scholarly journals Foliar Application of Organic Compounds Stimulate Cotton (Gossypium barbadense L.) to Survive Late Sown Condition

2018 ◽  
Vol 3 (1) ◽  
pp. 684-697 ◽  
Author(s):  
Ayman El Sabagh ◽  
Abdelhamid M. Omar ◽  
Mohamed El Menshawi ◽  
Samir El Okkiah
Keyword(s):  
Organic Compounds ◽  
Foliar Application ◽  
Dry Weight ◽  
Sowing Date ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Quality Properties ◽  
Seed Cotton Yield ◽  
Sowing Dates ◽  
Late Sowing

Abstract Application of organic compounds in cotton balances its vegetative and reproductive growth, as well as to improve the seed cotton yield and lint quality properties. Field experiments were conducted with some organic compounds to determine their effects on cotton yield and quality properties of cotton under two sowing times.The experiment was conducted at Sakha Agricultural Research Station, Cotton Research Institute, Egypt in 2015 and 2016. In these studies, two sowing times viz. optimum and delay sowing and two levels (200 and 400 ppm) of organic compounds viz. ascorbic, ascobine and salicylic acids were used. The results indicated that the optimum sowing date gave the largest area of single leaf at 90 and 120 DAS, as well as it induced an increase in dry weight (g) of plant organs at 120 DAS, while, the late sowing significantly reduced the leaves dry weight both at 90 and 120 DAS. Both seed cotton yield and lint cotton yield (kentar feddan-1) were significantly increased in optimum sowing condition and sharply declined as delayed sowing date. The number of opened bolls plant-1 were also significantly reduced in late sowing. Lint percentage, seed index and seed cotton weight boll-1 were also significantly affected by sowing dates. Leaf pigment (total chlorophyll) was significantly affected by sowing date recorded at 90 and 120 DAS, while lower values of total chlorophyll was recorded in late sown plants. Also, sowing dates had no significant effect on both oil and protein seed content. This study has shown that timely sowing of cotton seed and foliar application of ascorbic acid, ascobine or salicylic acid with concentration of 200 or 400 ppm at flower initiation stage and peak of flowering stage had significant positive effects on seed cotton yield and lint quality properties. According to these results it can be suggested that usage of organic compounds to improve the yield and quality properties, especially in late sowing for ‘Giza 94' cotton cultivar at Kafr- Elsheikh district, Egypt.

Spotted Spurge (Euphorbia maculata) Interference with Cotton (Gossypium hirsutum)

Weed Science ◽  
1994 ◽  
Vol 42 (4) ◽  
pp. 553-555 ◽  
Author(s):  
Mohammad T. Bararpour ◽  
Ronald E. Talbert ◽  
Robert E. Frans
Keyword(s):  
Linear Relationship ◽  
Dry Weight ◽  
Field Studies ◽  
Yield Reduction ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Percent Reduction ◽  
Cotton Boll ◽  
Positive Linear Relationship ◽  
Seed Cotton Yield

Field studies were conducted from 1988 through 1990 in Fayetteville, AR, to measure competitiveness of spotted spurge in cotton. Population levels were established by transplanting seedlings from other field areas. There was a positive linear relationship between cotton boll numbers and seed cotton yield. Percent reduction in cotton height, leaf area, dry weight, boll numbers, and seed cotton yield increased as spotted spurge densities increased. Seed cotton yield reduction was 47, 57, and 85% for spotted spurge densities of 5, 10, and 50 spotted spurge plants m–1of row.

Growth Analysis of Cotton in Competition with Velvetleaf (Abutilon theophrasti)

2016 ◽  
Vol 30 (1) ◽  
pp. 123-136 ◽  
Author(s):  
Xiaoyan Ma ◽  
Jinyan Yang ◽  
Hanwen Wu ◽  
Weili Jiang ◽  
Yajie Ma ◽  
...  
Keyword(s):  
Field Experiments ◽  
Fiber Quality ◽  
Dry Weight ◽  
Growth And Yield ◽  
Effective Management ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Weed Density ◽  
Seed Cotton Yield ◽  
The Relationship

