粉煤灰理化性质及改土增产效应研究

Study on Physical and Chemical of Fly Ash and Effects of Fly Ash on Soil Amelioration and Increasing Yield

研究了粉煤灰的理化性质及改土增产效应。结果表明 ,粉煤灰颗粒以物理性砂粒为主 ,含有Si、Fe、P、K、Ca、Mg、Zn、Cu、Mo、B等作物营养元素 ;施用粉煤灰能提高土壤物理性砂粒含量 ,增加土壤孔隙度 ,降低容重 ,对粘重土壤具有良好的改土效应 ;施用粉煤灰增产效果显著 ,每公顷施粉煤灰 10 0～ 30 0t,水稻增产 6 3%～ 13 5% ,小麦增产 7 7%～ 16 8% ,棉花增产 3 0 %～ 8 7%。

The physical and chemical properties of fly ashes and effects of fly ashes on soil amelioration and increasing yield were studied.The results are summarized as follows:the fly ash contains the amount of physical sand.The content of Si,Fe,P,K,Ca,Zn,Cu,Mo,B in fly ashes were nutritional element of crop.The applied fly ashes,the physical sand,the hole porosity of soil are increased.The unit weight are reduced and the effect of clay soil amelioralion was good.The effect of yield increase marked.If the applied fhy ashes is 100～300 t·hm -2 ,the rice yield,increased by 6 3%～13 5%,the wheat yield by 7 7%～16 8%,and the cotton yield by 3 0%～8 7%.