沼液施用对土壤与植物中磷分布的影响

以余杭青菜地潮土、红壤为例,选取未施加沼液、正常施加沼液以及加倍施加的土壤剖面各3条,研究沼液施加对土壤和植物磷(P)分布的影响,为畜禽废弃物资源化利用和瓜果合理施肥提供科学依据。结果表明:(1)沼液施加能够提高表层土壤的总P含量,而对深层土壤的总P含量影响不大;(2)沼液施加后,土壤中的Fe-P含量会有显著增加;(3)青菜茎和叶中的总P含量随沼液施加量的增加而增加,其中叶增加的趋势最明显。

Effect of Biogas Slurry Amendment on Phosphorus Distribution in Soil and Plant

Taking the fluvo-aquic soil and red soil in vegetable garden in Yuhang as an example,three soil profiles were selected from the unfertilized,normal fertilized and double fertilized plots respectively,in order to investigate the effect of biogas slurry amendment on phosphorus distribution in soils and vegetations.The results showed that application of biogas slurry increased the total P content in the top soils,but did not affect its content in subsoil.Application of biogas slurry significantly increased Fe-P content in the soil.Total P content in the stems and leaves of greengrocery increased with the amount of biogas slurry application.The increasing trend of total P content in the leaves of greengrocery was more obvious than that of other organs.