【摘要】 采用砂培方法 ,研究了低磷胁迫对耐低磷水稻品种 (大粒稻、莲塘早 3号 )与低磷敏感水稻品种 (沪占七、新三百粒 )幼苗生长和磷效率的影响。低磷胁迫后 ,沪占七、新三百粒的叶面积、株高、生长量受抑制程度明显大于大粒稻和莲塘早 3号。耐低磷品种的磷营养效率主要表现在磷的吸收能力 ,而不是磷素分配和利用效率差异。更多还原

【Abstract】 With sandy culture ,the effect of low-phosphorus stress on growth and phosphorus efficiency of the seedlings of the low-phosphorus-tolerant rice cultivars (Dalidao, Liantangzhao 3)and low-phosphorus-sensitive rice cultivars (Huzhanqi, Xinshanbaili) were carried out. The results showed that the leaf area, plant height and growth production of Huzhanqi, Xinshanbaili were inhibited more severely than those of Liantangzhao 3 and Dalidao. The high phosphorus efficiency of low-phosphorus-tolerant cultivars attributed to phosphorus uptake ability not the different distribution of phosporus and utilization ability.更多还原