Abstract
Lettuce (Lactuca sativa L.) is a horticultural plant that is beneficial for health. Efforts are being made to expand the plant area. One of them is by utilizing marginal land such as peatlands. Peatlands in Indonesia are the most extensive soils in various tropical countries in the world that have low soil fertility and high acidity so that they are not optimal for lettuce growth. The provision of organic material can increase soil fertility by improving physical, chemical, and biological soil properties so that it can support lettuce growth. This study aims to determine the dose of cow manure and the dosage of oil palm empty fruit bunch fertilizer and the optimal dose interaction for growth and yield of lettuce. This research was conducted from June 2019 to August 2019 in Bengkulu City. This study uses a Completely Randomized Design consisting of two factors, which are repeated three times. The first factor is the dose of cow manure with three levels, namely: 0 tons ha-1, 15 tons ha-1, and 30 tons ha-1. The second factor is the dose of oil palm empty fruit bunch fertilizer, which consists of four levels, namely 0 tons ha-1, 5 tons ha-1, 10 tons ha-1, and 15 tons ha-1. The results showed that the dosage of cow manure 15 tons ha-1 and without the application of empty fruit bunches fertilizer gave the best results in leaf length of 18.674 cm. The best dose of cow manure for growth and yield of lettuce is 15 ha-1. The application of OPEFB fertilizer has not been shown to affect the growth and yield of lettuce.
Highlights
Lettuce (Lactuca sativa L.) is one growing season vegetable crop belongs to the Composite family
Growth and yield of lettuce (Lactuca sativa L.) on peat soil supplemented with cow manures and palm oil bunches fertilizer
According to Yulia et al (2010), applying the compost of empty fruit bunches of oil palm (EFB) produced the best leaf area, the number of leaves, and the fresh weight on the second planting, respectively, as 139.4 cm2, 11.19 strands, and 1,827.50 g The objectives of this experiment were to determine the optimum dose of cow manure, EFB fertilizer, and the interaction of them on the growth and yield of lettuce
Summary
Lettuce (Lactuca sativa L.) is one growing season vegetable crop belongs to the Composite family. Growth and yield of lettuce (Lactuca sativa L.) on peat soil supplemented with cow manures and palm oil bunches fertilizer. EFB, which constitute 23 percent of fresh fruit bunches; contain lignocellulose at 55 -60 % of dry weight. They contain cellulose of 38.76%, hemicellulose of 26.69%, and lignin of 22.23%. According to Yulia et al (2010), applying the compost of EFB produced the best leaf area, the number of leaves, and the fresh weight on the second planting, respectively, as 139.4 cm2, 11.19 strands, and 1,827.50 g The objectives of this experiment were to determine the optimum dose of cow manure, EFB fertilizer, and the interaction of them on the growth and yield of lettuce
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