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以辽宁沈阳市郊某设施菜地土壤为研究对象,通过设置不同有机肥用量处理(0,20,60thm-2)的小区实验,系统研究不同有机肥处理对不同本底肥力设施菜地土壤全磷、速效磷含量变化的影响。研究结果表明,有机肥能够提高不同肥力设施菜地土壤0～20cm土层全磷含量,其中P1全磷含量与CK相比增加2.7～19.5%,P2增加7.6～33.6%。土壤0～20cm速效磷含量也随有机肥施用量的增加而明显增加,P2即有机肥施用量60thm-2时,不同肥力设施菜地土壤在黄瓜拉秧期速效磷含量与CK、P1之间均达显著差异(P<0.05)。本实验条件下,施用有机肥20thm-2,可保持施肥当季中肥力与高肥力设施菜地土壤磷素水平;当地常规有机肥施用量60thm-2可显著提高设施菜地土壤全磷与速效磷含量,从而加剧高肥力土壤磷素的累积,并对环境造成压力。
Taking the vegetable soil in a facility in the suburbs of Shenyang, Liaoning Province as the research object, different organic fertilizer treatments (0, 20 and 60thm-2) were used to study the effect of different organic fertilizer treatments on soil total phosphorus , The impact of changes in available phosphorus content. The results showed that organic manure could increase the total P content in 0-20 cm soil layer in vegetable soils with different fertility. The content of total phosphorus in P 1 increased 2.7 ~ 19.5% compared with CK, while that of P 2 increased 7.6 ~ 33.6%. Soil available 0 ~ 20cm available phosphorus content also increased significantly with the increase of organic manure application, P2 that organic fertilizer application 60thm-2, different fertility facilities vegetable soil in the cucumber pull seedling available phosphorus content and CK, P1 All reached significant difference (P <0.05). Under the experimental conditions, the application of organic manure 20thm-2, can maintain fertilizer fertilization and high fertility facilities vegetable soil phosphorus levels; the local conventional organic fertilizer application 60thm-2 can significantly improve the soil nutrients in vegetable fields and fast-acting Phosphorus content, thus exacerbating the accumulation of high-fertility of soil phosphorus, and the pressure on the environment.