scholarly journals Effect of Chilling and Accumulative Photo-Thermal Units on Flowering of Strawberry (Fragaria × ananassa Duch.)

2018 ◽  
Vol 26 (2) ◽  
pp. 25-35
Author(s):  
Isam A.H. Al-Madhagi ◽  
Mahassen Al-Munibary ◽  
Manssur Al-Doubibi
Keyword(s):  
Block Design ◽  
Planting Date ◽  
Stepwise Multiple Regression ◽  
Thermal Unit ◽  
Flower Opening ◽  
Randomized Complete Block Design ◽  
Chilling Period ◽  
Chilling Hours ◽  
Two Stages ◽  
Early Flower

AbstractThe influence of chilling period hours and accumulative photo-thermal unit at different base temperatures, 10, 11, 13, 15, and 18 °C, on the flowering of strawberry was examined in Sana’a University-Yemen during two seasons: 2006 and 2007. The randomized complete block design (RCBD) field experiment was designed with 5 chilling hours (CHs) periods (0, 360, 750, 1080, and 1440 CHs under 2 ± 1 °C), with four replicates each. Accumulative photo-thermal unit (PTU) was calculated for every treatment at different base temperatures for two stages: (i) from planting date to the flower opening (THA) and (ii) from planting date until the end of 2 months (THB). The results revealed that the plants treated with 1080 h of chilling produced flowers with about 55.12% and 61.97% earlier when compared with control (without chilling) in both the seasons, respectively. Stepwise multiple regression analysis showed that both CHs and the accumulative PTU THA13 (in the first season) and CH plus THA10 (in the second season) have significant effect on days until flower opening, in which the majority effect was related to the chilling period. The effect of chilling period and accumulative PTU at 18 °C (THB18) had s significant influence (p < 0.05) on the number of early flower per plant, with about r2 = 0.250 and r2 = 0.536 in both the seasons, respectively, and r2 = 0.531 and r2 =0.740 for the total effect of both CH and THB18, respectively. However, the exposure of plants to the long period of chilling (1080 and 1440 h) led the plants to produce runners and break up the flowering stage after 9 and 11 weeks in both the seasons, respectively. Meanwhile, plants that received 360-h chilling produced significantly highest (p < 0.05) total number of flowers (24.83 per plant), with about 71.2% higher than that produced by control plants. Moreover, in the second season, plants treated with 750-h chilling produced the significantly higher total number of flowers per plant, with about 50.3% higher than that of the control. Meanwhile, the 360-h and 750-h chilling periods have similar effect on the number of flowers per plant in the second season. The result showed that the starch level in the crown significantly positively correlated with the days to flower opening (r2 = 0.415, p = 0.05) and negatively correlated with the number of early flower (r2 = 0.587, p = 0.01). The data from this study might be used for the management of strawberry production.

scholarly journals Post-emergence selectivity of metribuzin to carrot

Revista CERES ◽  
2018 ◽  
Vol 65 (4) ◽  
pp. 314-320
Author(s):  
Núbia Maria Correia ◽  
Agnaldo Donizete Ferreira de Carvalho
Keyword(s):  
Plant Growth ◽  
Chemical Treatment ◽  
Growth Stage ◽  
Block Design ◽  
Greenhouse Experiment ◽  
Application Time ◽  
Application Timing ◽  
Time Of Application ◽  
Randomized Complete Block Design ◽  
Two Stages

ABSTRACT When selecting a weed chemical treatment (herbicide, product mixtures, dose, or application timing), an important issue to consider is its selectivity to the crop of commercial interest. The objective of this study was to evaluate the selectivity of the herbicide metribuzin to carrot plants as a function of genotype, dose, and plant growth stage at the time of application. Two experiments were carried out, one in a greenhouse and another in the field. The greenhouse experiment was arranged in a completely randomized, 5 x 2 x 3 factorial design, with four replications. Metribuzin doses (0, 72, 96, 144, and 192 g ha-1) were sprayed on plants with 2-3 and 4-5 true leaves of the cultivars Maestro, BRS Planalto, and Verano. Cultivar Maestro was cultivated in the field in a 2 x 5 factorial experiment in randomized complete block design, with four replications. Carrot plants, at two stages of development (2 and 5 true leaves), were sprayed with the same doses of metribuzin applied in the greenhouse experiment. Metribuzin, regardless of application time and dose tested, was selective for cultivars BRS Planalto and Verano (greenhouse) and Maestro (both greenhouse and field), without reduction in quality and yield of roots.

