Marketable tuber yield of radish (Raphanus sativus L.) as influenced by compost and NPK fertilizers

摘要

An experiment was done to assess the integrated use of compost and NPK fertilizers on marketable yield of radish (Raphanus sativus L.) variety Beeralurabu. It was carried out in a randomized complete block design with eight treatments which included recommended full doses of NPK fertilizers alone, compost alone and integrated use of compost plus half doses of recommended NPK fertilizers were applied as basal application and with or without full doses of NK fertilizers as top dressing. At harvest, tuber length, tuber diameter, total root length, fresh weight of tuber, dry weight of tuber, marketable yield and biological yield were recorded. All the collected data were subjected to statistical analysis. The result revealed that full doses of NPK fertilizers alone (standard control-T2), 20 t/ha compost alone (T4) and 10 t/ha compost plus half doses of NPK fertilizers (T6) as basal application and full doses of NK fertilizers as topdressing showed statically comparable performance for maximum of the parameters such as tuber diameter, fresh and dry weights of tuber, biological yield and marketable tuber yield. Treatment T4 and T6 showed higher mean value in most of the parameters especially in fresh weight of tuber (81.14g, 81.24g respectively) than T2 (68.90g). The application of 20 t/ha compost plus half doses of NPK fertilizers as basal and full doses of NPK fertilizers as topdressing (T8) exhibited significant variations (P<0.05) in marketable yield as well as biological yield than standard control treatment (T2). When concerning profitable way of cultivation, T8 causes to comparatively high cost of production and it may have over plant nutrition in radish cultivation. Therefore 20 t/ha compost alone (27.04t/ha) or 10 t/ha compost plus half doses of NPK fertilizers (27.07t/ha) as basal application with topdressing was the best choices than standard control (22.96 t/ha) for the increasing marketable tuber yield of radish. Thus saving certain amount of NPK fertilizers and improving soil conditions would be the benefits in radish cultivation.