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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。
Taking wetland soil and red soil in Yuhang as an example, three biogas slurry samples without biogas slurry and double application of soil profile were selected to study the effect of biogas slurry application on the distribution of phosphorus and phosphorus in soil and plant, Waste resources and rational use of fruits and vegetables to provide scientific basis for fertilization. The results showed that: (1) Application of biogas slurry could increase the total P content of the topsoil, but had little effect on the total P content of the deep soil; (2) After the biogas slurry was applied, the content of Fe-P in the soil increased significantly; (3) The content of total P in the stems and leaves of Chinese cabbage increased with the amount of biogas slurry applied, and the trend of the increase of the leaves was the most obvious.