Effect of some growth regulators and nitrogen levels on flax yield and its quality [electronic resource].

Includes references.

The present investigation was carried out at Sakha Agric. Research Station Farm during the two succcssive seasons of 2002/2003 and 200312004 to study the pffec( oftwo nitrogen levels (35 and 70 kg N/fad) and some growth regulators i.e. GA) at 20, 40 and 80 ppm and IAA and NAA at 10,20 and 40 ppm of each one compared with the check treatment on yield and its components and quality offlax plants (Sakha I cv.). This study was laid out in a split plot design with four replications. The obtained results could be summarized as follows: The application of35 kg N/fad significantly increased stcm dia'meter, fiber yield per plant as well as per fad.. finencss and strength of fibers, seed oil content in both seasons and seed ash content in the first season. Increasing nitrogen levels from 35 up to 70 kg N/fad. significantly increased seed index in the second season, seed yield/fad. In the first season, protein content and cmde fiber in both seasons of the study and total carbohydrate in the first season. The concentration of GA) of 20 ppm gave the highest secd protein content. Application of GA) at 40 ppm increased significantly straw and seed yields per fad., fineness and tenacity fibers. While, the high level of GA3 (80 ppm) increased significantly stem diameter, straw with capsule yield/fad.. fiber yield per plant and per fad., fiber percentage and fiber length in both seasons. Spraying with IAA at 10 ppm increased significantly seed index. seed protein content. While, the same rale ( I0 ppm) from NAA gave the highest value for number of secd/pl:ml in the first season. Application ofNAA at 40 ppm significantly increased fruiting zone length and straw with capsule yield/fad.

Summary in Arabic.

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