What are the soil types and nutrient status of rice in Sanming City

Our city is rich in land resources. The total land area of the whole city is 34.44 million mu, of which the cultivated area is 256.31 &127,000 mu, accounting for 7.4% of the total land area (of which the paddy field area is 244.19 million mu, accounting for 7.1% of the total land area, and the farmland area is 121,200 mu, accounting for 0.3% of the total land area). Paddy soil can be divided into four types due to its different distribution topography, such as ocean surface field, slope terrace, mountain ridge field and stream side field, with the proportion of 4.6:5:6.2:1. 127. The foreign-surface field is mainly cultivated paddy soil, including plaster field, gray sand field, black sand field, black mud field, etc.; the slope terrace is cultivated paddy soil, including yellow mud field, yellow mud field, gray yellow mud field and purple mud field; the mountain ridge field is mainly cultivated paddy soil, including deep and shallow mud field and green mud field.

1. Fertile paddy soil:

The area of paddy soil is 1,232,300 mu, accounting for 50.61% of the paddy soil area, which is the main paddy soil type in our city. Distributed in the counties of the river valley flat ocean fields, streams on both sides of the river fields, hills and valleys wide ridge fields.

During the formation of paddy soil, the waterlogged paddy soil is affected by both surface irrigation water and groundwater, and the waterlogged paddy soil undergoes a process of oxidation and reduction. According to the analysis of 128 soil samples, the average thickness of the cultivated layer of the fertile paddy soil is 214. 5 ± 1. 70cm (C. V 11. 72%),