So water-retaining agents could mix urea and low concentration potassium in process of production, and we can study complex water-retaining agents which compose the nitrogen and potassium too.

因此，在生产过程中可以考虑保水剂与尿素和低浓度的钾肥混合施用，也可以进行赋氮肥、钾肥的复合型保水剂研究。

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So water-retaining agents could mix urea and low concentration potassium in process of production, and we can study complex water-retaining agents which compose the nitrogen and potassium too.

因此，在生产过程中可以考虑保水剂与尿素和低浓度的钾肥混合施用，也可以进行赋氮肥、钾肥的复合型保水剂研究。

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