الفهرس Only 14 pages are availabe for public view
 |  | from | 186 |  |  |
| | | from | 186 | | |
Abstract
SUMMARYY
Two field experiments were conducted in Ismailia, Agric. Res. Sta. of the A R C during 2006/7 and 2007/8 seasons to study the effects of 4 N levels (40, 55, 70 and 85 kg/fed) and 2 P levels (15 and 30 kg P2O5/fed ) on the performance of 6 flax genotypes , 2 fiber types (S.533/39/5/4 and S.22), 2 oil types (S.2419/1 and S.2465/3/1) 2 dual purpose types (S.402/1 and Sakha1). The soil of the experiment was sand (98% sand), poor in organic matter and nitrogen. The results could be summarized as follows:
1. Fiber yield and its components:
I.1. Genotypes performance:
S.402/1, a dual purpose flax , performed well in straw yield /fed, total fiber yield/fed, long fiber yield/fed and biological yield/fed. S.402/1 ranked the first position in these important characters, and significantly surpassed the two fiber flax types, in the combined average.
Sakha 1, a dual purpose flax, ranked the second position in total fiber yield/fed as well as long fiber yield/fed, in the combined average.
The two fiber flax genotypes were not promising and produced the lowest straw yield/fed, total fiber yield/fed, long fiber yield/fed and biological yield/fed. They ranked the fifth and sixth positions for S.22 and S.533/39/5/4, respectively.
The two oil flax genotypes S.2419/1 and S.2465/3/1 were inbetween in straw and fiber yields, and generally they produced higher straw, fiber and biological yields/fed than the two fiber types.
I.2. N fertilizer levels:
The increase in N level from 40 to 55, 70 and 85 Kg N/fed significantly increased growth and straw, total fiber, long fiber and biological yields/fed in both seasons.
1.3. P fertilizer levels:
Raising P2O5 level from 15 to 30 Kg/fed significantly increased straw yield/fed , total fiber yield/fed, and biological yield/fed in combined average of both seasons.
Raising P level from 15 to 30 Kg P2O5/fed did not significantly affect plant height, technical stem length , straw yield/plant and long fiber yield/fed in both seasons and their combined average .
I.4- Interaction effects:
The interaction between genotypes and N levels significantly affected plant height (in one season), technical stem length (in one season), stem diameter, straw yield/ plant ,straw yield/fed, total fiber yield/fed , long fiber yield/fed, and biological yield/fed (in one season)
The interaction between genotypes and P levels significantly affected plant height (in one season), technical stem length (in one season), stem diameter, straw yield/plant ,straw yield/fed, total fiber yield/fed , long fiber yield/fed ,and biological yield/fed .
N x P levels significantly affected stem diameter (in one season) ,straw yield/fed (in one season), and biological yield/fed (in one season).
The second order interaction significantly affected plant height, technical stem length, stem diameter, straw yield/plant, straw yield/fed, total fiber yield/fed, long fiber yield/fed, and biological yield/fed (in one season).
II. Seed yield Its components:
II. 1. Genotypes performance:
There was no relevance between top zone length and flax type. On the average of both seasons the two oil types ranked the second and fifth positions, the two fiber types were at the first and third positions and the two dual purpose types were at fourth and sixth positions.
Also, number of capsules/ plant indicated that the two oil types ranked the third and fourth positions, and no definite relation between this charachter and flax types was detected.
Number of seeds/capsule showed that the two oil genotypes ranked the fourth and sixth positions, whereas the two fiber genotypes ranked the first and second positions.
Seed index indicated a clear trend with flax type. The two oil types were at the first and second positions, the two dual purpose genotypes ranked the third and fourth positions, and the two fiber genotypes were at the fifth and sixth position , reconding the lowest seed indices.
The two oil genotypes recorded the second and third positions concerning seed yield/fed ,and the two dual purporse genotypes Sakha 1 and S.402/1 ranked the first and fourth positions, respectively, and the two fiber genotypes were the lowest seed producers.
The performance of the six genotypes concerning oil yield/fed was very clear and showed a close relation between flax type and this trait.
The two oil types S.2465/3/1 and S.2419/1 ranked the first and second positions, followed by the two dual purpose types Sakha1 and S. 402/1, at the third and fourth positions, and the two fiber types were the lowest oil producers at the fifth (S.22) and the sixth (S.533/39/5/4) positions.
II.2. N Fertilizer levels:
Raising N level from 40 to 55, 70 and 85 Kg N/fed significantly increased top zone length, number of capsules/plant, number of seeds/capsule, seed index, seed yield/plant, seed yield/fed and oil yield/fed in both seasons as well as their combined average.
