山东省主要土类的有机磷及其与磷酸化酶和解磷微生物的相关性研究

Study on Organic Phosphorus and its Correlation with Soil Phosphoratase and Phosphorus-solubilizing Microbe in the Main Soils of Shandong Province

山东省三大土类的有机磷含量平均为61.59mg kg-1,约占全磷含量的12.37%,其中潮土的有机磷含量极显著高于褐土和棕壤。三大土类土壤不同活性有机磷中,以中稳性活性有机磷(MLOP)为主,平均占有机磷总量的76.37%,3大土类间MLOP、HROP差异极显著,MROP、LOP差异显著;4种不同活性有机磷以活性有机磷(LOP)的有效性最高,是反映土壤磷素有效性的主要指标之一,与土壤肥力密切相关。通过3大土类两个产量水平的有机磷与解磷微生物的数量、强度和各种酶的活性的相关性分析,探讨了土壤有机磷通过土壤微生物和磷酸化酶的生物活性进行转化的机制,为3大土类和两个产量水平的土壤培肥提供了理论依据。

The average percentage of organic P in the 3 main soil types of Shandong province was 61.59mg kg^-1, 12.37% of the total P. The amount of organic P in cultivated meadow was higher than that of in brown soil and cinnamon soil . MLOP was the main form of different organic P . Among the 3 main soil types , MROP, LOP were significant different with eachother. The activity of LOP was the highest in the 4 types of P, and that can be used for one of indication of the soil fertility. The mechanism of transformation organic P to available P depending on phosphorus - solubilizing microbe and phosphoratase activity was discoveredso, this study can provide guidance for how to improve the soil fertile status.