Utilization of By-product from Sugar Factory as Sources of Potassium on Growth and Yield of Cassava

การใช้ผลพลอยได้จากโรงงานน้ำตาลในแง่ปุ๋ยโพแทสเซียมต่อการเจริญเติบโต และผลผลิตของมันสำปะหลัง

Abstract

This study investigated the utilization of by-product from sugar factory (venasses powder, VP) as sources of potassium on growth and yield of cassava (var. Huay Bong 60) planted in Kamphaeng Saen soil series. The experiment was arranged in Randomized Complete Block Design (RCBD) with 3 replications and consisted of 7 treatments. The results showed that the application of VP of 64.15 kg/rai in combination with chemical fertilizer (CF) grade 21-0-0 and 0-46-0 of 69.33 and 8.52 kg/rai, respectively (VP_{8% K2O}, T₇) provided the highest plant height and leaf greenness (SPAD unit) which were not significantly different from the application of CF based on soil chemical analysis plus 100% of the K fertilizer from the original rate (CF_DOA+K_100%, T₄), the application of VP of 48.12 kg/rai in combination with CF grade 21-0-0 and 0-46-0 of 71.05 and 8.57 kg/rai, respectively (VP_{6% K2O}, T₆) and the application of CF based on soil chemical analysis plus 50% of the K fertilizer from the original rate (CF_DOA+K_50%, T₃). While, all treatments that applied CF or VP in combination with CF effected insignificantly on fresh root yield, average weight/root, root width, root length, starch content, starch yield/unit area and concentration of N and P in fresh root but significantly different when comparing with the control treatment (control, T₁) that had the lowest fresh root yield, average weight/root, root width, root length, starch content, starch yield/unit area and concentration of N and P in fresh root