Field experiments were conducted in 2013 and 2014 to determine the influence of velvetleaf densities of 0, 0.125, 0.25, 0.5, 1, 2, 4, and 8 plants m−1of row on cotton growth and yield. The relationship between velvetleaf density and seed cotton yield was described by the hyperbolic decay regression model, which estimated that a density of 0.44 to 0.48 velvetleaf m−1of row would result in a seed cotton yield loss of 50%. Velvetleaf remained taller and thicker than cotton throughout the growing season. Both cotton height and stem diameter reduced with increasing velvetleaf density. Moreover, velvetleaf interference delayed cotton maturity, especially at velvetleaf densities of 1 to 8 plants m−1of row, and cotton boll number and weight, seed numbers per boll, and lint percentage were also reduced. Fiber quality was not influenced by weed density when analyzed over 2 yr; however, fiber length uniformity and micronaire were adversely affected in 2014. Velvetleaf intraspecific competition resulted in density-dependent effects on weed biomass, ranging from 97 to 204 g plant−1dry weight. Velvetleaf seed production per plant or per square meter was indicated by a logarithmic response. At a density of 1 plant m−1of cotton row, velvetleaf produced approximately 20,000 seeds m−2. The adverse impact of velvetleaf on cotton growth and development identified in this study have indicated the need for effective management of this species when the weed density is greater than 0.25 to 0.5 plant m−1of row and before the weed seed maturity.

scholarly journals Response of different Bt cotton (Gossypium hirsutum L.) hybrids to canopy modification practices

2016 ◽  
Vol 8 (3) ◽  
pp. 1188-1197
Author(s):  
Amit Kaul ◽  
J. S. Deol ◽  
A. S. Brar
Keyword(s):  
Plant Height ◽  
Growth Regulation ◽  
Foliar Application ◽  
Field Investigation ◽  
Bt Cotton ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Area Index ◽  
Seed Cotton Yield ◽  
Verse Effect

A field investigation was carried out to characterize the growth and development of Bt cotton hybrids by detopping and use of plant growth retardants during the rainy (kharif) season of 2011 and 2012. The experimental site had loamy sand soils with normal in reaction. The experiment (split plot) involved three Bt cotton hybrids (MRC 7017, MRC 7031 and RCH 314) in main plots and growth regulation treatments (Mepiquat chloride (MC) @ 300 ppm, 2, 3, 5-tri iodo benzoic acid (TIBA) @ 100 ppm and Maelic hydrazide (MH) @ 250 ppm) in sub plots with four replications. Hybrid MRC 7017 produced significantly higher (p<0.01) seed cotton yield which was attributed to the maximum number of sympodial branches plant-1, total number of flowers and picked bolls plant-1. Application of MC @ 300 ppm, TIBA @ 100 ppm and MH @ 250 ppm reduced plant height, leaf area index and total dry matter accu-mulation than control. Detopping treatment significantly (p<0.01) reduced plant height than control but attained more plant height than all the PGRs. MC @ 300 ppm, TIBA @ 100 ppm and MH @ 250 ppm at 80 days after sowing had beneficial effect on seed cotton yield. Detopping done at 80 days after sowing failed to influence the seed cotton yield dur-ing both the years. The results revealed that foliar application of MC @ 300 ppm yielded more seed cotton by improv-ing the setting percentage and therefore, increased number of picked (open) bolls plant-1 without exhibiting any ad-verse effect on quality traits.

Response of sowing dates and bio regulators on yield of clusterbean under current climate in alley cropping system in eastern U.P., India

2018 ◽  
Author(s):  
Hemraj Meena ◽  
Ram Swaroop Meena ◽  
Rattan Lal ◽  
Gulab Singh Yadav ◽  
Tarik Mitran ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Seed Yield ◽  
Alley Cropping ◽  
Foliar Application ◽  
Growth Parameters ◽  
Foliar Spray ◽  
Cropping System ◽  
Sowing Date ◽  
Sowing Dates ◽  
Late Sowing

The impacts on yields of cluster bean were assessed for normal (15 July) and late (30 July) sowing environments and foliar spray of thiourea (500, 1000 ppm) and salicylic acid (50, 100 ppm) at 45 and 60 days after sowing (DAS).Significantly higher yield parameters, yield, economics, protein content and nutrient uptake were recorded with foliar spray of thiourea at 500 ppm as compared to all other bio regulator sprays. Similarly, spray of salicylic acid at 100 ppm enhanced yield and other growth parameters which were statistically at par with those for thiourea 500 ppm foliar spray at 45 and 60 DAS. The data show that the foliar application of bio regulators at normal sowing date enhances seed yield of clusterbean by improving the physiological processes. The interaction effects were significant between the sowing date and bio-regulators on the seed yield. The highest seed yield of 993 and 845 kg/ha was obtained with foliar spray of thiourea at 500 ppm in normal and late sowing, respectively, while the lowest yield of 775 and 769 kg/ha was obtained for the water spray control in normal and late sowing, respectively.

