022–2023)

This dataset focuses on the farmland ecosystem of the irrigation districts in the Sanjiang Plain, China, and systematically compiles monitoring data of nitrogen, phosphorus, and total carbon in various water types during the sowing period (April), growing period (July), and maturity period (September) from 2022 to 2023. The data cover farmlands in the Erdaohe, Youyi, Xingkaihu, and Baoquanling Farms, as well as adjacent local cultivated lands in the Sanjiang Plain, and include multiple water types such as irrigation water, farmland water, drainage water, and surface water.

The monitored parameters include total carbon (TC), total phosphorus (TP), reactive phosphorus (RP), total nitrogen (TN), ammonia nitrogen (NH3-N), nitrate, and nitrite. Basic information such as geographic coordinates (longitude, latitude), monitoring date, and sample number are also recorded for each sampling site. The data precision reaches three to four decimal places, accurately reflecting the characteristics of nutrient contents across different crop growth stages, regions, and water types.