缓释肥对固沙植物甘草施用效果的初步研究

为了解决固沙体系中水与肥的瓶颈问题,尝试在体系中添加缓释肥与高吸水树脂(吸水剂)。在研究缓释肥与自主开发的吸水剂相容性的基础上,在栽培体系中添加一定量的吸水剂与缓释肥,在模拟沙池中试验,以研究该方案对固沙植物甘草的生长发育的影响。研究结果表明:不同的缓释肥对吸水剂的吸水率影响不同,各种缓释肥料在沙土中分解释放速度远小于尿素。在体系中添加一定量的缓释肥均可促进甘草的生长发育,表现在株高、根长、叶片发育、生物量(干重)等方面。本研究为解决固沙植物的水肥问题提供了较好的一个思路。

Preliminary Study on Effect of Application of Slow Release Fertilizer and Super Absorbent Polymer on Sand-fixing Plant Licorice

To overcome the"bottleneck" problem concerning water and nutrition in current sand-fixation technology system,we attempted to add slow release fertilizer(SRF) and super absorbent polymer(SAP) to it.On the basis of the compatibility of SRF and invented independently SAP,a pre-designed amount of SAP and SRF were added to cultural system and experiments were carried out for two years in desert-simulating sand to study the effect of this technique on growth and development of licorice.The results showed that different SRF had different effect on water absorbent rate of SAP and various SRF release nutritional elements in simulated sand much more slowly than urea.Adding more or less fertilizer to the technology system could prompt the growth and development of licorice in shoot height,taproot length,development of leaf and biomass(dry weight).The present study put forward a new means to solve the problem of water and nutrition of sand-fixing plant.