以蓖麻为试材，研究了不同施肥条件下高分子聚合物对沙地的改良和利用效果。结果表明，播前在沙地施入高分子聚合物后再施用肥料，可以有效的提高土壤的保水能力，改善作物的生长习性和提高产量，减少耗水量和提高作物水分利用效率。对蓖麻产量和水分利用效率影响最大的为氮肥，其次为磷肥，钾肥最小。氮、磷、钾肥配合施用效果最好。

With Castor as test material， the improvement and utilization effects of high polymer under different fertilization on sandy land is studied . The result shows that the sand was applied polymer before sowing before applying fertilizers again， can effectively improve the soil water retention capacity， improve crop growth habit and increase production， reduce water consumption and improve crop water use efficiency . The biggest impact of the yield and water use efficiency of castor oil plant is nitrogen fertilizer， phosphate fertilizer is the second smallest. Nitrogen， phosphorus， potassium fertilizer had the best effect .

S565.6

国家科技支撑计划项目“西部水土流失和瘠薄干旱中低产田改良技术集成示范”(2012BAD05B03)部分内容