scholarly journals The use of hydrogen cyanamide or nitrogen fertilizer increases vegetative and productive performance of fig cv. Roxo de Valinhos

2021 ◽  
Vol 43 ◽  
pp. e50519
Author(s):  
Jackson Mirellys Azevedo Souza ◽  
Marcelo de Souza Silva ◽  
Rafael Augusto Ferraz ◽  
Joyce Helena Modesto ◽  
Rafael Bibiano Ferreira ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Block Design ◽  
Branch Length ◽  
Plant Production ◽  
Productive Performance ◽  
Hydrogen Cyanamide ◽  
Paulo State ◽  
Randomized Complete Block Design ◽  
Chilling Hours ◽  
Fruit Mass

Some plants do not demand a lot of chilling hours, but methods to overcome dormancy promote more vigorous and productive plant. This study aimed to assess hydrogen cyanamide and nitrogen fertilizer with different concentration to growth and production in ‘Roxo de Valinhos’ fig tree. Two crop cycles (2015/2016 and 2016/2017) was performed in São Manuel city, São Paulo State, Brazil. Phenological and productive data was evaluated in a 2 x 5 factorial (Product x Concentration), organized in randomized complete block design, with three trees by plot. The factor products had as level hydrogen cyanamide and nitrogen fertilizer and the factor concentrations was constituted by 0, 1, 2, 3, and 4%. Furthermore, the following data was evaluated: number of days for budbreak, number of buds per plant, harvest period, branch length and diameter, leaf number, leaf area, number of fruits per plant, fruit mass, production and yield. Results indicated that both products anticipated the sprouting and promoted a higher number of buds overcome the dormancy. Plant production was higher in both cycles when the products were used (2.1 and 2.7, respectively). At last, hydrogen cyanamide showed better outcomes due to the higher number of fruits and production.

scholarly journals 2,4-D Hormesis Effect on Soybean

2019 ◽  
Vol 37 ◽  
Author(s):  
J.R.O. SILVA ◽  
J.N.R. MARQUES ◽  
C.V.C. GODOY ◽  
L.B. BATISTA ◽  
A.A. SILVA ◽  
...  
Keyword(s):  
Block Design ◽  
Quadratic Model ◽  
Soybean Seeds ◽  
Grain Number ◽  
Crop Development ◽  
Randomized Complete Block Design ◽  
Hormesis Effect ◽  
Two Stages ◽  
Higher Doses ◽  
Time Of Harvest

ABSTRACT: The hormesis effect of 2,4-D, applied at two stages of soybean development, on the physiological components of crop yield, was investigated. Soybean seeds of the cultivar ‘AG 3680 IPRO’ were sown in pots containing 7 L of a substrate and kept in a greenhouse. A randomized complete block design with four replicates was used. Eighteen treatments were tested, arranged in a split-plot scheme. The plots consisted of two stages of herbicide application (V4 and V6), and the split-plots were arranged by nine 2,4-D doses (0, 5, 10, 15, 20, 25, 30, 40, and 50 g ha-1). At the time of harvest, 100 days after sowing, significant interactions between crop development stages and 2,4-D doses were observed for the number of nodes in the main stem (NNMS) and the number of pods per plant (NPP). Both NNMS and NPP were not affected by 2,4-D during V6, but they increased with doses up to 20.2 g ha-1 and 22.5 g ha-1, respectively, during V4 and declined at higher doses according to a quadratic model, thus characterizing hermetic effect. Regardless of the application stage, the number of grains per plant and weight of a thousand grains were reduced as doses increased. However, the grain number and grain mass per plant reached maximum values for doses of 20.3 g ha-1 and 12.9 g ha-1, respectively. It was concluded that 2,4-D causes hormesis effects on the soybean crop ‘AG 3680 IPRO’ pot-grown in greenhouse conditions, regardless of the application stages herein tested.

