scholarly journals 238 Seed Size Effects on Brassica Transplant Production

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 432B-432
Author(s):  
Warley M. Nascimento
Keyword(s):  
Leaf Area ◽  
Seed Size ◽  
Seed Quality ◽  
Seedling Emergence ◽  
Root Weight ◽  
Primary Method ◽  
Control Seed ◽  
Original Seed ◽  
Seed Conditioning ◽  
Shoot Weight

The growing of transplants in plug cell trays is the primary method of producing brassica transplants in many countries. Seed quality is an important aspect to achieve success in transplant production. Seed size may affect seed performance, seedling growth and development of brassica transplants. Seeds of cauliflower (`Vitoria de vero') and cabbage (`Unio') from Embrapa Vegetables were used in this study. During seed conditioning, seeds were classified using round screens generating three (>1.5, 1.5-2.0, and 2.0-2.5 mm) and four (>1.5, 1.5-2.0, 2.0-2.5, and < 2.5 mm) seed size categories, for cauliflower and cabbage, respectively. The original seed lot was used as control. Seed weight increased with seed size. Seed germination (laboratory) and seedling emergence (greenhouse) were not affected by seed size. In both species, root and shoot weight, and leaf area, measured 30 days after seeding, in greenhouse conditions, increased with seed size. Also, transplants from larger seed size resulted in a significantly higher root weight, shoot weight, and leaf area relative to the original (control) seeds. The results indicate that, overall, an adequate seed conditioning improve brassica transplant quality.

Effect of Interspecific Interference, Light Intensity, and Soil Moisture on Soybean (Glycine max), Common Cocklebur (Xanthium strumarium), and Sicklepod (Cassia obtusifolia) Water Uptake

Weed Science ◽  
1993 ◽  
Vol 41 (4) ◽  
pp. 534-540 ◽  
Author(s):  
Ronald E. Jones ◽  
Robert H. Walker
Keyword(s):  
Soil Moisture ◽  
Light Intensity ◽  
Leaf Area ◽  
Water Uptake ◽  
Root Weight ◽  
Pressure Potential ◽  
Unit Leaf Area ◽  
Unit Leaf ◽  
Shoot Weight ◽  
The Relationship

Greenhouse and growth chamber experiments with potted plants were conducted to determine the effects of interspecific root and canopy interference, light intensity, and soil moisture on water uptake and biomass of soybean, common cocklebur, and sicklepod. Canopy interference and canopy plus root interference of soybean with common cocklebur increased soybean water uptake per plant and per unit leaf area. Root interference with soybean decreased common cocklebur water uptake per plant. Canopy interference of soybean with sicklepod increased soybean water uptake per unit leaf area, while root interference decreased uptake per plant. Combined root and canopy interference with soybean decreased water uptake per plant for sicklepod. Soybean leaf area and shoot weight were reduced by root interference with both weeds. Common cocklebur and sicklepod leaf area and shoot weight were reduced by root and canopy interference with soybeans. Only common cocklebur root weight decreased when canopies interfered and roots did not. The relationship between light intensity and water uptake per unit leaf area was linear in both years with water uptake proportional to light intensity. In 1991 water uptake response to tight was greater for common cocklebur than for sicklepod. The relationship between soil moisture level and water uptake was logarithmic. Common cocklebur water uptake was two times that of soybean or sicklepod at −2 kPa of pressure potential. In 1991 common cocklebur water uptake decreased at a greater rate than soybean or sicklepod in response to pressure potential changes from −2 to −100 kPa.

scholarly journals Nitrogen, Phosphorus, and Potassium Nutrition Increases Growth and Total Polyphenol Concentrations of Bush Tea in a Shaded Nursery Environment

2007 ◽  
Vol 17 (1) ◽  
pp. 107-110 ◽  
Author(s):  
Fhatuwani N. Mudau ◽  
Puffy Soundy ◽  
Elsa S. du Toit
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Block Design ◽  
Limpopo Province ◽  
Root Weight ◽  
Total Polyphenol ◽  
Phosphorus And Potassium ◽  
Shoot Weight ◽  
Number Of Branches ◽  
Leaf N

