金鱼草人工基质栽培中不同磷源效应的研究

EFFECTS OF VARIOUS PHOSPHORUS SOURCES ON FLOWER GROWTH IN THE ARTIFICIAL MEDIUM

Antirrhinum majus L. was grown in an artificial medium with applica- tions of rock phosphate, superphosphate, bone meal and calcium magnesium phosphate to study effects of various phosphorus sources on the growth and bloom of the flower and the absorption of phosphorus, nitrogen and potassium by the plant. The results indicate that phosphorus absorption by the plant is little in the seedling stage but increases significantly after flowering, phosphorus supply to the plant with rock phosphate is poor in the slight acidic artificial medium, resulting in phosphorus deficiency detering flowering. Phosphorus supply is good with bone meal whose effect is equivalent to that of superphosphate; the former is even better in the flowering stage. The best effect is calcium magnesium phosphate, which results in a linear increase of phosphorus absorption by the plant and produces more and bigger flowers with fresh and bright looking. It is suggested based on the experiment that bone meal or calcium magnesium phosphate together with a proper amount of superphosphate would be a suitable source of phosphorus for flower growth in the slight acidic artificial medium.