scholarly journals Varietas Cabai Hias AYESHA IPB

2018 ◽  
Vol 2 (1) ◽  
pp. 49
Author(s):  
Muhamad Syukur ◽  
Sobir . ◽  
Awang Maharijaya ◽  
Syarifah Iis Aisyah ◽  
Dewi Sukma ◽  
...  
Keyword(s):  
Fruit Set ◽  
Block Design ◽  
Fruit Color ◽  
Ornamental Plant ◽  
Qualitative And Quantitative ◽  
Round Shape ◽  
Quantitative Characters ◽  
Randomized Complete Block Design ◽  
Biochemical Compound ◽  
Early Flower

Cabai (Capsicum annuum L.) have various in fruit shapes, fruit colors, fruit types, hot tasty and biochemical compound useful for fresh fruit, spicy and ornamental plant. Ornamental chili ideotype that are dwarf, high fruit set and various fruit colors. The aim this study to improve description characters in Ayesha IPB variety, both qualitative and quantitative characters. The testers are 4 released varieties and 5 the other genotypes in randomized complete block design for 4 replication in green house at Leuwikopo field reserch in Darmaga, Bogor. Ayesha IPB variety showed early flower in 13-16 days after planting, harvesting for commercial bucket in 65-70 days after planting, medium plant high that is 25.218 cm, medium canopy width that is 46-53 cm, good performance in canopy, round shape on fuit tip, various fuit colors that are  yellow green for young fruit, orange for intermediate fuit and orange red for mature of fruit. Those description characters could be ornamental chili for Ayesha, so it is important to protect the plant for ornamental plant commercialization.Key word : fruit, color, red,  round, orange, ornamental

INFLUENCE OF PLANTING DATE ON `CHANDLER' STRAWBERRY PRODUCTION

HortScience ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 436a-436
Author(s):  
W.K. Patterson
Keyword(s):  
Block Design ◽  
Planting Date ◽  
Planting Time ◽  
Randomized Complete Block Design

`Chandler' strawberries were planted on four dates to ascertain optimum planting time under central Arkansas conditions. Greenhouse-rooted plugs were planted in four replications in a randomized complete-block design. Each replication was planted in double rows 6 m long on beds with 1.4-m centers. Plots were established on 9/28, 10/7, 10/26, and 11/5. Number of branch crowns, yield, and number of runners/plant indicated that the earliest planting date was too late, and thus, the optimum date was missed. Equivalent yields of 16,173 kg·ha–1 were obtained from the earliest date, dropping to 8539 kg·ha–1 when planted 10 days later.

scholarly journals Effect of planting date on the growth, fibre and seed yield of Kenaf (Hibiscus cannabinus L) in Ibadan, South Western Nigeria

2020 ◽  
Vol 24 (10) ◽  
pp. 1711-1714
Author(s):  
S.O. Olanipekun ◽  
A.O. Togun
Keyword(s):  
Seed Yield ◽  
Field Experiments ◽  
Block Design ◽  
Planting Date ◽  
Hibiscus Cannabinus ◽  
Yield Potential ◽  
Randomized Complete Block Design ◽  
Fibre Yield ◽  
The One ◽  
June July