The objective of this investigation was to determine the effects of simultaneous applications of nitrogen (N), phosphorus (P), and potassium (K) nutrition on growth and chemical analysis of bush tea (Athrixia phylicoides). Four consecutive trials were conducted at Morgenzon (Louis Trichardt, Limpopo Province, South Africa), a commercial nursery, one at each season (autumn, winter, spring, and summer) under 50% shade. Treatments comprised three levels of N (300, 350, 400 kg·ha−1), three levels of P (250, 300, 350 kg·ha−1), and three levels K (150, 200, 250 kg·ha−1). The experimental design was a 3 × 3 × 3 factorial experiment arranged in a randomized complete-block design with four replications. Parameters recorded were plant height, number of branches and leaves, fresh and dry stem weight, fresh and dry root weight, stem girth, fresh and dry shoot weight, leaf area, and percent concentration of leaf and root tissue N, P, K, and total polyphenol concentrations as influenced by season in a shaded nursery environment. Treatment combinations of N and P at rates of 300 kg·ha−1 and K at 200 kg·ha−1 increased fresh and dry shoot weight, number of leaves, leaf area, and concentration of total polyphenols. Other treatments did not consistently affect concentrations of leaf N, P, or K during the study period, although the treatment that received combinations of N and P at rates of 300 kg·ha−1 and K at 200 kg·ha−1 always had the highest concentrations of leaf N, P, and K and lowest root N, P, and K concentrations. No differences in plant height, number of branches, number of flower buds (autumn and winter), stem girth, fresh and dry root weight, and fresh and dry stem weight due to treatment combinations were observed.

scholarly journals Efficacy of different substrates to formulate Trichoderma harzianum against seedling disease of cabbage

2019 ◽  
Vol 44 (1) ◽  
pp. 127-138
Author(s):  
MI Faruk
Keyword(s):  
Rice Bran ◽  
Wheat Bran ◽  
Trichoderma Harzianum ◽  
Seedling Emergence ◽  
Root Weight ◽  
Grass Pea ◽  
Seedling Disease ◽  
Shoot Weight ◽  
Rot Disease ◽  
The Individual

Efficacy of three different substrates viz. rice bran, wheat bran, grass pea bran and their combination along with or without Mustard oilcake (MOC) were tested to formulate Trichoderma harzianum based bio-fungicides for the management of seedling disease (Fusarium oxysporum) of cabbage in seedbed. All combinations of substrates were equally suitable for mass culturing and preparing of T. harzianum bio-fungicides and all the substrates based T. harzianum bio-fungicides were effective in increasing seedling emergence and reducing pre-emergence and post-emergence mortality of cabbage seedling under F. oxysporum inoculated seedbed soils. The shoot length, shoot weight, root length and root weight of cabbage seedling were enhanced significantly by the application of different substrates based T. harzianum bio-fungicides under F. oxysporum inoculated soil under seedbed conditions. The individual (rice bran, wheat bran, grasspea bran) and combination of substrates (rice bran + wheat bran, rice bran + grasspea bran, rice bran + Mustard oilcake, rice bran + wheat bran + MOC and wheat bran + grass pea bran + MOC) were equally suitable to formulate effective T. harzianum based bio-fungicides for the management of foot and root rot disease of cabbage seedling in seed bed condition. Bangladesh J. Agril. Res. 44(1): 127-138, March 2019

Germination and seedling establishment in cashew (Anacardium occidentale L.): An interaction between seed size, relative growth rate and seedling biomass

2017 ◽  
Vol 45 (2) ◽  
pp. 110
Author(s):  
Babli Mog, J.D. Adiga M.G. Nayak and G.S. Mohana
Keyword(s):  
Leaf Area ◽  
Seed Size ◽  
Seedling Establishment ◽  
Seedling Survival ◽  
Seedling Emergence ◽  
Seed Mass ◽  
Germination Percentage ◽  
Mass Ratio ◽  
Unit Leaf ◽  
Seedling Biomass

<p>Seeds of cashew were used to determine the effect of seed mass (5.2 to 7.8 g) on germination, seedling emergence and growth<br />under nursery conditions. Germination percentage and germination time showed significant correlation with seed mass. Large<br />sized seeds had higher germination percentage (81.6%) and produced more vigorous seedlings. Per cent seedling emergence was<br />related to seed mass with large sized seeds exhibited faster emergence. Seed mass significantly affected seedling survival and<br />survival rate was high in seedlings arising from large sized seeds (62.9%). Seedling vigor expressed in terms of shoot and root<br />length, leaf number, leaf area and total dry matter was significantly affected by seed mass. Seedlings that emerged from large sized<br />seeds showed better growth and produced heavier seedlings as compared to medium sized seeds. RGR showed significant variation<br />(0.152 to 0.240 g g-1day-1) among two seed size classes positively correlated with seed mass, leaf area (LA), unit leaf rate per unit<br />leaf area (ULRM), root to shoot ratio (R/S) and root mass ratio (RMR) and negatively with stem mass ratio (SMR). The study<br />concluded that the seed mass and RGR have influence on seedling growth and success of seedling establishment in cashew.</p>

