EDTA and fulvic acid may increase available phosphate concentration in Jilin, Sichuan, Jiangxi paddy slurries, but can affect slightly on Guangdong paddy slurries.

• 添加EDTA和黄腐酸溶液可以显著增加吉林、四川和江西土壤中有效磷的含量，而对广东土的作用比较微弱。