อิทธิพลของการให้น้ำต่อการเติบโต คุณภาพ และผลผลิตของดาวเรือง

Abstract

The Study of the Influences of different irrigation regimes on the growth, quality, and yield of marigolds aimed to determine the appropriate irrigation rate and the efficiency of water use of marigolds. The experiment utilized a randomized complete block design with four treatments: daily irrigation at 10.62 mm/day (farmer’s conventional practice), daily irrigation based on evapotranspiration (ETc), and irrigation at 30% and 50% of available water capacity (AWC) depletion. The growth, quantity, and quality of marigold flowers were collected. The results showed that plant growth in terms of plant height, canopy size, and fresh and dry weight of flowers by the plant receiving different irrigation rates were significantly different. Daily irrigation according to the plant evapotranspiration rate gave mean plant height, canopy size, and maximum diameter of 64.13, 55.03, and 6.89 cm., respectively. Fresh and dry flower weights were 13.01 and 1.83 g/ flowers, respectively. Water use efficiency was 3.41 kg/m3 by irrigation at 50% of available water capacity (AWC) gave the lowest fresh and dry flower weight value 7.45 and 1.18 g/flowers, respectively. When considering quantity and quality yield, it was found that the yield and quality of marigolds from the four treatments were significantly different. Therefore, daily irrigation at the rate of evapotranspiration (ETc) was the most effective method for saving water and ensuring the optimal quantity and quality of marigold yield.