Response of Giza 90 cotton cultivar to water stress and nitrogen levels with boron floiar application [electronic resource].

Includes reference.

The present study was carried out at Shandaweel Agricultural Research Station during 2009 and 2010 seasons to study the effect of water stress and nitrogen fertilization levels with boron foliar application on growth, seed cotton yield and its components of Giza 90 (Gossypium barbadense L). A split-plot design with four replications was used. The main plots were assigned to water stress treatments (irrigation every two weeks and three weeks). Nitrogen fertilization levels with boron foliar application i.e., 60 kg N/fed, 60 kg N/fed + foliar spraying by boron (at budding stage beginning), 60 kg N/fed + foliar spraying by boron (at flowering stage), 60 kg N/fed + foliar spraying by boron (at budding stage beginning and flowering stage), 75 kg N/fed, 75 kg N/fed + foliar spraying by boron (at budding stage beginning), 75 kg N/fed + foliar spraying by boron (at flowering stage) and 75 kg N/fed + foliar spraying by boron (at budding stage beginning and flowering stage) were assigned in the subplots. The results indicated that irrigation every two weeks significantly increased plant height at harvest, number of fruiting branches/plant, number of open bolls/plant, boll weight and seed cotton yield/plant in both seasons, while, days to first open boll, seed cotton yield/fed, days to first flower appearance and location of first fruiting node (in one season only).

Summary in Arabic.

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