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首页> 外文期刊>Journal of plant nutrition and soil science >Effect of triple superphosphate and biowaste compost on mycorrhizal colonization and enzymatic P mobilization under maize in a long-term field experiment
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Effect of triple superphosphate and biowaste compost on mycorrhizal colonization and enzymatic P mobilization under maize in a long-term field experiment

机译：三重磷酸盐和生物流堆肥对长远实验中玉米菌根殖民化和酶P动员的影响

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Phosphorus (P) fertilizers and mycorrhiza formation can both significantly improve the P supply of plants, but P fertilizers might inhibit mycorrhiza formation and change the microbial P cycling. To test the dimension and consequences of P fertilizer impacts under maize (Zea mays L.), three fertilizer treatments (1) triple superphosphate (TSP, 21-30 kg P ha(-1) annually), biowaste compost (ORG, 30 Mg ha(-1) wet weight every third year) and a combination of both (OMI) were compared to a non-P-fertilized control (C) in 2015 and 2016. The test site was a long-term field experiment on a Stagnic Cambisol in Rostock (NE Germany). Soil microbial biomass P (P-mic) and soil enzyme activities involved in P mobilization (phosphatases and ss-glucosidase), plant-available P content (double lactate-extract; P-DL), mycorrhizal colonization, shoot biomass, and shoot P concentrations were determined. P deficiency led to decreased P immobilization in microbial biomass, but the maize growth was not affected. TSP application alone promoted the P uptake by the microbial biomass but reduced the mycorrhizal colonization of maize compared to the control by more than one third. Biowaste compost increased soil enzyme activities in the P cycling, increased P-mic and slightly decreased the mycorrhizal colonization of maize. Addition of TSP to biowaste compost increased the content of P-DL in soil to the level of optimal plant supply. Single TSP supply decreased the ratio of P-DL:P-mic to 1:1 from about 4:1 in the control. Decreased plant-benefits from mycorrhizal symbiosis were assumed from decreased mycorrhizal colonization of maize with TSP supply. The undesirable side effects of TSP supply on the microbial P cycling can be alleviated by the use of compost. Thus, it can be concluded that the plant-availability of P from soil amendments is controlled by the amendment-specific microbial P cycling and, likely, P transfer to plants.
机译：磷（P）肥料和菌根形成都可以显着改善P植物的P供应，但P肥料可能抑制菌根形成并改变微生物P循环。为了测试玉米（​​Zea mays L.）下P肥料影响的维度和后果，三种肥料处理（1）三重过磷酸（TSP，每年进行21-30kg P ha（-1），Biowasty堆肥（Org，30毫克） HA（-1）每三年湿重量）和（OMI）的组合与2015年和2016年的非P-受精管制（C）进行比较。测试部位是一个长期的实验Cambisol在罗斯托克（德国）。土壤微生物生物量P（p-MIC）和参与P动员（磷酸酶和SS-葡糖苷酶）的土壤酶活性，植物可用的P含量（双乳酸提取物; P-DL），腐蚀性殖民化，射击生物量，拍摄P.确定浓度。 P缺乏导致微生物生物量下的P固定性降低，但玉米生长不受影响。单独的TSP应用通过微生物生物量促进p吸收，但与对照相比，玉米的菌根殖民定子减少了超过三分之一。 Biowasty Concost在P循环中增加了土壤酶活性，增加了P-MIC，略微降低了玉米的菌根殖民。添加TSP以Biowasty ConcoSt增加了土壤中P-DL的含量，以最佳植物供应水平。单TSP电源降低了对照中约4：1的P-DL：P-MIC的比率为1：1。菌根共生的植物益处减少，玉米菌丝具有TSP供应的菌根殖民化减少。通过堆肥的使用可以缓解TSP电源对微生物P循环的不希望的副作用。因此，可以得出结论，来自土壤修正的P的植物可用性由修正特异性微生物P循环控制，并且可能是P转移到植物。

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