Open AccessRespuesta de cultivares de girasol a la densidad de población en dos ambientes.
Author(s) -
Alfredo S. Ortegón,
Arturo Díaz
Publication year - 2006
Publication title -
agronomía mesoamericana (impresa)/revista agronomía mesoamericana/agronomía mesoamericana
Language(s) - English
Resource type - Journals
eISSN - 1659-1321
pISSN - 1021-7444
DOI - 10.15517/am.v10i2.17929
Subject(s) - randomized block design , cultivar , hybrid , sunflower , horticulture , biology , population , grain yield , yield (engineering) , agronomy , materials science , metallurgy , demography , sociology
Two hybrids of sunflower (Dekalb G-100 G101) and two varieties of free pollination (Rib-77 and Victoria), in three densities of population (31.250, 41.660 62,500 plants/ha) were evaluated. The objective was to determine differences among varieties under climatic conditions of the northern Tamaulipas, Mexico. In 1994 the plantation was established in a cycle considered as “late”; in 1995 a second plantation was established in a cycle considered as “late”. It was used a divided block design in a randomized block distribution with four repetitions. The greater plot corresponded to the cultivars and the minor parcel to the densities of population. Results obtained in the “late” cycle showed a grain yield average of 1.678 kg/ha and in the “early” cycle of 2.170 kg/ha, these results were consistent with the cycles x cultivars interaction. Hybrids and Rib-77 variety were statistically equal in each cycle for grain yield. Hybrids overcame cultivars in oil content. For the densities it was found that for a lower density population produced a higher grain weight, stem diameter, and weight of 100 seeds.