scholarly journals Comparative Productivity and Seed Nutrition of Cotton by Plant Growth Regulation under Deficient and Adequate Boron Conditions

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
A. ZOHAIB ◽  
A. JABBAR ◽  
R. AHMAD ◽  
S.M.A. BASRA
Keyword(s):  
Plant Growth ◽  
Nutritional Quality ◽  
Growth Regulation ◽  
Nutrient Dynamics ◽  
Growth Stages ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Mepiquat Chloride ◽  
Seed Cotton Yield

ABSTRACT: Plant growth regulators (PGRs) potentially improve the productivity and nutritional quality of crops through modulation of morphology, physiology and nutrient dynamics within plants. However, the effect of PGRs may differ under environments with deficient and adequate nutrients. Here the role of mepiquat chloride (MC) on the yield and seed nutritional quality of cotton was explored under boron (B) deficiency and adequate conditions in a two-year field study. Mepiquat chloride was foliar-applied at different dosages (0 and 70 mg L-1) and growth stages (squaring and flowering) and B was applied into soil (0, 1, 1.5, 2 and 2.5 kg ha-1) to establish B deficiency and adequate levels. Seed cotton yield and seed nutritional quality were substantially higher under adequate B conditions, compared to B deficiency. Nonetheless, MC applications improved the seed cotton yield, seed oil yield, seed protein yield and concentration of seed mineral nutrients (N, P, K, B, Zn and Fe except for Mn) under both B deficiency and adequate conditions. Nonetheless, the improvement in all traits caused by MC application was greater under adequate B conditions (2-2.5 kg ha-1 B), compared to B deficiency conditions. Furthermore, the application of MC at squaring proved more beneficial in improving the seed cotton yield and nutritional quality, compared to the flowering stage. In conclusion, MC application improves seed cotton yield and cotton seed nutritional quality under both deficient and adequate B conditions, through an improved nutrient accumulation in seed tissues; however, the efficacy of MC is affected by B deficiency.

scholarly journals Response of Cotton Varieties to the Stage of Topping under Rainfed Condition of Bardiya, Nepal

2006 ◽  
Vol 27 ◽  
pp. 165-168 ◽  
Author(s):  
KB Basnet
Keyword(s):  
Block Design ◽  
Growth Stages ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Rainfed Condition ◽  
Seed Cotton Yield ◽  
Significant Difference ◽  
The Difference ◽  
The Impact ◽  
Different Growth Stages

A field experiment was conducted to study the impact of topping at different growth stages (3-4, 6-7, 9-10 and 12-13 sympodial branches) on productivity of two (Tamcot SP-37 and H-777) cotton varieties under rainfed condition at the Kumbher Farm (Bardiya district) of Cotton Development Board in 1995. The experiment was laid out in a Randomized Complete Block Design with four replications. The interaction effect between variety and stages of topping showed that significantly higher yield (1.23 t/ha) was produced by topping plants at the stage of 12-13 sympodial banches of the variety Tamcot SP-37 as compared to all other treatments. At all stages of topping the yield produced by Tamcot SP-37 was significantly higher than H-777. The average seed cotton yield (1.03 t/ha) of Tamcot SP-37 was significantly higher than that of H- 777 (0.71 t/ha) and the difference in yield was 45.0%. The seed-cotton yield increased from 0.75 to 1.00 t/ ha with the postponed of topping from 3-4 to 12-13 sympodial branches, but significant difference was recorded between late (12-13 sympodial branches) and early (3-4 and 6-7 sympodial branches) stages of topping. Thus, for rainfed condition of Bardiya Tamcot SP-37 was a suitable variety with 12-13 sympodial branches as an appropriate stage of topping for sustainable production of cotton. Key words: Variety, topping, sympodial branches. J. Inst. Agric. Anim. Sci. 27:165-168 (2006)

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.

scholarly journals Soil applied potassium improves productivity and fiber quality of cotton cultivars grown on potassium deficient soils

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0250713
Author(s):  
Shabir Hussain ◽  
Hakoomat Ali ◽  
Syed Tahir Raza Gardezi
Keyword(s):  
Growth Parameters ◽  
Abiotic Factors ◽  
Fiber Quality ◽  
Bt Cotton ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Seed Cotton Yield ◽  
K Fertilizer ◽  
Improper Use

