Kompetisi antara Ekotipe Echinochloa crus-galli pada Beberapa Tingkat Populasi dengan Padi Sawah (Competition of Echinochloa crus-galli Ecotypes at Several Populations Against Lowland Rice)

Dwi Guntoro; Muhamad Achmad Chozin; Edi Santosa; Soekisman Tjitrosemito; Abdul Harris Burhan

doi:10.24831/jai.v37i3.1236

Dwi Guntoro Departemen Agronomi, Fakultas Pertanian UKI Toraja
Muhamad Achmad Chozin Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor
Edi Santosa Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor
Soekisman Tjitrosemito Departemen Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor
Abdul Harris Burhan PT Rolimex

DOI: https://doi.org/10.24831/jai.v37i3.1236

Abstract

Echinochloa crus-galli is a major weed in paddy field that reduces rice yield. The objective of the research was to study the effect of E. crus-galli ecotypes and populations on rice growth and production. The research was conducted in a green house using split plot design with three replications. The main plot consisted of three E. crus-galli ecotypes i.e ecotype from Karawang, Cikampek, and Sukabumi. E. crus-galli population as sub plot consisted of 0, 1, 2, 3, and 4 E. crus-galli per pot. The results showed that ecotype of E. crus-galli affected plant height, number of tiller, and panicle density. The competitivenes against rice of E. crus-galli ecotype Cikampek was higher than that of ecotype Sukabumi and Karawang. Population E. crus-galli affected rice growth and production. Population of E. crus-galli 4/pot decreased spikelets weight about 48.0% and filled spikelets weight about 46.2%. Interaction of ecotype and population of E. crus-galli did not affect rice growth and production.

Key words: competition, ecotype, E. crus-galli, population, weed.