Abstract
A field experiment was conducted in Wolkite University, Horticulture department practical demonstration site, from February to June 2019 with the objective of determining the optimum level of N and intrarow spacing for better growth of lettuce. The experiment consisted of four levels of N (N0 (0 kg/ha), N1 (50 kg/ha), N2 (100 kg/ha), and N3 (150 kg/ha)) and three levels of intrarow spacing (S1 (15 × 30 cm), S2 (20 × 30 cm), and S3 (25 × 30 cm)). The interrow spacing was maintained as 30 cm. The experiment was laid out in 3 × 4 factorial arrangement in a randomized complete block design (RCBD) and replicated three times. The main effect of nitrogen resulted maximum yield (9.45 ton/ha), dry weight per plant (28.75 g), and fresh weight per plant (57.57 g) which were recorded by the application of 150 kg/ha nitrogen. Likewise, the main effect of intrarow spacing gave maximum yield (8.01 ton/ha), dry weight per plant (21.31 g), and fresh weight per plant (59.15 g) from 25 × 30 cm plant spacing. For interaction effect, the highest yield (10.38 ton/ha), dry weight per plant (50.96 g), and fresh weight per plant (77.88 g) was found from N3S3 (150 kg/ha N and 25 × 30 cm plant spacing). Therefore, in the study, area using 150 kg/ha urea with 25 × 30 cm plant spacing could be advisable for optimum lettuce production.
Highlights
Lettuce (Lactuca sativa L.), an annual plant of Compositae family, is one of the most important vegetables in human diet
Leaf Length e main effect of N showed that the leaf length had significant difference for lettuce. e highest (23.12 cm) and the lowest (11.06 cm) leaf length was recorded by applying 150 kg/ha and 0 kg/ha N, respectively (Table 1)
Leaf Fresh Weight. e result of this study showed that both the main effect and the interaction effect of nitrogen and intrarow spacing were significantly affected the fresh weight of lettuce. e main effect of nitrogen showed significant variation except application of nil N and 50 kg/ ha N which did not show variation between themselves
Summary
Lettuce (Lactuca sativa L.), an annual plant of Compositae family, is one of the most important vegetables in human diet It is normally consumed raw and has a high nutrient value, being rich in calcium, iron, and vitamin A. It is a good source of vitamins and often prescribed to weight-conscious consumers because of its low kilojoules content [1]. E composition of lettuce leaves is approximately 94.3% water, 1.2% protein, 0.2% fat, 2.9% carbohydrate (CHO), 0.7% fiber, and 0.7% ash It is rich in vitamin A, C, and E and minerals such as calcium, phosphorus, sodium, magnesium, and potassium. Soil health is a crucial factor for realizing higher yield of vegetables
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