ISSN:
1432-1319
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Crops of the early sunflower hybrid Suncross 150, and the later-maturing, open-pollinated sunflower Manchurian, were grown during a dry summer season when pan evaporation exceeded 200 mm per month. They were irrigated once only at 5 weeks, 7 weeks, 9 weeks or 11 weeks after sowing. There were also frequently irrigated and unirrigated treatments. The frequently irrigated treatments yielded most at equivalent to 2.24 t ha−1 in Suncross 150 and 3.69 t ha−1 in Manchurian, while the corresponding unirrigated yields were 1.05 t ha−1 and 1.97 t ha−1. In the single-irrigation treatments, the highest yields in both cultivars resulted from water application 3 weeks before anthesis, though the effect was not significant in Suncross 150. The better yields were associated primarily with the presence of more live leaf area during early grain filling (Table 2), but the efficiency of distribution of dry matter to the seed was also important in Suncross 150. Relationships between maximum green leaf area (A) and seed yield (Y) were well described by the curve Y=93.4A 0.794 (Fig. 2, Table 4), in accordance with earlier studies.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00285523
Permalink