Cotton (Gossypium hirsutum L.) is considered as the most valuable cash crop of Pakistan. During last decade, its yield has been declined due to various biotic and abiotic factors. Among abiotic factors, improper use of fertilizers is considered very important specially regarding plant defense and yield. This study was conducted to evaluate the effect of different levels (0, 40, 80 and 120 kg ha-1) of K fertilizer (K2O) on different growth parameters of two commercial Bt cotton cultivars (CYTO-301 and IUB-2013) and one non-Bt cultivar (CYTO-142) during 2016 and 2017. Maximum plant height (124–134 cm), dry matter contents (915–1005%), fruiting point (441–462), bolls per plant (96–139), average boll weight (4.2–5.2 g) and seed cotton yield (2524–3175 kg ha-1) and minimum shedding (43–73%) were observed in plots receiving highest dose of K (120 kg ha-1). The CYTO-103 cultivar was found more responsive to K fertilizer as compared to rest of cultivars (CYTO-142 and IUB-2013). Concluding, ideal dose of fertilizer is very important (120 kg ha-1 in our case) for optimum growth and production of good quality fiber with enhanced seed cotton yield.

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.

scholarly journals EFFECT OF PLANT SPACINGS ON GROWTH YIELD AND LINT QUALITY OF FIVE COTTON CULTIVARS

2016 ◽  
Vol 47 (1) ◽  
Author(s):  
Al-Naqeeb & Askar
Keyword(s):  
Block Design ◽  
Growth Yield ◽  
Lint Yield ◽  
Cotton Yield ◽  
Seed Cotton ◽  
College Of Agriculture ◽  
Seed Cotton Yield ◽  
Randomized Block Design ◽  
Two Factors

A Field experiment was conducted at the experimental field ,Department of field Crop ,College of Agriculture /University of Baghdad during summer season 2014.In order to study the effect of plant spacings on growth yield and lint qualities. The study included two factors, the first was varieties (Coker 310 , Marsum 1, Lashata , Ashur and Abu Ghraib 5 ) as whole plots , The second factor was spacing between plants with three level (20 , 25 and 30) cm as sub plots, Using complete randomized block design under split plots with four replications. The results showed significant differences between varieties in most  studied characteristic. Coker 310 gave highest average for seed cotton yield and lint cotton yield, 1457.00 and 439.13 kg ha-1 due to gave highest average in number of open bolls 8.93 boll plant-1as well as gave best average of lint length 27.98 mm, lint strength 21.54 gm tex-1. Ashur var. gave lowest average of seed cotton yield and lint cotton yield, 1120.32 and 370.64 kg ha-1 respectively, lint length 27.40 mm, Micronaire 3.29 and lint strength 19.68 gm tex-1. The Abu –Ghraibs var. gave best average after Coker 310 var. for all   characterise comparing with the other varieties. It was superior  of seed cotton yield and lint yield. Varieties  planted on 20 cm distance between hill gave significantly superior in the average  boll weight, 3.63 gm ,seed cotton yield, 1364.85 kg ha-1 ,lint yield, 432.13 kg ha-1, While The varieties  plants on 30 cm distance was significantly superior in plant height, 146.15 cm, Sympodial  number(15.21) plant-1,  and number of open boll ( 8.99 boll plant-1).It can be recommended to cultivate coker310 with 30 cm distance to get the best result.

Cover Crops Suppression of Palmer Amaranth (Amaranthus palmeri) in Cotton

2017 ◽  
Vol 32 (1) ◽  
pp. 60-65 ◽  
Author(s):  
Matheus G. Palhano ◽  
Jason K. Norsworthy ◽  
Tom Barber
Keyword(s):  
Cover Crops ◽  
Cover Crop ◽  
Field Experiments ◽  
Palmer Amaranth ◽  
Cotton Yield ◽  
Cotton Production ◽  
Seed Cotton ◽  
Cereal Rye ◽  
Seed Cotton Yield ◽  
Weed Emergence

AbstractWith the recent confirmation of protoporphyrinogen oxidase (PPO)-resistant Palmer amaranth in the US South, concern is increasing about the sustainability of weed management in cotton production systems. Cover crops can help to alleviate this problem, as they can suppress weed emergence via allelochemicals and/or a physical residue barrier. Field experiments were conducted in 2014 and 2015 at the Arkansas Agricultural Research and Extension Center to evaluate various cover crops for suppressing weed emergence and protecting cotton yield. In both years, cereal rye and wheat had the highest biomass production, whereas the amount of biomass present in spring did not differ among the remaining cover crops. All cover crops initially diminished Palmer amaranth emergence. However, cereal rye provided the greatest suppression, with 83% less emergence than in no cover crop plots. Physical suppression of Palmer amaranth and other weeds with cereal residues is probably the greatest contributor to reducing weed emergence. Seed cotton yield in the legume and rapeseed cover crop plots were similar when compared with the no cover crop treatment. The seed cotton yield collected from cereal cover crop plots was lower than from other treatments due to decreased cotton stand.

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