Effect of phosphorus deficiency on rape

The content of phosphorus in the plant decreased and the ratio of nitrogen to phosphorus changed from 3 to 5: 1 to 10 to 12: 1 in the normal plant. Phosphorus deficiency also caused poor root development, smaller leaves and thickened mesophyll. Leaves dark green or grayish green, lack of luster. Petiole purple, vein margin purplish red spots or patches. The number of leaves is 2 to 3 less than that of normal plants, bolting is slow and bolting color is red. When there is serious phosphorus deficiency, the leaves become dark purple and gradually wither, so that they can not bolt and blossom. Under moderate phosphorus deficiency, the branches and pods decreased, the grains were not full, and the yield decreased significantly.