【作者】 尹云锋；

【导师】 许景钢；

【作者基本信息】 东北农业大学 ， 土壤学， 2002， 硕士

【摘要】 本文通过土壤培养和框栽试验，探讨了硫磺与磷矿粉配合施用肥效方面的问题。并从“可持续发展”角度看待我国磷肥资源，在发展高效复合磷肥的同时，根据我国的磷矿资源和土壤条件，生产、推广一部分硫磺—磷矿粉混合肥直接施用，为农业生产提供更多的磷素资源。同时也可以减少环境污染，改善土壤生态条件，提高作物品质。结果如下： 硫磺与磷矿粉配合施用，不论在低硫还是高硫水平，硫磺的加入都有利于磷矿粉中难溶态磷向有效态磷转化。硫磺与磷矿粉配合施用能够明显地提高土壤速效磷含量，土壤pH也有了明显的降低。硫氧化细菌的加入对土壤速效磷、土壤pH、无机磷各组分含量、大豆产量、大豆蛋白质和大豆全磷量均有影响，但效果并不明显，而土壤磷素活化剂的加入，效果则比较明显，并且两者同时加入的效果更佳。 采用蒋柏藩、顾益初土壤无机磷分级法将黑土的无机磷分成六组，在四个取样时期土壤无机磷各组分均以Ca-P为主。在整个生育期内，土壤中无机磷各组分的变化为Ca2-P、Cas-P、AI-P和O-P呈降低趋势，Calo-P与Fe-P呈升高趋势。 黑土无机磷各组分中Ca2-P的有效性最高，是大豆可直接吸收利用的磷素营养，A1-P也可直接转化为有效磷，而Cas-P和Fe-P也是重要的有效磷源，可转化为Cae-P或A1-P而影响土壤有效磷，Ca₁₀-P和O-P则是潜在的磷源，主要转化为Ca₈-P而间接影响有效磷，但对有效磷的贡献较小。更多还原

【Abstract】 Soil culture experiment and frame experiment were carried out to study effects of application of elemental sulfur and phosphate rock. According to phosphate rocks resource and soil condition of China, from sustainable development and developing highly-effective complex fertilizer we were to produce and spread a part of mixed fertilizer on sulfur and phosphate rocks that were applied directly and supplied more phosphorus resource for agricultural production. Thus we might reduce environmental pollution and improve ecological condition of soil and crop quality. The results showed as follows:Whether low sulfur level or high sulfur level, the application of phosphate rock with sulfur could increase soil available P and decrease soil pH significantly. Applying S-oxidizing bacteria affected on soil available P, soil pH, the content of every fraction of inorganic phosphorus, soybean yield, soybean protein and total phosphorus of soybean, but affected insignificantly. Applying soil phosphorus activator affected on them significantly, and effects of application of S-oxidizing bacteria with soil phosphorus activator was the best.Jiang Baifan and Gu Yichu’s Fractionation of soil inorganic phosphorus was used to divide inorganic soil phosphorus of black soil into six parts. Among them, Ca-P was predominant in four growing periods. During the whole growing periods of soybean, the change of trends on fractions of soil inorganic P showed that Ca2-P, Cag-P, AI-P and O-P decreased, but Ca10-P and Fe-P increased.Ca2-P was the most available to soybean in black soil. Al-P was also transformed into available P directly, Cag-P and Fe-P were important and available phosphorus and influenced soil available P by transforming into Ca2-P and Al-P, Cai0-P and O-P was potential phosphorus source and influenced available P indirectly by transforming into Cag-P, but had little contribution to available P.Postgraduate: Yin Yunfeng Major: Soil Science Supervisor: Prof. Xu Jinggang更多还原