Planting of kenaf usually commences from March - April as these months mark the onset of the rainy season in Nigeria. On the contrary, it is now difficult for anyone to predict when rain start due to climatic variation. Hence, field experiments was conducted between 2015 and 2016 to determine the appropriate time of sowing kenaf that will optimize its yield potential in South Western Nigeria. As a result of delay in the commencement of rain, planting did not start until May. Hence, kenaf seeds were sown in May, June, July and August at 30 days interval in each year. The experiment was a 4 × 2 factorial laid out in a randomized complete block design and replicated three times. The result indicated that the highest fibre yield (1.00 t/ha) was from the kenaf sown in June irrespective of the year, but not significantly different from the one sown in July (0.98 t/ha). On the other hand, kenaf sown in July had the highest seed yield (2.28 t/ha) with the lowest seed yield (1.04 t/ha) obtained in May followed by August (1.19 t/ha). The experiment conclusively affirm June for sowing of kenaf for fibre cultivation and July for seed production. Keywords: Planting date, kenaf, fibre and seed yield

scholarly journals Utilization of Household Wasteas Liquid Organic Fertilizer on Shallot (Allium cepavar. ascalonicum (L.) Back).

AGRIFOR ◽  
2018 ◽  
Vol 17 (2) ◽  
pp. 249
Author(s):  
Eliyani . ◽  
Susylowati, Alvera Prihatini Dewi Nazari
Keyword(s):  
Organic Liquid ◽  
Block Design ◽  
Organic Fertilizer ◽  
Growth And Yield ◽  
Household Waste ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Two Stages ◽  
Number Of Bacteria

Utilization of household waste as organic fertilizeris an easy solution, cheap and effective because ithasvery largerole and benefits in terms of environment, sustainable agriculture/food security and socio-culture.  The research consisted of two stages: the first was makingorganic liquid fertilizer (OLF) of household waste, followed by laboratory analysis to know OLF quality with reference tominimum technicalrequirements of OLF and compound biochemical fertilizer based on Minister of AgricultureRegulation No. 70/Permentan/SR.140/2011 and the second was OLFapplicationon shallot Tuk Tuk variety.  The factorial experiment 2 x 3 was arranged in Randomized Complete Block Design with six times replication.  The first factor wasthe OLF dose, consisted of two levels:500 and 1 000 mL polybag-1, while the second was  OLFconcentration, consisted of three levels: 0, 50 and 100 mL L-1.  Data were analized by Analysis of Variance.The results showed that the OLF contained nutrients quite complete (total N and micro nutrients), negative pathogenE. coli and Salmonella sp., very low metalscontent and higher  number of fungi than minimum technical requiremnts ofOLF,  although  some parameters (total N, micro nutrients and number of bacteria) were lower.  The effect of dose, consentration of OLF and the interaction were not significantly difference on variables observed.The quality of organic liquid fertilizerof household waste was sufficient to meet therequirements of Minister of Agriculture Regulation.   A dose of 500 mL polybag-1witha concentration100 mL L-1tended to give abetter effect on the growth and yield of shallot bulb.

scholarly journals Exogenous gibberellic acid application influences on vegetative and reproductive aspects in gladiolus

2020 ◽  
Vol 26 (2) ◽  
pp. 244-250
Author(s):  
Abdur Rahman ◽  
Ibrar Hussain ◽  
Ghulam Nabi ◽  
Ziaullah
Keyword(s):  
Gibberellic Acid ◽  
Lower Cost ◽  
Block Design ◽  
Ornamental Plants ◽  
Growth And Yield ◽  
Lower Amount ◽  
Flower Opening ◽  
Randomized Complete Block Design ◽  
Two Factors ◽  
Number Of Leaves

Abstract Ornamental plants like gladiolus are suitable option for growers with lower amount of land, as they are highly economic and have lower cost of production. An experiment was conducted with aim to study the exogenous application influence of gibberellic acid on vegetative and reproductive characteristics of gladiolus was conducted under the subtropical conditions. The experiment was laid out in two factors randomized complete block design and replicated three times. Gibberellic acid (GA3) was used in different concentrations (0, 50, 100, 150, 200 mg L-1) to corms of two cultivars of gladiolus (‘White Prosperity’ and ‘Red Advance’). Results showed that most of the parameters were significantly influenced by gibberellic acid at 200 mg L-1. The maximum sprouting, number of leaves plant-1, daughter corms per plant, less number of days to corm sprouting, days to spike emergence and flower opening were recorded in plants treated with 200 mg L-1 gibberellic acid (GA3). ‘Red Advance’ produced more number of leaves plant-1, corm diameter, corm weight, and less number of days to spike emergence and flower opening. It can be concluded from the present findings that the treatment of corms with 200 mg L-1 gibberellic acid can improve the growth and yield of cultivar Red Advance than White prosperity under the subtropical conditions.

