Effect of Foliar Application of Neodymium on the Growth and Nutrition of Brassica napus L.

摘要

The glasshouse study examined the effect of a single foliarspray of neodymium (Nd) on the growth and nutrient concentration of rapeplants (Brassica napus L.). The application of Nd at concentrations of 20 and100 mg Nd(NO_3)_3 L~(-1) increased the dry weight of the sprayed leavesand roots but decreased the weight of unsprayed younger leaves. This foliarapplication of Nd at the vegetative stage increased seed yield by 11-23 percentwhich resulted from the increased pod number and seed size. Althoughconcentrations of N and K, and total uptake of N, P and K increased in thesprayed leaves, the application of Nd decreased concentrations of N, P, K andCa in the unsprayed younger leaves, and of K and Ca in the root. The resultssuggest that the increased seed yield of rape by foliar application of Nd doesnot result from an improved nutrition of N, P, K or Ca.