Effect of Planting Date on Seed Yield, Oil Content, and Water Requirement of Safflower<sup>1</sup>

Luebs, R. E.; Yermanos, D. M.; Laag, A. E.; Burge, W. E.

doi:10.2134/agronj1965.00021962005700020009x

Cited by 7 publications

(4 citation statements)

References 7 publications

(10 reference statements)

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“…E XPERIMENTS in California have indicated that flax (Linum usitatissimum, L.) grown under cool climatic conditions at Pescadero produces oil with a higher degree of unsaturation than when grown under higher temperatures at Davis. Similar results have been obtained with flax in other flax growing areas ( 8) as well as with other oil crops-sunflowers ( 2), soybeans ( 3), cotton ( 6), and safflower (7). While temperature affects seed oil quality in the same way in a number of oil crops, the stage of plant development at which these effects attain their maximum expression is not known.…”

supporting

confidence: 71%

Effect of Temperatures During Plant Development on the Fatty Acid Composition of Linseed Oil¹

Yermanos¹,

Goodin

1965

Agronomy Journal

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Synopsis Differential temperatures (constant 50°, 60°, 70°, and 80° F.) were applied before and after initiation of floral primordia in two varieties of seed flax. Pre‐flower treatments caused significant differences in vegetative development but did not affect fatty acid composition of the seed oil of either variety. Post‐flower‐temperature affected fatty acid composition of the oil drastically. Linolenic acid decreased and oleic acid increased as post‐flowering temperatures increased from 50°to 80° F. Linoleic acid was not affected significantly.

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supporting

confidence: 71%

Effect of Temperatures During Plant Development on the Fatty Acid Composition of Linseed Oil¹

Yermanos¹,

Goodin

1965

Agronomy Journal

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“…Copyright Clearance Center Code St^itement: 0931-2250/91/6703-0170$02.50/0 Water Requirements of Safflower Entries in Middle Egypt 171 crop, and could be grown in desert areas with scanty rainfall. KNOWLES (1958), LUEBS et al (1965), STERN (1965) and GARCA and QUALAN-TAN (1967) stated that an annual rainfall of 300 mm is considered as the minimum precipitation necessary for production of the crop, and 600 mm for maximum yields. In their studies, the seed yields ranged from 500 to 1000, and up to 2000 kg/ha in fallow land.…”

Section: Introductionmentioning

confidence: 99%

Water Requirements of Safflower Entries in Middle Egypt

Ibrahim¹,

Sharaan²,

Wakil³

1991

J Agronomy Crop Science

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Two promising selected land races of safflower (Carthamns tinctorious L.) designated as line 11 and line 13, together with the local variety Giza 1, were examined under three levels of moisture depletions, i.e. 40, 60 and 80 % ASMD at Fayoum, Middle Egypt during 1986/87 and 1987/88 seasons. In both growing seasons, the second irrigation treatment i.e. 60 % ASMD gave the highest means for growth characters as well as seed yield and most of its components. Seed oil content per cent exhibited an increased as soil moisture depletion increased with no significant difference between entries. Safflower entries showed clear differences in some yield components which compensate each other and resulted in no significant difference in seed yield per hectar. Consumptive use of water by safflower plants increased as the available soil moisture around the root zone increased. No significant differences were found in water consumed by safflower entries used in all experiments. In the two experimental seasons, the best water use efficiency (WUE) for seed production was obtained also from the second treatment (60 % ASMD). The line 11 gave the best WUE.

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“…However, in order to further increase the seed yield of rice, the application of long-growth-duration varieties and a change in planting models such as from rice-rice-rapeseed to rice-rapeseed resulted in the extension of rice growth and a delay in rice harvesting. Similar to other crops, delayed planting of rapeseed and other oil crops such as safflower led to a lower seed yield and oil content [26,27]. The yield decrease due to the planting date being linked to the leaf development and physiological status has been widely studied [28,29].…”

Section: Introductionmentioning

confidence: 99%

Leaf Carbohydrate Metabolism Variation Caused by Late Planting in Rapeseed (Brassica napus L.) at Reproductive Stage

Ren

Zhu

Zhang³

et al. 2022

Plants

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Delayed planting date of rapeseed is an important factor affecting seed yield. However, regulation of the leaf carbohydrate metabolism in rapeseed by a late planting date at the reproductive stage is scarcely investigated. A two-year field experiment was conducted to assess the effect of planting dates, including early (15 September), optimal (1 October), late (15 October), and very late (30 October), on leaf growth and carbohydrate biosynthetic and catabolic metabolism at the reproductive stage. The results showed that leaf dry matter decreased linearly on average from 7.48 to 0.62 g plant−1 with an early planting date, whereas it increased at first and peaked at 14 days after anthesis (DAA) with other planting dates. Leaf dry matter was the lowest at the very late planting date during the reproductive stage. For leaf chlorophyll content, rapeseed planted at an optimal date maximized at 14 DAA with an average content of 1.51 mg g−1 fresh weight, whereas it kept high and stable at a very late planting date after 28 DAA. For the carbohydrate catabolic system, acid and neutral invertase (AI and NI, respectively) showed higher activity before 14 DAA, whereas both sucrose synthase (SS) and starch phosphorylase (SP) showed higher activity after 14 DAA. For the carbohydrate biosynthetic system, the activity of sucrose phosphate synthase (SPS) was the highest at the late planting date after 14 DAA, whereas it was at the lowest at the very late planting date. However, the activity of ADP-glucose pyrophosphorylase (AGPase) at the late and very late planting dates was significantly higher than that of the early and optimal plant dates after 21 DAA, which is in accordance with the leaf total soluble sugar content, suggesting that leaf carbohydrate metabolism is governed by a biosynthetic system. The current study provides new insights on leaf carbohydrate metabolism regulation by late planting in rapeseed at the reproductive stage.

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Effect of Planting Date on Seed Yield, Oil Content, and Water Requirement of Safflower¹

Cited by 7 publications

References 7 publications

Effect of Temperatures During Plant Development on the Fatty Acid Composition of Linseed Oil¹

Effect of Temperatures During Plant Development on the Fatty Acid Composition of Linseed Oil¹

Water Requirements of Safflower Entries in Middle Egypt

Leaf Carbohydrate Metabolism Variation Caused by Late Planting in Rapeseed (Brassica napus L.) at Reproductive Stage

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Effect of Planting Date on Seed Yield, Oil Content, and Water Requirement of Safflower1

Cited by 7 publications

References 7 publications

Effect of Temperatures During Plant Development on the Fatty Acid Composition of Linseed Oil1

Effect of Temperatures During Plant Development on the Fatty Acid Composition of Linseed Oil1

Water Requirements of Safflower Entries in Middle Egypt

Leaf Carbohydrate Metabolism Variation Caused by Late Planting in Rapeseed (Brassica napus L.) at Reproductive Stage

Contact Info

Product

Resources

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Effect of Planting Date on Seed Yield, Oil Content, and Water Requirement of Safflower¹

Effect of Temperatures During Plant Development on the Fatty Acid Composition of Linseed Oil¹

Effect of Temperatures During Plant Development on the Fatty Acid Composition of Linseed Oil¹