Performance of high yielding varieties of rice in two planting season in the irrigated lowlands of South Kalimantan

Abstract

Lowlands in South Kalimantan are only about 54,455 ha (9.9%) of the total rice field area of 549,988 ha, most of them are irrigated paddy field that has been planted twice. The average productivity of rice in South Kalimantan is still low, which is around 4.46 t/ha milled dry grain. Rice productivity can be increased by the use of new high yielding varieties. In paddy fields, the use of new high yielding varieties with 2 seasons plantations is expected to increase rice production in the 2017 year in South Kalimantan which produces 2.25 million tons of rice. To find out the adaptation and yield of high-yielding rice, a study has just been carried out in rice fields in South Kalimantan. The activity was carried out in the village of Harapan Masa, Tapin Selatan sub-district, South Kalimantan district during the two planting seasons: Rainy season 2015/2016 and dry season 2016. Rice planted in rainy season 2015/2016 are varieties of Inpari-9, Inpari-20, inpari-21, and inpari-31, while in the dry season 2016 are varieties of Inpari-9, Inpari-30, inpari-31 and inpari-33. The results of the study showed that the average yield in the rainy season was higher (7.05 t/ha) compared to the results in the dry season 6.47 t/ha). In the rainy season, the highest yield was obtained in the Inpari-31 variety (7.95 t/ha), while in the dry season the highest grain yield was obtained by the Inpari-30 variety (6.99 t/ha). Inpari-9 and Inpari-31 varieties which were planted in the rainy season yielded higher yields of 7.30 t/ha and 7.95 t/ha respectively compared to those planted in the dry season of 6.29 t/ha and 6.19 t / ha.