【摘 要】
：
磷肥有很好的后效。据国外许多定位试验说明,磷肥的长期利用率达50—60％以上。广东从六十年代初开始推广使用磷肥至今,据计算近12年全省耕地的磷素收支接近平衡,而有相当一部
【机 构】
：
广东省农科院土肥所,广东省农科院土肥所,广东省农科院土肥所,
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磷肥有很好的后效。据国外许多定位试验说明,磷肥的长期利用率达50—60％以上。广东从六十年代初开始推广使用磷肥至今,据计算近12年全省耕地的磷素收支接近平衡,而有相当一部分地方反映磷肥肥效明显下降。究竟在我省条件下,经过长期施用磷肥的肥效如何?今后如何确定既能保持作物正常产量,又
Phosphate fertilizer has a very good after-effects. According to many foreign pilot test shows that the long-term utilization of phosphate fertilizer more than 50-60%. Since the early 1960s, Guangdong started to promote the use of phosphate fertilizer. Up to now, it has been calculated that the phosphorus balance of cultivated land in the entire province has been nearly balanced in the past 12 years. However, quite a few places have shown a marked decrease in the fertilizer efficiency of phosphate fertilizer. After all, under the conditions of our province, after long-term application of phosphate fertilizer how? In the future how to determine both to maintain normal crop yield, and
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