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在不同施肥模式下对氮的淋出进行模拟试验,结果表明:微生物肥料的配合施用对缓释型有机无机复合肥有活化作用,15d使缓释型有机无机复合肥的氮释放量比未施用微生物菌肥处理的增加17.6%,该释放量虽然仅相当于同期等量尿素氮溶出量的一半,但其溶出速率变化较平稳,即能给小麦的整个生育期提供平稳的养分。小麦栽培试验结果表明,配合施用微生物菌肥与缓释型复合肥,小麦的干物质重、叶面积和籽粒总产量均最高;在小麦拔节期,该处理使土壤中释放的铵态氮(NH)和硝态氮(NO)量明显多于其他处理,并提高小麦吸收利用的氮量。这些结果说明,微生物菌肥对缓释型复合肥有活化作用,促进小麦对氮的吸收和利用。单施菌肥的处理补给土壤的养分微乎其微,而小麦吸氮量(NU)却高于单施缓释型复合肥和单施化肥的两处理,说明菌肥也可能活化土壤中的氮并促进小麦营养生长和对土壤氮的吸收利用。
In different fertilization modes of nitrogen leaching simulation test results showed that: the combination of microbial fertilizer with slow-release organic-inorganic compound fertilizer activation, 15d so that the slow release organic-inorganic compound fertilizer nitrogen release than not Microbial fertilizer treatment increased by 17.6%, although the release amount is equivalent to only half of the same amount of urea nitrogen leaching amount over the same period, but the dissolution rate changes more stable, that is, can provide steady nutrients throughout the growing period of wheat. The results of wheat cultivation showed that the combination of microbial fertilizer and slow-release compound fertilizer had the highest dry matter weight, leaf area and total grain yield. During the jointing stage of wheat, the release of ammonium nitrogen ) And nitrate nitrogen (NO) were significantly higher than other treatments, and increased the nitrogen uptake and utilization of wheat. These results show that microbial fertilizer on the slow-release compound fertilizer activation, promote wheat nitrogen absorption and utilization. Fertilizers supplied only a negligible amount of nutrients in the soil, while N uptake of wheat was higher than those treated with the compound fertilizers and chemical fertilizers, indicating that the fertilizers may also activate nitrogen in the soil and promote Wheat vegetative growth and soil nitrogen uptake and utilization.