水稻专用控释肥的养分释放规律及对养分利用的影响

Effect of Rice Special Controlled-release Fertilizers on Nutrients Utilizing and Yields of Rice

采用自制的水稻专用控释肥料,通过田间试验的方法,研究了不同膜厚度和添加抑制剂的包膜控释肥料养分释放规律和作物吸收特点,结果表明:包膜控释肥料的养分释放速度要低于常规复合肥处理,8%膜厚度的处理要好于5%膜厚度的处理,添加抑制剂后,土壤中的速效氮含量要明显高于常规复合肥;8%膜厚度肥料的养分吸收量要高于5%膜厚度的肥料,能够满足作物后期对养分的需求,添加抑制剂后肥料氮素吸收量高于不加抑制剂的处理;在施等量纯养分肥料条件下,添加抑制剂和包膜结合对作物产量的提高作用最明显。

The article is based on self-produced rice＇s controlled release fertilizers to study the different membrane thickness and adding inhibitor on nutrients releasing rules and rice＇s absorbing characters by field experiments. The results are： the nutrients releasing rate of controlled release fertilizers are lower than routine compound fertilizer, the treatment of 8% membrane thickness is prior to 5% membrane thickness; after adding inhibitor, the soil available nitrogen is higher than routine compound fertilizer evidently; the nutrients absorbing of 8% membrane thickness are higher than that of 5%, which can meet the nutrient need at the later stage; the nitrogen absorbing amount of adding inhibitor are higher than non-adding treatments. On the condition of equal pure nutrients of fertilizers, the increasing extent of adding inhibitor and coating membrane is the most distinct.