白浆土施用磷肥,作物增产效果比较明显。但在黑龙江三江平原地区应用较普遍的轮作中,小麦、玉米、大豆是否每年都要等量施用磷肥,以及作物根系能够达到的黑土层和白浆层中,磷的水平如何,施磷后效能维持几年等问题,均需加以解决。以期做到经济合理地施用磷肥,既能不断提高产量,又可维持地力,进一步发挥肥料的经济效益。 Albic soil phosphate fertilizer, crop yield more obvious. However, whether wheat, corn and soybean are applied equivalent amounts of phosphate fertilizer every year in the more commonly used crop rotation in the Sanjiang Plain of Heilongjiang Province and the level of phosphorus in the black soil layer and the white pulp layer that can be reached by the crop roots, To maintain a few years and other issues, need to be addressed. In order to achieve economic and rational application of phosphate fertilizer, both to continuously improve the yield, but also to maintain the fertility and further economic benefits of fertilizer.