Spur survival and return bloom in almond [Prunus dulcis(Mill.) D.A.Webb] varied with spur fruit load, specific leaf weight, and leaf area

2008 ◽  
Vol 83 (2) ◽  
pp. 274-281 ◽  
Author(s):  
R. J. Heerema ◽  
S. A. Weinbaum ◽  
F. Pernice ◽  
T. M. Dejong
Keyword(s):  
Leaf Area ◽  
Prunus Dulcis ◽  
Specific Leaf Weight ◽  
Leaf Weight ◽  
Return Bloom ◽  
Fruit Load

VARIABILITY IN FORAGE AND SEED PRODUCTION AND SEEDLING GROWTH IN ASTRAGALUS CICER

1976 ◽  
Vol 56 (3) ◽  
pp. 487-491 ◽  
Author(s):  
S. SMOLIAK ◽  
A. JOHNSTON
Keyword(s):  
Leaf Area ◽  
Seed Weight ◽  
Germination Percentage ◽  
Forage Yield ◽  
Seedling Vigor ◽  
Specific Leaf Weight ◽  
Leaf Weight ◽  
Astragalus Cicer ◽  
Seed Yields ◽  
Seedling Leaf

Forage and seed yield, percentage seed germination, speed of germination index, and 1,000-seed weight were determined for a population of 170 plants selected from Oxley cicer milkvetch (Astragalus cicer L.). Seedlings from open-pollinated seed from the selected plants were measured for leaf weight and leaf area, and specific leaf weight was calculated. Most of the characters studied were asymmetrical in distribution. The correlation coefficient between forage and seed yields of mature plants was positive and highly significant. Seedling leaf weight was positively and closely related to seedling leaf area, but seedling leaf area was a more reliable indicator of photosynthetic efficiency. The variability in the characters studied in the selected population suggests that further improvement in forage yield, germination percentage, speed of germination, and seedling vigor may be obtained through a breeding program.

scholarly journals Effects of Water Volume and Nitrogen Fertilization on Yield and Quality Traits of Air-cured Burley Tobacco (Nicotianatabacum L.)

2011 ◽  
Vol 24 (4) ◽  
pp. 194-206 ◽  
Author(s):  
S Ascione ◽  
C Ruggiero ◽  
A Napolitano
Keyword(s):  
Leaf Area ◽  
Nitrogen Fertilization ◽  
Total Alkaloid ◽  
Price Index ◽  
Chloride Content ◽  
Water Volume ◽  
Nitrate Content ◽  
Specific Leaf Weight ◽  
Leaf Weight ◽  
Yield Value

AbstractBased on a two-year field trial in the region of Campania (Southern Italy) the effects of water volume and nitrogen fertilization on the yield and quality of Burley tobacco (Nicotianatabacum L.) were investigated with reference to the following traits: cured leaf yield, price index, yield value, leaf area, specific leaf weight, burning capacity, color parameters, total alkaloid, nitrate and chloride leaf content. The experimental design was a factorial comparison among three water volumes (40, 80 and 120% evapotranspiration (ET)), four nitrogen fertilization levels (0, 80, 160 and 240 kg ha-1) and two genotypes (cv TN86 and the hybrid R7-11). The yield of cured leaves rose with the increase in water and nitrogen availability, albeit at a decreasing rate. With the increase in water volume, the price index, burning capacity, specific leaf weight, total alkaloid and nitrate content decreased, while leaf area and chloride content increased. Up to a rate of 160 kg ha-1, nitrogen fertilization increased the price index, yield value, burning capacity, leaf area, specific leaf weight, total alkaloid and nitrates, and reduced leaf chloride content especially at 40% ET water volume. Both, nitrogen fertilization and water volume had little influence on leaf color. The year had considerable effects on yield, leaf area and color parameters, with higher values in the rainier season. In the two years, genotype TN86 showed higher stability for yield and yield value, lower alkaloid and higher nitrate content in the leaf than the R7-11 hybrid.

