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| Study on the technology of joint application of controlled release fertilizer and super absorbent polymer in current sand-fixation technology system |
| Zhang Xiangsheng,Tian Zhihong,Xiong Tao |
| College of Life Science,Yangtze University,434025,Jingzhou,Hubei,China |
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Abstract 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(<i>Glycyrrhiza uralensis</i>).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.
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Received: 31 October 2006
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