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通过大豆盆栽试验,研究几种肥料配比和调理剂施用对不同母质发育的侵蚀红壤的培肥效应.结果表明,1)与施用NPK化肥相比,土壤调理剂2号的施用可以提高旱地红壤的有效磷和有机质含量,减轻因施用化肥带来的土壤酸化,提高大豆对肥料氮、钾的利用率,增加作物生物量,提高土壤微生物数量;施用有机肥可以较快地提高土壤速效氮、磷、钾和有机质含量,显著提高大豆对肥料氮、磷、钾的利用率和土壤微生物活度,施用有机肥或土壤调理剂是提高红壤旱地肥力较好的技术措施.2)3种母质发育的红壤相比较,第四纪红土红壤速效养分较高,板岩发育的红壤植物氮磷肥利用率较高,而花岗岩发育的红壤植物钾肥利用率较低,应重视板岩发育红壤和花岗岩发育红壤的钾素资源补充.
The results showed that: 1) Compared with the application of NPK fertilizers, the application of soil conditioner No. 2 could improve the fertility of red soil in upland red soil Of available phosphorus and organic matter content, reduce soil acidification caused by the application of chemical fertilizers, increase nitrogen and potassium utilization of soybean, increase crop biomass and increase the amount of soil microorganisms; application of organic fertilizer can quickly increase soil available nitrogen, Phosphorus, Potassium and organic matter content significantly increased the nitrogen, phosphorus and potassium utilization rate and soil microbial activity of soybean, and the application of organic fertilizer or soil conditioner was the better technical measure to improve the fertility of red soil dryland.2) Compared with red soil in Quaternary, the quick-available nutrients of lateritic red soil were higher, the utilization rate of nitrogen and phosphorus was higher in red soil of slate development, while that of red soil in granite was lower, so red soil of developing slate and red soil of granite should be emphasized Potassium supplement.