Study on absorption properties of mineral elements of asparagus

The properties of dry matter accumulation and mineral elements absorption of asparagus (var. Applo) were studied. The results show that dry matter accumulation of asparagus plant at the spear harvest stage accounts about 26.2% of the total, and among this, 69.7% of the dry matter is accumulated in spear. While dry matter accumulation at the fern growing stage accounts 73.8% of the total, and among this, 70.9% dry matter is accumulated in fern. Asparagus absorbed K most, and then N. The absorption ratio of N︰P︰K︰Ca︰Mg is 3.33︰1︰4.77︰0.52︰0.23. K is accumulated equally at the spear harvest stage and the fern growing stage. Most of N, Cu and Zn are accumulated at the spear harvest stage, while most of P, Ca, Mg, Fe and Mn are accumulated at the fern growing stage. Suggestions for reasonable fertilization in different developmental stages of asparagus are proposed.