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利用比较法对长期连续覆膜(17年)后土壤磷素的变化以及玉米吸收量的变化进行了研究。结果表明:经过17年的耕作,无论是施有机肥还是磷肥均能显著增加土壤中速效磷以及全磷的含量;覆膜栽培与裸地栽培比较结果,覆膜对于土壤中速效磷以及全磷含量的变化影响不大;对植株的籽粒、轴、叶片、茎的全磷进行了测定后显示:覆膜可以促进籽粒、轴、茎对磷的吸收,抑制了叶片对磷养分的吸收;从成熟期地上部分累积磷的总量来看,覆膜可以明显提高作物对磷的吸收。
The change of soil phosphorus and the change of maize uptake after long-term continuous filming (17 years) were studied by comparative method. The results showed that after 17 years of cultivation, the contents of available P and total P in soil were significantly increased both by organic manure and phosphate fertilizer. Compared with the bare land cultivation, The content of total phosphorus had no significant effect on the total phosphorus in the leaves, stems, leaves and stems of the plants. The results showed that the coating could promote the absorption of phosphorus by the grains, stems and stems and inhibit the absorption of phosphorus by the leaves. In the mature stage, the total amount of accumulated phosphorus in the aboveground part can obviously increase the absorption of phosphorus by crops.