تأثير الرش بالزنك على بعض الدلائل الفيزيولوجية و الإنتاجية لنبات القطن (G. hirsutum L.)‎

Abstract EN

This work was carried out during two seasons (2004-2005) at the production center of Alghab region, Hama – Syria, to study the effect of spraying with zinc to cotton plant on some physiological and production indices.

Three concentration of zinc as the form of zinc sulfate (ZnSo4) were tested: 0, 0.5, and 1.0%, sprayed on studied cotton First, single spraying treatment, at the budding stage only (45 days after planting), second, double spraying treatment, at the budding stage (45 days after planting) and at the flowering stage (70 days after planting).

A split plot design with 4 replications was used.

Obtained results indicated to the following: A single spray of Zn (0.5%) showed significant increases in the accumulated dry matter, crop yield, harvest index, yield index, ginning ratio, ginning index seed index and the cotton seeds, compared with the control.

1.0% concentration caused significant increases in all studied indices compared with the control, whereas the increases was non- significant at 0.5% concentration in ginning ratio and ginning index.

Double spraying with Zn showed significant increase in all studied indices comparing with single spraying method.

The interaction among experiment factors and treatments showed good values in double spraying method at 1.0% concentration when the average crop yield approached 5585.0 Kg.

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