The combined average of both seasons showed that raising N level from 40 to 55, 70 and 85 Kg N/fed significantly increased seed yield /fed by 12.17, 29.98 and 49.02 %,respectively.
Also, the same increases in N level resulted in the increase in oil yield, fed by 17.47 , 29.38 and 45.53%, respectively.
II 3. P fertilizer levels :
Raising P level from 15 to 30 Kg P2O5/fed significantly increased top zone length (in one season), number of capsules/plant (in one season) and seed yield/fed. On the other hand , the increase in P level did not significantly affect number of seeds/ capsule, seed index, seed yield/plant ,and oil yield /fed in both seasons .
II .4. Interaction effects:
The interaction between genotypes and N levels significantly affected top zone length, number of capsules/plants, number of seeds/capsule (in one season), seed index (in one season), seed yield/fed and oil yield/fed.
The interaction between genotypes and P levels significantly affected top zone length(in one season), number of seeds/capsule (in one season), seed index , seed yield/fed and oil yield /fed.
The interaction between N and P levels significantly affected top zone length (in one season), number of seeds/capsule, seed index (in one season), seed yield/plant (in one season), seed yield/fed and oil yield /fed.
The second order interaction significantly affected top zone length, number of capsules/plant (in one season), number of seeds/capsule, seed index, seed yield/plant, seed yield/fed and oil yield /fed.
III. Technological characters:
III.I. Genotypes performance :
The two fiber genotypes were superior in total fiber% and ranked the first and second positions. They were followed by the two dual purpose genotypes ranking the third and fourth positions. The two oil genotypes recorded the lowest total fiber%
The two fiber genotypes recorded the highest values of long fiber %, the two dual purpose genotypes recorded the fourth and fifth positions, and the two oil genotypes were at the third and sixth positions.
The genotypes tested indicated the superiority of the two fiber genotypes in fiber fineness ranking the first and seconded positions. They were followed by the two dual purpose genotypes and the two oil genotypes were the lowest in fiber fineness.
The two oil genotypes ranked the second and third positions in oil % and were followed by the two dual purpose genotypes.
On the other hand the two fiber genotypes were the two extremes, S.22 recorded the highest oil % and S.533/39/5/4 recorded the lowest oil %.
Fiber length showed no clear relationship with the flax type. The highest length was recorded by the fiber genotype S. 533/39/5/4 and the lowest value was recorded by the fiber genotype S. 22.
III.2. N Fertilizer levels :
Raising N level from 40 to 55 and 70 Kg N/fed significantly increased total fiber % in both season. A further increase of N level (85 Kg N/fed) resulted in a significant reduction in total fiber %. Similarly, the long fiber % increased significantly due to raising N level to 70 Kg/fed, but further increase in N level, reduced long fiber %, in both seasons.
Raising N level from 40 to 55, 70 and 85 Kg N/fed significantly reduced fiber fineness in both seasons .
Raising N level from 40 to 55 Kg N/fed significantly increased oil % in flax seed in both seasons. Further increase in N level to 70 and 85 Kg/fed, significantly reduced oil % in both seasons .
The increase in N level from 40 to 55, 70 and 85 Kg N/fed significantly increased fiber length in both seasons.
III.3. P fertilizer levels:
Raising P2O5 level from 15 to 30 Kg /fed significantly increased total fiber % (in one season) .
Raising P2O5 level from 15 to 30 Kg /fed did not significantly affect long fiber %, fiber fineness, oil % and fiber length in both seasons.
III.4. Interaction effects:
The interaction between genotypes and N level significantly affected total fiber % (in one season), long fiber %, fiber fineness, oil % and fiber length.
The interaction between genotypes and P level significantly affected total fiber %, long fiber %, fiber fineness, oil % (in one season) and fiber length .
N x P significantly affected total fiber % (in one season), long fiber %(in one season), and oil %.
The second order interaction significantly affected total fiber% (in one season), long fiber %, fiber fineness, oil % and fiber length.
CONCLUSIONS
The results showed that the two dual purpose genotypes could be recommended for sandy soils of Egypt. (S.402/1) was the first genotype concerning straw yield/fed, total fiber yield/fed, long yield/fed and biological yield. But produced lower seed and oil yields.
Sakha 1 was superior in seed yield/fed ranking the first position and was the second in total and long fiber yield/fed.
Also, the oil genotype (S.2419/1) could be considered as promoising flax variety in sandy soil, it ranked the seconed position in straw yield/fed, long fiber yield/fed, biological yield and oil yield.
In sandy siols the application of 85 kg N/fed could be recommended for producing higher fiber and seed yields. Also the application of 30 kg P2O5/fed could be co