The present work studied the effects of soils liming and phosphorus fertilization on interespecific interference involving soybean and Alexander grass under greenhouse conditions. The experimental design was completely randomized with four replications. The treatments were amauged in factorial design 2x2x4 for each species with two conditions (species groueing alone or interespecific competition), two liming condition (none e with) and four levels of phosphorus fertilizations added to substrate (0, 50, 100 and 200 ppm). Interference of Alexander grass reduced height, leaf number, leaf area, total dry matter accumulation. Soy beam growth was increased by liming and phosphorus fertilization; however, Alexander grass growth was increased only by phosphorus fertilization. Liming and phosphorus fertilization increased height, leaf number, leaf area and dry matter accumulation in soy beam. Phosphorus fertilization increased height, tiller number and total dry matter in Alexander grass. As the phosphorus fertilization increased the interference of Alexander grass also increased.
Glycine max; Brachiaria plantaginea; competition; lime