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随着沼气在农村广泛使用,沼气肥也越来越广泛地用于种植业。沼气是以人畜粪、杂草、秸秆等有机物为原料,经微生物活动而产生的。因而它不仅含有大量的氨态氮、速效磷、钾,还含有多种农作物所必需的微量元素,是一种理想的农家肥。在施用沼气肥时,应注意以下四点:一是宜作追肥。沼气肥是速效肥料,肥效期较短,作追肥效果好。二是注意深施。沼气肥中氨态氮含量高,易挥发而损失肥效。旱地宜穴施、条施,施后盖土。水田应在插秧前结合犁田施入犁沟,入土7—10厘米。如作追肥,施后应立即耘田。三是重视保肥。出池的沼气肥如不立即使用,必须加盖,并加入0.2—0.3％的过磷酸钙,使其形成比较稳定的磷酸铵。残渣和秸秆要堆沤后施用。四是用量不可过大。
As biogas is widely used in rural areas, biogas fertilizer is also increasingly used in crop production. Biogas is based on human and animal manure, weeds, straw and other organic matter as raw materials, resulting from microbial activity. So it not only contains a lot of ammonia nitrogen, available phosphorus, potassium, but also contains trace elements necessary for a variety of crops is an ideal manure. Biogas fertilizer in the application, should pay attention to the following four points: First, it is appropriate for top dressing. Biogas fertilizer is a quick-acting fertilizer with a short fertilizer effect and good effect of top dressing. Second, pay attention to deep application. Biogas fertilizer ammonia nitrogen content is high, volatile and loss of fertilizer. Dry areas should be applied, Article facilities, Shi cover after the soil. Paddy field should be combined with plow before transplanting into furrows, soil 7-10 cm. For top dressing, Shi Yun immediately after the application. Third, attention to fertilizer. Biogas fertilizer out of the pool, such as not immediately used, must be stamped, and add 0.2-0.3% of superphosphate, to form a more stable ammonium phosphate. Residues and stalks should be piled up for application. Fourth, the amount can not be too large.