2. Materials and methods
2.1. Study area and rice field plot experiment
The experiment was located in the midwest of the TLR, on the
northwest side of Taihu Lake, within 1 km of the shore (Fig. 1). This
location has a subtropical monsoon climate with an average temperature
of 15.7 ◦C and an annual rainfall of 1177 mm. The paddy
soil is classified as Gleyi–Stagnic Anthrosols, and originated from
a Lacustrine deposit as parent material. The soil consists of 8.30%
sand, 81.5% silt, and 10.2% clay by volume, and contains 15.4 g kg−1
organic C, 1.79 g kg−1 N, and 11.8 cmol kg−1 CEC. The pH (H2O) of
the soil (0–15 cm) was 5.6.