Effect of Potassium and Sulphur Fertilizers on Yield, Yield Components and Seed Quality of Spring Canola (Brassica napus L.) Seed

摘要

An experiment was conducted during 2004 to study effects of potassium and sulphur fertilizers on yield, yield components and seed quality in canola (Brassica napus L.) CV, Hayola 401 at experimental farm in research station of agricultural college ofShahid Bahonar University of Kerman. The experimental was conducted on a tree-replicated split-plot design with K treatment as the main plot and S treatment as the sub plot. The levels of potassium were (0, 60, 90 and 120 kg ha~(-1)) and sulphur were (0,40, 80 and 120 kg ha~(-1)). Dry-matter accumulation of plant increased with increasing levels of applied S, but showed no significant effect with increasing levels of applied K. Number of primary and secondary branches increased with increasing S application(117 and 32.4%), but unaffected with K application. Average seeds/pod increased with increasing levels of S application. Although the differences were not significant with increasing levels of application (13.5%), but it was not influence with K application, 1000 seed weight increased with increasing levels of S application (37.59%) and levels of applied K (1.14%). The increase of 3.89 and 6.0% in seed oil content was respectively realized with increasing the rate of 0 to 40 and 40 to 80 kg S ha~(-1), but the increased of application S from 80 to 120 kg S ha~(-1) showed no significant increased in oil content, seed oil content was insignificantly affected by increasing the levels of K. Seed protein content of canola was unaffected by K and S application, Seed yield was, respectively realized with increasing of applied S from 0 to 40 and 40 to 80 kg ha~(-1) and 80 to 120 kg ha~(-1), but the increased of applied K from 60 to 90 kg ha~(-1) and 90 to 120 kg ha~(-1) showed no significant increase in seed yield. The increase of 3.81% in oil yield was realized with increasing the rate of 0 t 60 kg K ha~(-1), but the increased of application K from 60 to 90 kg K ha~(-1) and 90 to 120 kg K ha~(-1) showed no significant increased in oil yield/ha. While significant increased (51.41%) was observed with higher input of S (120 kg ha~(-1)). Protein yield ha~(-1) was insignificantly affected by increasing the levels of K application, but significant increase (32.80%) was observed with higher input of S (120 kgha~(-1)). Total S uptake in seed significantly increased with application S (0 to 120 kg ha~(-1)), but was unaffected with K application.