与化肥配施的菌肥用量对土壤肥力特性的影响

发布时间：2019-04-02 16:56

【摘要】：【目的】探寻适合与化肥配施的菌肥用量,以期指导广东省南雄烟区大田烟草施肥。【方法】利用已分离的有益微生物菌株(包括具固氮解磷功能的固氮菌属Azotobacter sp.菌株x34、具解钾功能的芽孢杆菌属Bacillus sp.菌株jb21、属于光合细菌的胶状红长命菌Rubrivivax gelatinosus菌株sbg11)与有机物发酵配制而成的菌肥,通过烟草大田试验,以不同施用量的菌肥为处理,即CK(清水对照)、T1(化肥)、T2(低用量的菌肥+化肥)、T3(中用量的菌肥+化肥)、T4(高用量的菌肥+化肥),每株按照基肥∶追肥=1∶1的比例施肥。低、中、高用量菌肥分别按照每株基肥10、20、40 g的量施用,所有处理的氮、磷、钾施入总量相等,研究不同用量的菌肥对土壤肥力和土壤微生物的影响。【结果】大田条件下,菌肥+化肥处理能有效提高土壤中有机质含量,显著提高土壤中碱解氮、速效磷和速效钾的含量,增强土壤基础呼吸强度,有效提高土壤中细菌和放线菌数量,降低真菌数量。【结论】中用量菌肥(T3,即每株烟草基肥和追肥分别施用20 g菌肥)增强土壤肥力的效果更明显,可作为该菌肥的推荐用量。
[Abstract]:[objective] to explore the amount of bacterial fertilizer suitable for chemical fertilizer application in tobacco fields in Nanxiong tobacco area of Guangdong Province. [methods] to utilize the isolated strains of beneficial microorganisms, including nitrofixing bacteria (Azotobacter sp.) with nitrogen-fixing phosphorus-fixing function, in the field of tobacco fertilizer application in Nanxiong tobacco area of Guangdong Province. Strain x34, Bacillus sp. with potassium-decomposing function Strain jb21, belongs to Rubrivivax gelatinosus strain sbg11, which belongs to photosynthetic bacteria, and the bacterial fertilizer produced by fermentation with organic matter was treated with different amounts of bacterial fertilizer, i.e., CK (water control), T1 (chemical fertilizer), through tobacco field test. T2 (low-dosage bacterial fertilizer), T3 (medium-dosage bacterial fertilizer), T4 (high-dosage bacterial fertilizer), each plant according to base fertilizer: topdressing = 1:1. The effects of different amounts of bacterial fertilizer on soil fertility and soil microorganism were studied under the conditions of 10 g, 20 g, 40 g per plant, respectively. The total amount of nitrogen, phosphorus and potassium applied to all treatments was equal, and the effects of different amounts of bacterial fertilizer on soil fertility and soil microorganisms were studied. [results] under the field conditions, the soil fertility and soil microorganism were affected by different amounts of bacterial fertilizer. Bacterial fertilizer treatment can effectively increase the content of organic matter in soil, increase the contents of alkaline hydrolyzed nitrogen, available phosphorus and available potassium in soil, enhance the soil basic respiration intensity, and effectively increase the number of bacteria and actinomycetes in soil. [conclusion] the effect of applying bacterial fertilizer (T _ 3, 20 g per plant) to enhance soil fertility is more obvious, which can be used as the recommended amount of bacterial fertilizer. [conclusion] the application of bacterial fertilizer (T _ 3, 20 g per plant) can improve soil fertility more obviously.
【作者单位】：华南农业大学资源环境学院;华南农业大学农学院;
【基金】：国家自然科学基金(31370052) 广东省自然科学基金(2014A030313459) 广东省烟草专卖局项目(粤烟科[2012]26号,粤烟科201402)
【分类号】：S158

【相似文献】