The soil adopted was typical rice paddy soil in Shanghai region.

土壤用标准化处理的上海地区典型水稻土；

The plant effect of nutrients on paddy soil was not significantly.

调节养分对黄泥土中的生物学效应影响不明显。

A pot experiment was carried out to study the regularity of CH4 emission from paddy soil.

通过盆栽试验研究了水稻生长期CH 4排放的规律。

Humic acid was extracted from paddy soil, and was characterized by physical and chemical methods.

从土壤中提取腐殖酸样品，并用物理和化学等方法对其进行了表征。

This showed that citric acid inhibited the adsorption of cyromazine and melamine in the paddy soil.

这说明了柠檬酸对环丙氨嗪和三聚氰胺在水稻土中的吸附起着抑制作用。