Status of soil organic carbon and its management recommendation for rice plants at four experiment stations of the Indonesian Centre for Rice Research

Abstract

A survey, mapping, and compilation of recommendations for paddy field had been carried out in four Experimental Station of Indonesian Center for Rice Research in 2015-2016. The objective of detailed scale nutrient status mapping (<1:5,000) was to obtain information about the different variations in the diversity of organic matter status and its management. The results showed that C-organic content of paddy soils, of the 318,44 ha of paddy fields area at Sukamandi was low for 314.37 ha or 98.72% and moderate for 4.07 ha (1.28%). Pusakanagara experimental station, with 37.50 ha of paddy fields area, had low and moderate levels of soil C-organic contents on 8.68 ha (41.75%), and 12.12 ha (58.25%) area respectively. About 20.80 ha rice field area at the Kuningan research station contained low and medium C-organic on 8.68 ha (41.75%) and 12.12 ha (58.25%) area respectively. At Muara experimental station, soil C-organic was classified as low and moderate for 8.14 ha (40.72%), and 11.86 ha (59.28%) area respectively. To increase the C-organic status of this soil, it must be carried out to return harvested straw and or apply manure from outside at least 4 t ha-1.