钾钙肥中硅的缓释性研究

Slowly-Releasing Study of Silicon in Potassium and Calcium Fertilizers

针对钾钙肥中有效氧化硅含量高是否影响钾钙肥的缓释性问题进行了研究。以水和2%柠檬酸溶液为浸取液,测定了氧化硅随时间变化的溶出率,模拟植物吸收养分进行实验,测定了氧化硅的累积溶出率,通过实验数据进行了统计回归分析;参照Trenkel提出的缓释标准验证了钾钙肥中硅的缓释性效果。研究不同面积及不同溶剂量对缓释性的影响。结果表明:在模拟植物吸收养分的情况下,钾钙肥中硅的养分溶出速度缓慢,具有较好的缓释性,其累积溶出率完全符合缓释肥所要求的肥料释放率,满足植物生长需要。

Author has studied in allusion to the problem whether the high content of effective silicon oxide contained in the potassium and calcium fertilizers can influence the slow -releasing property of potassium and calcium fertilizers, has measured the dissolving rate of silicon oxide taking the mixing solution of water and 2% citric acid as soaking liquid. The accumulative dissolving rate was measured by use of an experiment simulating plant absorbing the nutrient, statistical regression analysis was made through the experimental data; slowly-releasing property effect of silicon was certified referring the slowly-releasing fertilizer standard presented by Trenkel. Study was made for influence of slowly-releasing property on the different bottom area and different solvent quantity. Result indicates ： Under the condition for simulating plant absorbing the nutrient, the dissolving speed of silicon nutrient contained in the potassium and calcium fertilizers is slow and has better slowly-releasing property , the accumulative dissolving rate fully satisfies the fertilizer slowlyreleasing rate required by slowly-releasing fertilizer, and also meets the growth demand of plant.