8SHAVIV A,MIKKELSEN R L.Controlled-release fertilizers to increase efficiency of nutrient use and minimize environmental degradation-A review[J].Fertilizer Research,1993,35:1-12.
9BROSCHAT T K.Release rates of soluble and controlled-release potassium fertilizers[J].Hortechnology,1996,6(2):128-131.
10CABRERA R I.Comparative evaluation of nitrogen release patterns from controlled release fertilizers by nitrogen leaching analysis[J].Hort Science,1997,32(4):669-673.