scholarly journals Differential Response of Cotton Growth, Yield and Fiber Quality to Foliar Application of Spirulina platensis and Urea Fertilizer

2020 ◽  
pp. 29-40
Author(s):  
Youssef G. Yanni ◽  
Amany A. Elashmouny ◽  
Abdelgawad Y. Elsadany
Keyword(s):  
Plant Growth ◽  
Spirulina Platensis ◽  
Foliar Application ◽  
Foliar Spray ◽  
Growth Yield ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Urea Fertilizer ◽  
Seed Cotton Yield ◽  
Seed Index

Aims: Evaluation if foliar spray of destructed cells of Spirulina platensis along with urea fertilizer can contribute to cotton (Gossypium barbadense L. cultivar Giza-94) plant growth, contents of photosynthetic pigments, seed cotton yield, seed index, earliness, lint percent, fineness (Micronair) and strength (Pressely). Study Design: Application of ascending rates of N fertilizer in 3 mainplot treatments and foliar spray with destructed cells of Spirulina platensis in 4 subplot treatments (Contained a non-treated control), with 3 replications. Place and Duration of Study: The Departments of Microbiology and Cotton Research, Sakha Agricultural Research Station, Kafr Elsheikh, Egypt (31º18′30″N & 30º48′14″E) during the two cotton cultivation seasons of years 2016 and 2017. Methodology: Urea (46% N) at 96, 144 or 192 kg N/ha was applied in two equal doses as main-plot treatments. Spirulina platensis was grown and total proteins, contents of 16 amino acids and Fe, K, Mn and P of dried destructed cells were determined and used for foliar application in the rates of 6, 12 or 18 g cells/ha, used as sub-plot treatments. Area of each replicated sub-plot was 12.5 m2. Calcium super phosphate (15% P2O5), potassium sulphate (48% K2O) and Insecticides (when necessary) were supplemented as common treatments.  Results: Application of destructed Spirulina increased the plant leaf area, chlorophyll a, b, carotenoids and gibberellin contents, plant height, fruiting branches, open bolls/plant, seed cotton yield and seed index after ginning, fiber length, fineness (Micronair) and strength (Pressely) comparing to the corresponding non-sprayed plants. Urea at 192 kg N/ha along with destructed Spirulina exhibited superiority as enhancers of plant growth, yield and fiber qualities. Conclusion: The dual N/Spirulina combination expressed enhanced cotton growth, yield and qualities of fibers. The tested fertilization strategy is promising for enhanced cotton production economy.

Economic Analysis of Parawilt Management in Bt-Cotton (Gossypium hirsutum L.) in Mansa District of South-western Punjab, India

2022 ◽  
Vol 58 (1) ◽  
pp. 93-96
Author(s):  
Gurdeep Singh ◽  
Pritpal Singh ◽  
Kulwant Singh ◽  
Gurjinder Pal Singh Sodhi ◽  
Bhallan Singh Sekhon
Keyword(s):  
Gossypium Hirsutum ◽  
Cobalt Chloride ◽  
Foliar Application ◽  
Bt Cotton ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Economic Returns ◽  
Gossypium Hirsutum L ◽  
Physiological Disorder ◽  
Seed Cotton Yield

Parawilt characterized by a sudden drooping of leaves followed by death of plants withinfew hours after rainfall or heavy irrigation has been the major physiological disorder affectingproductivity of Bt-Cotton (Gossypium hirsutum L.). We studied the effect of foliarapplication of cobalt chloride (@10 mg L-1 water) within 24-36 hours after appearance ofsymptoms on recovery rate, seed cotton yield and economics at farmers’ fields in Mansadistrict of south-western Punjab. The results of front line demonstrations revealed thatfoliar application of cobalt chloride resulted in significantly (p<0.05) higher seed cottonyield by ~9.1 per cent, compared with the control (no-spray). The mean gross returns(MGRs) increased significantly by Rs. 9620/- ha-1 in the demonstration plots. The higherbenefit-cost (B:C) ratio of 2.38 was observed for the demonstration plots, against 2.15 forthe control (no-spray). The foliar application of cobalt chloride resulted in higher averageproduction efficiency of 1.1 kg seed cotton yield ha-1 d-1 and average economic efficiencyof Rs. 65.7 ha-1 d-1, compared with the control. These results therefore, revealed that farmerscan effectively manage parawilt in Bt-cotton using foliar application of cobalt chloride andmay increase seed cotton yield and economic returns.

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