Development and production of crambe ('Crambe abyssinica') under different nitrogen and phosphate fertilizers

The aim of this study was to evaluate the effect of combinations of nitrogen (0; 30; 60; 90; 120 kg ha -1 ) and phosphorus (0; 50; 75; 100; 125 kg ha -1 ) rates on the plant height, shoot biomass production, grain, lipid, nitrogen and protein yields, and leaf N and P content in crambe cultivated in Typic Haplorthox soil (Dusky Red Latosol). A completely randomized design with three replications was used totaling 75 experimental units. The results were submitted to a variance analysis (F-test) and regression study with 5% probability (p≤0.05). The nitrogen increased biomass production, grain yield and leaf nitrogen and potassium content. Phosphorus promoted an increase in the phosphorus and potassium accumulation in plant leaves. The interaction of nitrogen with phosphorus only increased the plant height. The grain lipid, nitrogen and protein content were not significantly affected as a function of phosphorus and nitrogen application in soil. Apparently, the growth and production characteristics of crambe plants did not respond to phosphorus fertilization.