Study on Nutrient Management for Oroxylum indicum (L.) Vent. Production

Abstract

The study on nutrient management for commercial production of Oroxylum indicum (L.) Vent. Experiments within Phichit agricultural research and development center Rong Chang subdistrict, Mueang district, Phichit province. The experiment was RCB with 6 treatments, 4 replicates. Determine the proportion of N : P : K, N be equal to 1-3 parts, P remains equal to 1 part and K be equal to 1-3 parts. In treatment 1 the nutrient ratio N : P : K is equal to 1:1:1, treatment 2 the nutrient ratio N : P : K is equal to 1:1:2, treatment 3 the nutrient ratio N : P : K is equal to 1:1:3, treatment 4 the nutrient ratio N : P : K is equal to 2:1:1, treatment 5 the nutrient ratio N : P : K is equal to 2:1:2 and treatment 6 the nutrient ratio N : P : K is equal to 2:1:3. The study period is October 2022 – September 2024. From the experiment showed that height, canopy width and trunk circumference was no statistical difference. The nutrient ratio N : P : K is equal to 2:1:2 are highest, 237 centimeters. The nutrient ratio N : P : K is equal to 1:1:1 have a maximum canopy width of 189 centimeters. The nutrient ratio N : P : K is equal to 2:1:2 have a maximum trunk circumference width of 24.1 centimeters. But in the part of the days number of flowering in 50 percent and yield there was a statistical difference. In treatment 5 the nutrient ratio N : P : K is equal to 2:1:2 gives the least number of flowering days, 392 days and treatment 1 the nutrient ratio N : P : K is equal to 1:1:1 gives the highest yield, 341 kg./rai.