scholarly journals GROWTH AND YIELD RESPONSES OF TOMATO (LYCOPERSICON ESCULENTUM MILL.) UNDER DIFFERENT COMBINATIONS OF PLANTING TIMES AND FERTILIZERS

2020 ◽  
Vol 1 (2) ◽  
pp. 74-81
Author(s):  
Md. Eakub Ali ◽  
Md. Rezaul Karim ◽  
Fakhar Uddin Talukder ◽  
Md. Sohanur Rahman
Keyword(s):  
Block Design ◽  
Fruit Weight ◽  
Planting Date ◽  
Growth And Yield ◽  
Fertilizer Management ◽  
Planting Dates ◽  
Randomized Complete Block Design ◽  
Two Factors ◽  
Yield Responses ◽  
Different Doses

This experiment was conducted to study the influence of planting date and fertilizer management on the growth and yield of tomato cv Ratan. The experiment consisted of two factors; Factor A: three planting dates, viz. 20 October, 5 November, 20 November and Factor B: four different doses of fertilizer, viz., control; 100 kg urea + 75 kg TSP + 100 kg MOP/ha; 200 kg urea + 150 kg TSP + 200 kg MOP/ha and 300 kg urea +225 kg TSP + 300 kg MOP/ha were used in 12 treatment combinations. The experiment was laid out in randomized complete block design with three replications. Combined effects of planting date and fertilizer management exhibited significant variation on plant height at 30 DAT, 45 DAT, and 60 DAT, number of flowers per plant, number of mature fruits per plant, fruit diameter, weight of individual fruit, weight of fruits per plant, fruit yield per plot and fruit per hectare. The highest fruit yields per plot (23.94 kg) as well as per hectare (73.89 t) were achieved from the treatment combination of planting at 5 November with 200 kg urea + 150 kg TSP + 200 kg MOP/ha.

scholarly journals Variability of head diameter in sunflower hybrids depending on planting date

Genetika ◽  
2016 ◽  
Vol 48 (3) ◽  
pp. 983-990 ◽  
Author(s):  
Igor Balalic ◽  
Jovan Crnobarac ◽  
Sinisa Jocic ◽  
Vladimir Miklic ◽  
Velimir Radic ◽  
...  
Keyword(s):  
Block Design ◽  
Planting Date ◽  
Flowering Stage ◽  
Planting Dates ◽  
Head Diameter ◽  
Physiological Maturity ◽  
Study Results ◽  
Randomized Complete Block Design ◽  
Cropping Seasons ◽  
Number Of Seeds

Head size contributes substantially to seed yield of sunflower because it influences both number of seeds per head, and seed size. The aim of this field study was to determine the variability of head diameter in sunflower hybrids depending on planting date across three cropping seasons. Three hybrids (Miro, Rimi, Pobednik) were sown at four planting dates (PD1 - 20th of March, PD2 - 10th of April, PD3 - 30th of April, PD4 - 20th of May). Head diameter was analysed in the stage of flowering and physiological maturity. The trial was arranged as Randomized Complete Block Design (RCBD) with four replications. Analysis of variance (ANOVA) showed that the effect of year, hybrid, planting date and most interactions were highly significant for head diameter in the flowering stage. In the stage of physiological maturity head diameter varied significantly depending only on the planting date. Also, all interactions, except year ? hybrid (Y ? H), were highly significant. Planting date had significant influence on head diameter in the stage of flowering and physiological maturity in sunflower. With later sowing head diameter increased, so that significantly highest head diameter across planting dates was found in PD4 (11.8 cm in flowering stage, and 22.6 cm at the stage of physiological maturity). Study results may be helpful in the recommendation for optimal planting date in sunflower.

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