腐殖酸对滨海盐土土壤性质及水稻产量的影响

Effects of Humic Acid on Soil Properties and Rice Yield in Coastal Saline Soil

在滨海盐土中,通过在水稻上开展腐殖酸5个施用量田间试验,研究腐殖酸对土壤理化性质及水稻产量的影响,明确腐殖酸对滨海盐土改良机理和效应,以期为滨海盐土的治理提供理论依据和技术支撑。结果表明,施用腐殖酸不仅显著降低了滨海盐土的土壤pH值、盐分含量,还能显著增加土壤团聚体含量、饱和含水量和有机质含量,改善土壤肥力,从而提高稻谷产量。当腐殖酸施用量为1200kg·hm^(-2)时,滨海盐土的土壤降盐、降碱和稻谷增产等效果是最好的。因此,腐殖酸在滨海盐土改良上效果较好,具有广阔的应用前景。

In order to clarify the effect of humic acid on coastal saline soil and rice yield and provide theoretical basis and technical support for coastal saline soil treatment,a field experiment of rice was carried out with five application rates of humic acid in the coastal saline soil.The experiment results showed that humic acid application not only significantly reduced the pH value and salt content of coastal saline soil,but also significantly increased soil aggregate content,saturated water content and organic matter content and rice yield.The effect of salt and alkali reduction and rice yield increase in coastal saline soil was the best when the dosage of humic acid was 1200 kg·hm^(-2).Therefore,humic acid has a good effect on the improvement of coastal saline soil and a broad application prospect.