腐植酸液肥在优质稻上的应用效果研究

Study on Application Effect of Humic Acid Liquid Fertilizer on High-quality Rice

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/667m^2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。

Using high-quality Indica rice Nongxiang 18, Xiangwanxian 17, Chuangxiang 5 as materials, the effects of different types and proportions of Nutri Grow humic acid liquid fertilizer on the yield and the contents of cadmium and selenium of Nongxiang 18 were studied under fi eld conditions, as well as the effects of different concentrations of Nutri Grow humic acid liquid fertilizer on the contents of cadmium and selenium of Xiangwanxian 17 and Chuangxiang 5 rice. The results showed that, for the fertilizer types, Nongxiang 18 had a higher yield and selenium content but a lower cadmium content under the treatment of silicon-rich soil and fowl dung; for the ratios of fertilizers, Nongxiang 18 had a higher yield and a more signifi cant reduction in rice cadmium content under the treatment of applying 7 kg/667m^2 silicon-rich soil and 5 mL/L high-nitrogen-type fertilizer, topdressing 5 mL/L high-potassium-type fertilizer. The Nutri Grow nitrogen, potassium fertilizer could reduce the cadmium content of Xiangwanxian 17 within the concentration range of 2.5-5.0 mL/L, but played a lesser role in reducing the cadmium content of Chuangxiang 5. The selenium content of Chuangxiang 5 was relatively stable within the range of the concentration.