Weed diversity in rice (Oryza sativa) fields with different cultivation technologies in Garut Regency, Indonesia

Abstract

The presence of weeds in lowland rice cultivation will result in reduced growth and yield of rice plants, so the presence of weeds in cultivated crops must be controlled. Weed control applied to lowland rice cultivation will run effectively and efficiently after knowing the diversity of dominant weeds present in lowland rice cultivation. This study was conducted during 2017–18 at Padjadjaran University, Bandung, Indonesia to determine the diversity of weeds in lowland rice cultivation, both on conventional and SRI technology. The research was conducted on rice fields owned by farmers in four sub-districts in Garut Regency. The method used in this research is non-experimental through the survey method. Sampling was carried out on paddy fields using conventional planting system technology and SRI, each of 42 plots with a quadrant of 0.5 m x 0.5 m spread over four districts. The results showed that the types of weeds found in the conventional system were 20 types of weeds with the dominant weed Ludwigia hyssopifolia, in the SRI system there were 17 types of weeds with the dominant weed of Echinocloa crus-galli. The value of the diversity index (diversity) of weed species found in lowland rice cultivation in the Garut Regency area both in the conventional system and the SRI system is classified as moderate. The distribution pattern of all types of spatial weeds in lowland rice cultivation in the Garut Regency area, both in the conventional system and the SRI system, is included in the group distribution pattern.