Chinese cabbage ( Brassica chinensis ) production, using different kind and doses of organic fertilizer in Pangalengan, West Java, Indonesia.

摘要

Pangalengan is a center of vegetables and dairy cows in the province of West Java, Indonesia. Cow dung is generally discharged into waterways and on lands irrigated by the water channels. The low utilization of cow dung in Pangalengan is due to the fact that breeder do not have time to process cow manure. Therefore, farmers prefer to use chicken manure that is ready to use. Utilization of cattle waste as manure, vermicompost, as well as biogas can be an alternative waste processing in situ at the center of a dairy farm in Pangalengan, West Java, Indonesia. The purpose of this research was to get the most suitable type and dosage of organic fertilizer that will enhance Chinese cabbage production in Pangalengan, West Java. The experiment was conducted in farmers' fields in the village of Pangalengan, West Java from November to December 2014. The study used a randomized completed block design with two treatment factors and three replications. The first factor was six kind of organic fertilizer, i.e. cow manure, chicken manure, combination of cow and chicken manure (1:1 v/v), vermicompost, and wet and dry biogas waste. The second factor was two dosages of organic fertilizer, i.e. 10 and 15 ton ha-1. The results showed that there was no interaction between type and dosage of organic fertilizer. The highest production was obtained on dry biogas waste treatment which had the lowest CN ratio of organic fertilizer, but it was not significantly different from combination of cow and chicken manure treatment and wet biogas waste treatment. It means that the best organic fertilizer was the dry biogas waste, but combination of cow and chicken manure could substitute it. The best dosage of organic fertilizer was 15 ton ha-1.