腐植酸液肥在优质稻上的应用效果研究
Hunan Agricultural Sciences(2015)
Abstract
以高档优质籼稻农香18、湘晚籼17号、创香5号为材料,在大田条件下研究了纽翠绿腐植酸液肥不同类型及配比对农香18产量、稻米镉含量和硒含量的影响,以及不同浓度纽翠绿腐植酸液肥对湘晚籼17号、创香5号稻米镉含量和硒含量的影响.结果表明,在施肥类型上,农香18在施用富硅土、鸡粪处理下的产量和硒元素含量较高,镉元素含量较低;在不同类型配比上,农香18在7 kg/667m2富硅土结合5 mL/L的高氮型液肥,再追施5 mL/L高钾型液肥的处理下,产量较高,稻米镉含量较大幅度降低.纽翠绿氮、钾液肥在浓度2.5~5.0 mL/L范围内,可降低湘晚籼17号稻米的镉元素含量,但对创香5号降低镉含量方面的作用较小,在该浓度范围内,创香5号稻米的硒含量相对稳定.
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Key words
humic acid liquid fertilizer,humic acid,high-quality
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