Document Details
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Document Type |
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Thesis |
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Document Title |
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Effect of Plant Density, Topping and Nitrogen fertilizer Rates on Yield, Yield Components, Oil and Protein Contents of Safflower (Carthamus tinctorius L.). تأثير الكثافة النباتية والتطويش ومعدلات السماد النيتروجيني على المحصول ومكوناته ومحتوي الزيت والبروتين في القرطم |
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Subject |
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Faculty of Meteorology, Environment and Arid Land Agriculture |
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Document Language |
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Arabic |
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Abstract |
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This investigation was conducted in the Agricultural Research Station at Hada AL-sham, King Abdulaziz University during 2016/2017 and 2017/2018 seasons. The major objective of this research study was to introduce a new high tolerance crop to the environment al stresses in Saudi Arabia, especially in the western region. In addition, this crop (Safflower) is an economic oilseed crop. The minor objectives of the study were determining the best nitrogen fertilizer rate, Plant spacing to maximize seed, and petal yields besides seed oil and protein contents under topping and no-topping plants. Also, tested the effects of the previous factors and their interactions on four soil properties i.e. soil pH, soil salinity, soil nitrogen 9%) and soil organic matter (%). Split split plot design with 4 replicates was used in both studied seasons. The main results from this research study were: Nitrogen fertilizer rates and plant topping significantly affected seed yield/ha, petal yield/ha and yield components such as no. of branches/plant, no. of heads/plant, seed weight/plant and 100-essd weight as well as seed oil and protein contents during both seasons. No significant effects were showed for plant spacing on seed yield/ha or petal yield/ha. The interaction between nitrogen fertilizer rates and plant spacing or nitrogen fertilizer rate and plant topping significantly affected seed yield/ha and petal yield/ha. The highest seed yield/ha was obtained from 138kg N/ha without significant difference from 184kg N/ha in both seasons. Seed yield/ha were 3.22 t/ha and 3.29 t/ha under 184 kg N/ha and 138 kg N/ha in the first season and 3.01 t/ha and 2.85 t/ha under the same N rates in the second seasons. The lowest seed yield/ha was produced under the 46 kg N/ha in both seasons. The highest oil (%) was found under 92 kg N/ha (36.53% and 36.25 % in the first and second seasons, respectively) and the maximum seed protein contents were 16.89 % and 16.54% in both seasons under 184 kg N/ha. Under the plant spacing, seed yield/ha ranged from 2.48 t/ha - 2.83 t/ha in the first season and from2.25 t/ha - 2.83 t/ha in the second season. Petal yield/ha ranged from 116.35 kg/ha - 166.52 kg/ha in the first season and from 182.96 kg/ha -143.08 kg/ha in the second season. Plant topping significantly increased seed and petal yields/ha, besides yield components and seed oil and protein contents. Seed yield/ha were 2.81 t/ha and 2.54 t/ha under topping compared to 2.44 t/ha and 2.31 t/ha under no-topping in the first and second seasons, respectively. No significant effects were found for the studied three factors or their interactions on soil PH, salinity, N (%) or organic matters (%). The results of this study will be very benefits for the agricultural sectors including agricultural companies and producers. Because the edible oil of the crop is a good and healthy edible oil, high protein content in the seeds besides the uses of the petals as a source of natural dyes used in the food production. As well as safflower crop is classified as one from the tolerant crop to the environmental stresses, this study is very important for the agricultural economic especially agricultural economy and national Saudi Economy generally. |
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Supervisor |
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Prof. Dr. Fathy Saad EL- Nakhlawy |
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Thesis Type |
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Doctorate Thesis |
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Publishing Year |
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1440 AH
2019 AD |
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Co-Supervisor |
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Prof. Dr. Samir Gamil AL-Solaimani |
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Added Date |
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Wednesday, March 27, 2019 |
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Researchers
| محمد جارالله البقمي | Albogami, Mohammed Jarallah | Researcher | Doctorate | |
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