Increases in leaf nitrogen concentration and leaf area did not enhance spur survival and return bloom in almonds (Prunus dulcis [Mill.] DA Webb)

2017 ◽  
Vol 39 (4) ◽  
Author(s):  
Sebastian Saa ◽  
Eduardo Fernández ◽  
Saiful Muhammad ◽  
Andres Olivos-Del Río ◽  
Theodore M. DeJong ◽  
...  
Keyword(s):  
Leaf Area ◽  
Nitrogen Concentration ◽  
Prunus Dulcis ◽  
Leaf Nitrogen ◽  
Leaf Nitrogen Concentration ◽  
Return Bloom

Relationship between Crop Growth Parameters and Seed Yield in CMS Analogues in Sunflower

Helia ◽  
2015 ◽  
Vol 38 (62) ◽  
pp. 109-120 ◽  
Author(s):  
Vikrant Tyagi ◽  
S. K. Dhillon
Keyword(s):  
Grain Yield ◽  
Leaf Area ◽  
Harvest Index ◽  
Dry Weight ◽  
Hybrid Breeding ◽  
Oleic Acid Content ◽  
Specific Leaf Weight ◽  
Area Index ◽  
Leaf Weight ◽  
Leaf Dry Weight

AbstractNine new cms analogues on the base of diversified cms sources were developed and evaluated for morphological, agronomic, physiological and biochemical traits, including the field resistance to the prevalent diseases of sunflower under Punjab conditions. As a result of this study, the most prospective cms analogues were designated for future use in hybrid breeding programme. The results revealed that selection for tall plants with large head size and high chlorophyll content may be associated with high grain yield as well as oil content and high oleic acid content in sunflower. Leaf dry weight, biological yield, harvest index, specific leaf weight and relative leaf water content had direct positive effect on grain yield. The harvest index, specific leaf weight/plant, leaf area index and leaf area had indirect effects (through leaf dry weight) on grain yield. These traits are advocated as selection criteria for grain yield improvement in sunflower.

scholarly journals POINSETTIA GROWTH AND DEVELOPMENT IN RESPONSE TO DAY-NIGHT TEMPERATURE REGIME AND UNICONAZOLE.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1074c-1074
Author(s):  
Richard J. McAvoy
Keyword(s):  
Leaf Area ◽  
Temperature Regime ◽  
Dry Weight ◽  
Plant Canopy ◽  
Night Temperature ◽  
Specific Leaf Weight ◽  
Leaf Weight ◽  
Temperature Regimes ◽  
Potting Medium ◽  
Total Plant

Poinsettias, Euphorbia pulcherrima Willd. cvs Lilo and Diva Starlight, were exposed to either warm day-cool night or cool day-warm night greenhouse temperature regimes. Day time temperatures were imposed between 900 to 1600 HR. Within each temperature regime, poinsettias were grown single stem or pinched and drenched with either 0.04 or 0.08 mg a.i. uniconazole per 1.6 1 pot or grown as untreated controls. Light levels (PAR) and potting medium and plant canopy temperatures were continuously monitored.Over the course of the study, the day-night temperature differential (DIF), in the plant canopy, averaged 4.2C in the warm day regime and -1.4C in the cool day regime. The average daily temperature was lower (16.9C) in the warm day regime than in the cool day regime (18.7C).DIF treatment significantly affected final leaf area, leaf and total plant dry weight, leaf area ratio and specific leaf weight, The DIF treatment by cultivar interaction was significant for final poinsettia leaf area, stem, leaf and total plant dry weight, break number and average break length. Uniconazole significantly affected final plant height, stem and total plant dry weight, break number, average break length and specific leaf weight. Uniconazole by DIF treatment effects were not significant,

Spur behavior in Almond trees (Prunus dulcis [Mill.] DAWebb): effects of flowers, fruit, and “June drop” on leaf area, leaf nitrogen, spur survival and return bloom

2017 ◽  
Vol 215 ◽  
pp. 15-19 ◽  
Author(s):  
Daniela Valdebenito ◽  
Sergio Tombesi ◽  
Aude Tixier ◽  
Bruce Lampinen ◽  
Patrick Brown ◽  
...  
Keyword(s):  
Leaf Area ◽  
Prunus Dulcis ◽  
Leaf Nitrogen ◽  
Almond Trees ◽  
Return Bloom ◽  
June Drop

scholarly journals Evaluation of agronomic performances of rainfed barley double-haploids (DHs) lines under semi-arid conditions

