摘要
利用盆栽试验方法,研究了几种肥料配比和调理剂施用对侵蚀红壤的培肥效应。结果表明:土壤调理剂2号的施用与施用NPK化肥相比可以提高旱地红壤的有效磷含量,减轻因施用化肥带来的土壤酸化,提高大豆和油菜对肥料磷、钾的利用率,增加作物生物量,且对土壤好气性细菌、真菌和硝化细菌数量具有明显的促进作用。施用有机肥可以较快地提高土壤速效钾和有机质含量,与施用化肥相比显著提高了大豆和油菜对肥料氮、磷、钾的利用率,施用有机肥或土壤调理剂2号的施肥措施是提高红壤旱地肥力的较好的施肥方法。因豆科植物具有根瘤菌共生固氮作用,大豆种植生物量大,肥料利用率高,选取大豆作为先锋物种,可较好地提高侵蚀红壤的修复效应。
Effect of 6 fertilization systems in restoring the eroded red soil caused by soil erosion, which is a severely eroded red soil derived from Quaternary Red Clay, were studied with a pot experiment. The results showed that applying soil ameliorant Ⅱ could increase content of available P compared with appling chemical fertilizer, and also it could alleviate soil acidification and promote the use efficiency of soybean and rape for fertilizer P and K. Applying organic fertilizer can increase the content of available K and organic material, while it also promote the use efficiency of soybean and rape for fertilizer N, P and K, and increase the bio- mass compared with applying chemical fertilizer. Because of the symbiotic nitrogen fixation function of rhizobium on leguminous, the biomass and nutrient use efficiencies of soybean is larger, it also could enhance the restoring effect of eroded red soil by selecting the soybean as the pioneer crop.
出处
《水土保持学报》
CSCD
北大核心
2009年第4期152-156,共5页
Journal of Soil and Water Conservation
基金
国家"863计划"项目(2006AA10Z419)
关键词
侵蚀红壤
施肥技术
修复效应
eroded red soil
fertilization
restoration effect
