有机肥在沿海木麻黄防护林水肥耦合协同管理上的应用

为探索滨海沙地木麻黄水肥耦合协同管理技术，开展以有机肥为水载体配施磷肥试验，并与等吸水量的保水剂进行比较，探讨有机肥在木麻黄水肥协同管理上的应用效果，结果表明：以有机肥为水载体配施磷肥能明显促进木麻黄的生长，表现出显著的正效应且增产效果优于以保水剂为水载体的效应，提出水肥组合优化方案为水用量3kg．tree^-1即有机肥1000g．tre^-1＋过磷酸钙600g．tree^-1；此外，施用有机肥对土壤水分物理性状具有明显的改善效果，并能促进枯枝落叶的分解和根系的发育。采用有机肥作为水载体来协同管理木麻黄水肥条件是可行的，其在调控沙地水肥平衡上的应用潜力巨大。

ORGANIC MANURE APPLICATION ON COLLABORATIVE MANAGEMENT OF WATER AND FERTILIZE TO CASUARINA EQUSETIFOLIA SHELTER FOREST IN COASTAL SAND

This experiment was designed to investigate the coupling effect of water and phosphate fertilizer to Casuarina equsetifolia in coastal sand. The effect was also carried on a comparison with the water - absorbent - resin with the same amount of water. Results showed that P fertilizer combining with organic manure and acting as the water carrier could significandy promote the growth of Casuarina equsetifolia. By comparison, the organic manure presented very good effects to increase the Casuarina equsetifolia yield than the water- absorbent -resin did. The excellent combination of water and fertilizer was estimated as 3kg/tree （water） , lkg/tree （organic manure） and 0. 6kg/tree （superphosphate）. In addition, the application of organic manure could significantly improve the soil water physical properties, and promote litter decomposition and root development. The organic manure was applied as a feasible water carrier to collaborate water and fertilizer conditions for Casuarina. This method may play an important role in controlling management for the balance of water and fertilizer in coastal sand.