2019 ◽  
Vol 20 (5) ◽  
Author(s):  
LARBI KARKOUR ◽  
MOHAMMED FENNI ◽  
DALILA RAMLA ◽  
DJOUHER GAAD ◽  
ABDELKADER BENBELKACEM
Keyword(s):  
Leaf Area ◽  
Harvest Index ◽  
Arid Zone ◽  
Block Design ◽  
Environment Interaction ◽  
Specific Leaf Weight ◽  
Double Haploids ◽  
Arid Conditions ◽  
Leaf Weight ◽  
Semi Arid

Abstract. Karkour L, Fenni M, Ramla D, Gaad D, Benbelkacem A. 2019. Evaluation of agronomic performances of rainfed barley double-haploids (DHs) lines under semi-arid conditions. Biodiversitas 20: 1398-1408. Sixty-six doubled-haploid (DHs) barley lines derived from F2 plants of three bi-parental single crosses, between the local variety (Tichdrett) and three introduced genotypes (Express, Plaisant, and Exito) were evaluated in 2017 for agronomic performance. The experiment was undertaken at two locations under rainfed conditions in semi-arid zone of Algeria in a randomized block design with three replications. Each line was scored for fifteen quantitative traits: number of days to heading, thousand grains weight, number of grains per spike, spikes number per m2, plant height, spike length, leaf relative water content, awn length, peduncle length, spike weight, grain weight per spike, leaf area, specific leaf weight, grain yield and harvest index. The results indicated that the presence of highly significant genotype effect for all traits except for leaf area and highly significant environment effect for all characters, except spikes number per m2and awns length. Genotype x environment interaction was highly significant for all traits, except specific leaf weight and leaf area. Significant positive correlation between the twelve agronomic traits, ranging from 0.45 to 0.87, were observed among the number of grains per spike, thousand grains weight, the number of spikes per m2, yield of grains and harvest index. The principal component analysis showed that four components could describe 72% of total variances. Cluster analysis divided all genotypes studied into three cluster groups. Overall, results of agronomic parameters and those related to the biotic and abiotic stresses will be used for better identifying this germplasm and better-directing studies of genetic improvement.

scholarly journals Bell Pepper (Capsicum annum L.) Crop as Affected by Shade Level: Microenvironment, Plant Growth, Leaf Gas Exchange, and Leaf Mineral Nutrient Concentration

HortScience ◽  
2013 ◽  
Vol 48 (2) ◽  
pp. 175-182 ◽  
Author(s):  
Juan Carlos Díaz-Pérez
Keyword(s):  
Gas Exchange ◽  
Plant Growth ◽  
Soil Water ◽  
Leaf Area ◽  
Leaf Gas Exchange ◽  
Bell Pepper ◽  
Mineral Nutrient ◽  
Specific Leaf Weight ◽  
Leaf Weight ◽  
Leaf Transpiration

Use of shading nets helps ameliorate heat stress of vegetable crops. This study evaluated the effects of shade level on microenvironment, plant growth, leaf gas exchange, and mineral nutrient content of field-grown bell pepper crop. Bell pepper cultivars Camelot, Lafayette, Sirius, and Stiletto were grown at 0%, 30%, 47%, 62%, and 80% shade levels. Photosynthetically active radiation and air, leaf, and root zone temperatures decreased as shade level increased. Despite having increased plant leaf area, there was increased soil water content with increased shade level, indicating reduced soil water use. With increased shade level, the total plant leaf area, individual leaf area, and individual leaf weight increased, whereas leaf number per plant and specific leaf weight decreased. In contrast to non-normalized chlorophyll index (CI) values, CI normalized by specific leaf weight were related to leaf nitrogen (N) and increased with increased shade level. Net photosynthesis and stomatal conductance (gS) decreased and leaf transpiration increased with increased shade level, particularly above 47% shade level. Leaf concentrations of N, potassium (K), calcium (Ca), magnesium (Mg), manganese (Mn), sulfur (S), aluminum (Al), and boron (B) increased with increased shade level. Relatively few differences in plant growth, leaf gas exchange, and leaf mineral nutrient concentrations were observed among cultivars. In conclusion, morphological changes such as taller plants and thinner and larger leaves likely enhanced light capture under shaded conditions compared with unshaded plants. High shade levels reduced leaf temperature and excessive leaf transpiration but resulted in reduced leaf photosynthesis. Thus, moderate shade levels (30% and 47%) were the most favorable for bell pepper plant growth and function.

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