保水剂对玉米生长和土壤养分转化供应的影响研究

Studies on the Effects of Water-retaining Agents on Maize Growth and Soil Nutrient Transformation

利用盆栽试验研究了砂薄土壤中施用保水剂对作物的生长性状及生物量和施入保水剂后对土壤养分转化与供应的影响,研究结果表明,施用保水剂能显著提高株高,增加总叶面积,增加作物的生物学产量和提高肥料利用率改变土壤的固、液、气相比,使之更趋于合理同时保水剂的施用使得土壤有效水贮量增加,在提高土壤田间持水量和速效钾含量的同时,也促进了土壤中有机物质分解与矿化。

This paper studied the effects of water-retaining agents on maize growth characters and biomass and soil nutrient transformation in sandy soil by pot experiment.The results showed that plant height and total leaf area were remarkably increased, the biomass of maize and the fertilizer use efficiency were promoted by supplying the water-retaining agents, too. The proportion of the solid, liquid and gas was changed, and became more rational. The capacity of available moisture was increased in the soil. At the same time,the water-holding capacity (WHC) and the amounts of available K were enhanced.Applying water-retaining agents can promote the decomposition and mineralization of soil organic matter, and can thus decrease the contents of soil organic matter.