scholarly journals EFFECTS OF SEED SIZE ON LIMA BEAN GROWTH AND DEVELOPMENT

HortScience ◽  
1993 ◽  
Vol 28 (4) ◽  
pp. 274D-274
Author(s):  
Jim E. Wyatt ◽  
Marla C. Akridge
Keyword(s):  
Leaf Area ◽  
Seed Size ◽  
Seedling Emergence ◽  
Lima Bean ◽  
Treatment Temperature ◽  
Weight Class ◽  
Size Classes ◽  
Bean Seedling ◽  
Chilling Period ◽  
Percent Normal

Objectives of this study were to determine the effects of lima bean seed size differences and a short chilling period after planting on seedling emergence rate, seedling abnormalities and vigor. Individual seeds of 'Jackson Wonder' lima bean were weighed and placed into one of five size classes: 24-33. 36-41. 44-49, 52-57, and 60-73 g per 100 seed. Seed of each size class were germinated at a constant 23-26C or chilled at 8C for 24 hrs and then moved to 23-26C conditions for the remainder of the study. A 24 hr chilling period after planting had a detrimental effect on subsequent lima bean seedling emergence only from 8 through 11 days after planting. Plant fresh and dry weights were significantly less for the chilled seed treatment. Temperature treatments had no effect on percent normal and abnormal seedlings or primary leaf area. No differences in seedling emergence number or rate were found among seed size classes. Smaller seedclasses had significantly fewer normal and more abnormal seedlings than larger seed size classes. The largest seed class produced seedlings with about two times more fresh and dry weights and leaf area than those from the smallest seed weight class. Plant fresh and dry weights and leaf areas from all seed size classes were significantly different from each other.

Interference between Mayweed Chamomile (Anthemis cotula) and Pea (Pisum sativum) is Affected by Form of Interference and Soil Water Regime

Weed Science ◽  
1994 ◽  
Vol 42 (4) ◽  
pp. 579-585 ◽  
Author(s):  
Alex G. Ogg ◽  
Randall H. Stephens ◽  
David R. Gealy
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Leaf Area ◽  
Soil Nitrogen ◽  
Soil Water Potential ◽  
High Water ◽  
Root Weight ◽  
Replacement Series ◽  
Below Ground ◽  
Shoot Weight

Effects of root-shoot interference, soil water regimes, and soil nitrogen were evaluated to determine aggressivity for pea relative to mayweed chamomile in the greenhouse using replacement series experiments. Interference between pea and mayweed chamomile occurred mainly below ground, and soil water was more important than soil nitrogen in controlling the outcome of interference. Pea was a stronger competitor than mayweed chamomile under all conditions investigated. Leaf area, root weight, and shoot weight of mayweed chamomile were reduced 55 to 87% by full interference and 27 to 60% by root only interference from pea. Full interference from mayweed chamomile for 53 days after planting released the remaining pea from intraspecific interference and it grew 80% larger and produced 100% more pod weight compared to a pea in monoculture. Low soil water potential (–175 kPa) compared to high water potential (–33 kPa) reduced the height, leaf area, and shoot weight of pea in 1:1 mixtures, but had no effect on mayweed chamomile. Decreasing soil water increased the aggressivity of mayweed chamomile relative to pea. Nitrogen added at 20 mg wk-1compared to no added nitrogen had no effect on peas, but more than doubled the size of mayweed chamomile in monoculture and in mixtures with pea. Added nitrogen did not increase the aggressivity of mayweed chamomile relative to pea.

scholarly journals Silicon (Si) and salinity stress on the agronomic performances of bok choy (Brassica rappa L.) in an Entisols

2020 ◽  
Vol 17 (2) ◽  
pp. 108
Author(s):  
Kharisun Kharisun ◽  
Mochammad Nazarudin Budiono ◽  
Nur Prihatiningsih ◽  
Ratri Noorhidayah ◽  
Ningsih Lamorunga
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Salinity Stress ◽  
Stress Conditions ◽  
Root Weight ◽  
Plant Weight ◽  
Fresh Plant ◽  
Number Of Leaves ◽  
Shoot Weight ◽  
Fresh Root

