Abstract
In order to increase national rice production, the Ministry of Agriculture has released some high yielding varieties. The research was aimed to obtain superior rice varieties adapted to irrigated lowland agro-ecosystems of Southeast Sulawesi. In the first planting season, research was carried out in Olo-oloho Village, Uepai sub district and the second season at the Wawotobi Experimental Garden. Eight varieties were tested, i.e. Inpari 31, Inpari 34, Inpari 35, Inpari 38, Inpari 39, Inpari 41, Inpari 42, Inpari 43 and Mekongga. The variables observed were growth, yield and pest and disease dynamics. The results shows that there was variation growth and yield of the tested varieties. The growth and yield also varied depend on the season. In the first planting season, Inpari 34 and Inpari 43 showed better growth than others, but Inpari 31 resulted the highest rice yield (4.83 t/ha). In the second planting season, only Inpari 34 showed consistent growth, but the variety that had showed the highest yield was Inpari 43 (8.13 t/ha).
Highlights
A number of agricultural development programs has been issued by the government but is constrained due to a number of problems such as the limited agricultural resources, both in quality and quantity, especially land, water, vegetation, and human resources
The impact of climate change is very visible in the food crop sub-sector, such as the occurrence of floods, droughts and increased pest attacks, decreased yields and production quality
In 2013, it was known that the main disease of lowland rice was blast with an attack area of 2,414 ha [1] and the results of blast monitoring in Konawe Regency reached 40.25% [2]
Summary
A number of agricultural development programs has been issued by the government but is constrained due to a number of problems such as the limited agricultural resources, both in quality and quantity, especially land, water, vegetation, and human resources. In 2013, it was known that the main disease of lowland rice was blast with an attack area of 2,414 ha [1] and the results of blast monitoring in Konawe Regency reached 40.25% [2]. This condition needs serious attention to prevent its spread. According to the research results of Sularno et al [14], the use of the Inpari 13 variety can increase productivity by 33.92% and increase net profit by 56.57% Based on these conditions, it is necessary to study the use of superior varieties of rice seeds that are adaptive to the agro-ecosystem of irrigation rice fields and climate change in Southeast Sulawesi
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