Respon dan Produktivitas Padi Rawa terhadap Cekaman  Rendaman Stagnan untuk Pengembangan di Lahan Rawa Lebak

Yullianida ,; Sintho Wahyuning Ardie; Suwarno ,; Hajrial Aswidinnoor

doi:10.24831/jai.v43i1.9583

Yullianida , 1Program Studi Pemuliaan dan Bioteknologi Tanaman, Sekolah Pascasarjana, Institut Pertanian Bogor 2Balai Besar Penelitian Tanaman Padi (Indonesia Center for Rice Research) Kebun Percobaan Muara, Jl. Raya Ciapus No. 25A Bogor Barat 16119, Indonesia
Sintho Wahyuning Ardie Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor (Bogor Agricultural University), Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia
Suwarno , Balai Besar Penelitian Tanaman Padi (Indonesia Center for Rice Research) Kebun Percobaan Muara, Jl. Raya Ciapus No. 25A Bogor Barat 16119, Indonesia
Hajrial Aswidinnoor Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor (Bogor Agricultural University), Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia

DOI: https://doi.org/10.24831/jai.v43i1.9583

Abstract

ABSTRACT
The limited fertile land and increasing flood intensity as a result of global climate changes become serious constraints in the sustainability of national rice production. Improvement of rice varieties, especially for rice cultivation in swampy area is necessary. The objective of this research were to evaluate responses and productivity of rice genotypes to stagnant flooding stress which occurs on swampy area. A total of 22 genotypes had been tested, included Tapus, IR42, and IR64 as check varieties. Water level at stagnant flooding environment was 50-60 cm and started from 35 days after planting until harvest. Research was conducted in wet season of 2011/2012 at Babakan Experimental Farm, Bogor Agricultural University. The experiment used randomized block design with three replicates. The results showed that stagnant flooding stress caused an increase in plant height, flowering and maturity date, number of unfilled grain, and stem elongation ability. On the other hand, the number of productive tiller and the number of filled grain decreased. The number of filled grain positively correlated with grain yield (r = 0.74**), but stem elongation ability didn’t have strong correlation with grain yield (r = -0.29). Genotypes IPB107-F-5-1-1 and IPB107-F-82-2-1 showed the highest productivity, 5.47 ton ha-1 and 5.80 ton ha-1,, respectively, at which productivity decreased up to 20% compared to optimum condition.
Keywords: basin swampy rice, stagnant flooding