固沙技术中控释肥与吸水剂联用技术研究

 为解决固沙技术中水与肥的“瓶颈”问题,在模拟沙地中研究添加控释肥与吸水剂对固沙植物甘草生长发育的影响。结果表明:不同的控释肥对吸水剂的吸水率影响不同,各种控释肥料在沙土中分解释放速度远小于尿素;添加一定量的控释肥均可促进甘草的生长发育,表现在株高、根长、侧根数、叶片发育、生物量(干质量)和对营养元素(N、P、K)的吸收等方面。因此,在固沙植物栽培中添加控释肥与吸水剂的技术是可行的,为解决固沙植物的水肥问题提供了新的思路。

Study on the technology of joint application of controlled release fertilizer and super absorbent polymer in current sand-fixation technology system

o overcome the "bottleneck" problem concerning water and nutrition in current sand-fixation technology system,experiments were carried out for two years in desert-simulating sand to study the influence of adding controlled release fertilizer(CRF) and super absorbent polymer(SAP) to cultivation system on the growth and development of liquorice(Glycyrrhiza uralensis).Results showed that different CRF had different effect on water absorbent rate of SAP and various CRF released nutritional elements in simulated sand much more slowly than urea.Adding an amount of fertilizer to the technology system could prompt the growth and development of liquorice in shoot height,taproot length,lateral root number,development of leaf,biomass(dry weight) and nutritional elements(NPK) absorption.The present study confirmed that the technology of adding SAP and CRF was applicable and it also found out a novel means to solve the problem of water and nutrition of sand-fixing plant.