Influence of N and P application on flower yield and nutrient content of chrysanthemum (Chysanthemum morifolium Ramat.) cv. Flirt

摘要

A field trial was conducted for two consecutive years to investigate the influence of four levels of N (0, 10, 20 and 30g m~(-2)) and three levels of P (0, 10 and 20g P_2O_5 m~(-2)) on flower yield and nutrient content of chrysanthemum cv. Flirt. Fresh flower yield increased by 57.3, 110.6 and 90.3% in first year and 23.8, 72.5 and 48.1% in the second year with the application of 10, 20 and 30 g N m~(-2) respectively, over control, indicating consistent increase up to 20 g N nr2. Further increase inN level, decreased the yield significantly in comparison to preceding N level, nevertheless, the yield was higher than control. Similarly, the increase in flower yield was 33.1 and 53.6% in first year and 23.0 and 48.0% in second year with the addition of 10 and 20 g P_2O_5 m~(-2) respectively over control. Application of N and P interacted positively resulting in higher yield and a maximum yield (224% increase in first year and 193% increase in second year over control) was recorded at N_(20) P_(20) combination. Comparatively, more yield was obtained in all treatments in the second year of investigation. Nitrogen and phosphorus content in chrysanthemum plant improved with their application but potassium and zinc content were not affected by any treatment. Generally, lower content of N, P, K and Zn were recorded in second year as compared to first year due to higher dry matter yield in this year.