Silicon is a beneficial nutrient that has the potential to alleviate the abiotic stress of bok choy grown under salinity stress on entisols. Indonesia has wide areas of entisol soils along its coastline, which could be planted with bok choy. However, salinity conditions pose a problem in entisol soils. The objective of this research was to evaluate the effect of silicon on the agronomic performance of bok choy grown on an Entisols under salinity stress conditions. This research was conducted at the screen house of the Faculty of Agriculture, Jenderal Soedirman University, from May to August 2019. The experimental design was a completely randomized completely block design (RCBD) consisting of 16 treatments with three replications. The treatments comprised two factors: the dosage of silicon fertilizer, which was 0, 5, 10, or 15 g pot<sup>-1</sup>; and salinity stress, with a level of 0, 1, 2, or 3 dS m<sup>-1 </sup>pot<sup>-1</sup>. Observed variables included plant height (cm), number of leaves (strands), leaf area (cm<sup>2</sup>), fresh shoot weight (g), dry shoot weight (g), fresh root weight (g), dry root weight (g), fresh plant weight (g), and dry plant weight (g). The results showed that the provision of silicon (Si) fertilizer from zeolite and sugarcane bagasse compost (SCB) improved plant height, number of leaves, leaf area, fresh plant weight, and dry plant weight of bok choy plants under salinity stress conditions on entisol soil. At a silicon dosage of 10 g pot<sup>-1</sup>, fresh plant weight (production of bok choy) was 64.18% greater compared to the control. Increasing soil salinity up to 3 dS m<sup>-1</sup> of soil decreased the plant height and number of leaves but did not significantly affect fresh shoot weight, dry shoot weight, fresh plant weight, dry fresh plant weight, fresh root weight, or dry root weight.

scholarly journals EFEITO DO TAMANHO DAS SEMENTES SOBRE A EMERGÊNCIA E MORFOFISIOLOGIA DE MUDAS DE MAMA CADELA

Nativa ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 260-265
Author(s):  
Thales Augusto Ferreira Querioz ◽  
Daniela Pereira Dias
Keyword(s):  
Leaf Area ◽  
Seed Size ◽  
Dry Matter ◽  
Seedling Emergence ◽  
Initial Growth ◽  
Total Leaf Area ◽  
Specific Leaf Mass ◽  
Total Leaf ◽  
Emergence Percentage ◽  
Chlorophyll Index

O objetivo deste estudo foi avaliar a emergência de plântulas e a morfofisiologia de mudas de mama-cadela (Brosimum gaudichaudii Trécul) produzidas a partir de sementes de diferentes tamanhos. Foram determinadas a porcentagem de emergência de plântulas e as características morfofisiológicas das mudas (altura, diâmetro do colo, índice de robustez, espessura foliar, índice de clorofila, biomassa seca, massa foliar específica - MFE e área foliar total). A emergência iniciou-se após 21 dias da semeadura e atingiu, ao final do experimento, 84% para as sementes pequenas, valor inferior ao das sementes médias e grandes (94 e 90%, respectivamente). Em 60 dias, as mudas apresentavam, em média, 2,53 mm de diâmetro e 12,81 cm de altura. Nos primeiros 30 dias, as mudas formadas a partir de sementes pequenas tinham alturas menores que as demais. O tamanho das sementes não afetou o diâmetro do colo e a espessura das folhas durante o crescimento inicial das mudas, assim como para os parâmetros morfofisiológicos estudados. Ao longo de 120 dias, houve aumento do conteúdo de clorofilas, biomassa seca, área foliar total, exceto para a MFE. O tamanho das sementes afeta a emergência e a altura das mudas de mama-cadela após 30 dias após a emergência. Palavras-chave: Brosimum gaudichaudii; Cerrado; crescimento inicial.   Effect of seed size on emergence and mophophysiology of mama-cadela seedlings   ABSTRACT: The objective of this study was to evaluate the seedling emergence and morphophysiology of mama-cadela (Brosimum gaudichaudii Trécul) seedlings produced from seeds of different sizes. Seedling emergence percentage and seedling morphophysiological characteristics (height, diameter, slenderness index, leaf thickness, chlorophyll index, dry matter, specific leaf mass - MFE and total leaf area) were determined. The emergence started after 21 days of sowing and reached, at the end of the experiment, 84% for small seeds, lower than the average and large seeds (94 and 90%, respectively). In 60 days, the seedlings had, on average, 2.53 mm in diameter and 12.81 cm in height. In the first 30 days, seedlings formed from small seeds had shorter heights than the others. The seeds size did not affect the diameter and the leaves thickness during the initial growth of the seedlings, as well as for the morphophysiological parameters studied. Over the 120 days, there was an increase in the content of chlorophylls, dry matter, total leaf area, except for MFE. The seeds size affects the emergence and the height at 30 days after mama-cadela seedlings emergence. Keywords: Brosimum gaudichaudii; Brazilian savanna; initial growth.

