Phosphate Fertilization Efficiency Improvement with the Use of Organic Fertilizer and its Effect on Soybean Plants in Dry Land.

Abstract

Efforts to increase domestic soybean production have been widely carried out by farmers, including the management of soil fertility, such as the use of inorganic fertilizers. However, the development of soybean is generally on marginal dry land, the use of inorganic fertilizers is often inefficient (especially phosphate fertilizers), because phosphorus is fixed by Al or Fe. This study aimed to improve the efficiency of phosphate fertilization by the use of organic fertilizers from the wild plant Calopogonium moconoides and their effect on increasing yields of soybean crops on dry land. This research was conducted on the dry land of Takalar Regency, south Sulawesi, Indonesia. This research was carried out in the dry land of South Sulawesi, Indonesia. The experiments were arranged on the Split Plot Design. As the main plot was the dose of organic fertilizer from the wild plant Calopogonium consisting of three levels, namely 10, 15 and 20 t ha-1 as sub-plots were inorganic P fertilization consisting of three levels, namely 50, 100 and 150 kg SP36 ha-1. Each treatment was repeated three times so there were 27 experimental units. The results showed that the application of organic fertilizer with a dose of 20 t ha-1 increased growth and increased yields shown by higher plants and significantly more pods and higher production per ha (2.15 t ha-1). Increasing the dosage of organic fertilizer and increasing the dose of inorganic P fertilizer increased the availability of nutrient phosphorus.