scholarly journals Relationship of Black Vine Weevil Egg Density and Damage to Two Cranberry Cultivars

HortScience ◽  
2012 ◽  
Vol 47 (6) ◽  
pp. 755-761
Author(s):  
Betsey Miller ◽  
Denny J. Bruck ◽  
Vaughn Walton
Keyword(s):  
Leaf Area ◽  
Water Use ◽  
Shoot Length ◽  
Root Weight ◽  
Plant Water ◽  
Root Damage ◽  
Plant Water Use ◽  
Egg Density ◽  
Black Vine Weevil ◽  
Shoot Weight

Black vine weevil (BVW), Otiorhynchus sulcatus (Coleoptera: Curculionidae, Fabricius), is a serious pest of cranberry, Vaccinium macrocarpon Ait. Larvae feed undetected within the soil and cause damage to roots and underground vines. We correlated damage caused by feeding larvae from known BVW egg densities. Two cultivars of potted cranberry vines, ‘Stevens’ and ‘McFarlin’, were inoculated with 0, 5, 10, 20, 40, and 80 eggs per pot. Root damage and canopy health were assessed. ‘Stevens’ exceeded ‘McFarlin’ in dry shoot weight, total shoot length, total leaf area, and dry root weight before egg treatments. Damage to underground vines increased with increasing egg density and more damage was found in ‘Stevens’ than ‘McFarlin’ at the highest egg densities. In August, plant water use and total shoot length in ‘McFarlin’ were significantly greater in plants treated with 0–5 eggs per pot compared with plants treated with 40–80 eggs per pot. The effect on total shoot length was more pronounced in October. ‘Stevens’ showed no response to increasing BVW density for up to 24 weeks. Destructive measurements showed decreased root weight in ‘McFarlin’ but not ‘Stevens’. Both cultivars showed a similar decrease in dry shoot weight, total shoot length, and percent green leaf area with increasing BVW egg density. Root damage increased as BVW egg density increased and this damage resulted in reduced plant water use for ‘McFarlin’. Reduced shoot growth and leaf area was recorded for both cultivars, although these effects were more apparent in ‘McFarlin’ and at an earlier stage than in ‘Stevens’.

scholarly journals Effect of Storage Conditions on Seed Viability of China Aster [Callistephus chinensis (L.) Nees]

2021 ◽  
Vol 10 (10) ◽  
pp. 385-401
Author(s):  
B. Vaidya P. B. Sable ◽  
V. B. Patil
Keyword(s):  
Seed Germination ◽  
Field Condition ◽  
Seed Quality ◽  
Seed Viability ◽  
Storage Conditions ◽  
Quality Parameters ◽  
Root Weight ◽  
Ambient Conditions ◽  
China Aster ◽  
Shoot Weight

The study revealed that China aster seeds lose viability quickly if stored under ambient conditions. At the end of 12th months, seeds stored at refrigerated condition (5-70C) still maintained high seed germination (64.00%) at field condition well above the minimum seed certification standards. However, in case of ambient storage very drastic reduction in seed germination was observed. It was 32.43 % for first months and reduced to 14.95 % for second month by declining 53.90% as compared to first month and thereafter no germination was recorded at field condition. Results from the interaction effect indicated that previously stored seeds of China aster for six months in aluminium foil and kept under refrigerated condition recorded higher seed quality parameters viz. percent seed germination at field (92.67 and 72.00%), percent survival of seedlings (89.33 and 70.67%), height of seedling (11.53 and 8.60 cm), shoot length (7.00 and 5.10 cm), root length (4.53 and 3.50 cm), shoot weight (0.42 and 0.33 g), root weight (0.040 and 0.027 g), root:shoot ratio (0.095 and 0.082) and percent seed germination at laboratory (97.33 and 76.00%) for first and sixth month, respectively.

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