Performance of cotton crop grown under surface irrigation and drip fertigation. I. Seed cotton yield, dry matter production, and lint properties

2001 ◽  
Vol 32 (19-20) ◽  
pp. 3045-3061 ◽  
Author(s):  
Mussaddak Janat ◽  
George Somi
Keyword(s):  
Dry Matter ◽  
Dry Matter Production ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Surface Irrigation ◽  
Cotton Crop ◽  
Seed Cotton Yield ◽  
Matter Production ◽  
Drip Fertigation

scholarly journals Weed control via intercropping with gliricidia: I. cotton crop

2009 ◽  
Vol 27 (1) ◽  
pp. 97-104 ◽  
Author(s):  
P.S.L. Silva ◽  
J.C.V. Silva ◽  
L.P. Carvalho ◽  
K.M.B. Silva ◽  
F.C.L. Freitas
Keyword(s):  
Weed Control ◽  
Dry Matter ◽  
Chemical Pollution ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Weed Species ◽  
Seed Cotton Yield ◽  
Fiber Yield ◽  
Poaceae Family ◽  
Uniform Manner

The majority of cotton grown commercially in the world has white lint, but recently, there has been a growing interest in colored lint cotton in several countries, including Brazil. The use of naturally-colored fiber reduces chemical pollution. The objective of this paper was to evaluate cotton cultivar fiber yield in response to weed control via intercropping with gliricídia. Cultivars BRS-Verde (greenish fibers), BRS-Rubi (reddish brown fibers), BRS-Safira (brown fibers), and BRS-187 8H (white fibers) were submitted to the following treatments: no hoeing, two hoeings (at 20 and 40 days after transplanting), and cotton intercropped with gliricídia. In the intercropped treatment, gliricídia was planted between rows of cotton plants, using one seedling pit-1, in pits spaced 50.0 cm apart. Twelve weed species predominated in the experiment, many of them belonging to the Poaceae family. Weeds occurred at different frequencies and in a non-uniform manner in the experimental area. Cultivars did not influence weed dry matter. Intercropping with gliricídia reduced weed dry matter but did not prevent reductions in cotton fiber and seed cotton yield, which were higher in hoed plots. Cultivar BRS Safira had the highest fiber yield, but no differences were observed between cultivars regarding to seed cotton yield.

The seasonal growth characteristics of irrigated cotton in a dry monsoonal environment

1965 ◽  
Vol 16 (3) ◽  
pp. 347 ◽  
Author(s):  
WR Stern
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Growth Rates ◽  
Dry Matter ◽  
Seasonal Effect ◽  
Cotton Yield ◽  
Seasonal Growth ◽  
Seed Cotton ◽  
Area Index ◽  
Seed Cotton Yield

Cotton plantings were made at the Kimberley Research Station (128° 36´ E., 15° 42´ S.) from September to July to give overlapping growth curves extending from September 1961 to December 1962. Crop growth was examined in relation to radiation and temperature. Beginning at the third week from sowing, each planting was sampled 12 times at intervals of 15 days. At each sampling, dry matter, leaf area index, number and dry weight of bolls, and seed cotton yield were determined. The development of total dry matter and leaf area index showed a strong seasonal trend. The number of bolls produced was less in the late plantings, and the seed cotton yield was correspondingly lower. The highest seed cotton yields and the highest ratios of seed cotton to total dry matter (30%) were obtained with January–February plantings. The growth rates between 50 and 100 days were used to analyse seasonality; the highest seasonal growth rate was 164 mg dm-2 day-1 in December–January and the lowest value was zero in early September. By using fitted harmonics, a multiple correlation was established between maximum and minimum temperatures and growth rates 30 days later. Potential rates of net photosynthesis of tops were calculated from observed radiation data with the use of the de Wit model and with allowance for light wastage, root growth, and respiration. There was good agreement between observed and potential growth rates from December to April. Midday stomatal apertures declined from November to May, and this appeared to be a seasonal effect. An annual pattern for the diffusive resistance of carbon dioxide through the leaf surface into the substomatal cavities is calculated. Radiation did not appear to be the primary limiting factor, and the seasonal growth pattern was interpreted in terms of the composite effect of maximum and minimum temperatures on extension growth, stomatal opening, and the presence or absence of suitable sinks for carbohydrates. Growth rates are evaluated against rates observed elsewhere, and means of exploiting the Kimberley environment are discussed.

scholarly journals Dry matter production and macronutrient leaf composition in lettuce under fertigation with nitrogen, potassium and silicon

2015 ◽  
Vol 19 (12) ◽  
pp. 1166-1171 ◽  
Author(s):  
Renan S. de Souza ◽  
Roberto Rezende ◽  
Paulo S. L. de Freitas ◽  
Antonio C. A. Gonçalves ◽  
Graziela S. Rezende
Keyword(s):  
Dry Matter ◽  
Dry Matter Production ◽  
Control Treatment ◽  
Matter Production ◽  
Leaf Accumulation ◽  
Leaf Composition ◽  
Lettuce Cultivar ◽  
Leaf Fertilizer ◽  
Different Doses ◽  
Drip Fertigation

ABSTRACT The objective of this study was to evaluate, in greenhouse, the response of the lettuce cultivar 'Vera', with respect to the marketable shoot dry matter production and macronutrient accumulation, as a function of the application of different doses of nitrogen (N) and a potassium silicate-based leaf fertilizer. The lettuce was cultivated from August 10, 2012 (sowing) to October 16, 2012 (harvest). The experimental design was completely randomized with three replicates, referring to nine treatments, resulting from the combination between top-dressing doses of N (9, 54, 90, 126 and 171 kg ha-1) and Si/K2O (1.15, 6.90, 11.50, 16.10 and 21.85 kg ha-1), using the Plan Puebla III experimental matrix, and a control treatment without fertigation. Drip fertigation was used for the application of the doses. The highest doses of N and Si/K2O resulted in the highest marketable shoot dry matter production and highest leaf accumulation of magnesium, calcium, potassium and phosphorus.

Competition of Spurred Anoda, Velvetleaf, Prickly Sida, and Venice Mallow in Cotton

Weed Science ◽  
1977 ◽  
Vol 25 (2) ◽  
pp. 151-158 ◽  
Author(s):  
J.M. Chandler
Keyword(s):  
Dry Matter ◽  
Abutilon Theophrasti ◽  
Cotton Yield ◽  
Seed Cotton ◽  
Hibiscus Trionum ◽  
Matter Production ◽  
Competition Period ◽  
Sida Spinosa ◽  
Prickly Sida ◽  
Anoda Cristata

Spurred anoda [Anoda cristata(L.) Schlecht.], velvetleaf (Abutilon theophrastiMedic), prickly sida (Sida spinosaL.) and Venice mallow (Hibiscus trionumL.) competition in cotton (Gossypium hirsutumL. ‘Stoneville 213′) was studied during 1973 and 1974. Cotton height was reduced by full-season competition of all species at a density greater than 32 plants/12 m of crop row. Full-season cotton competition reduced the dry matter production of velvetleaf, spurred anoda, prickly sida, and Venice mallow at weed densities less than 8, 16, 32, or 64 plants/12 m of crop row, respectively. Full-season competition resulted in seed cotton yield reductions by spurred anoda, velvetleaf, and prickly sida at 8, 16, and 64, plants/12 m of crop row, respectively. Competition from 2 weeks after cotton emergence until harvest by spurred anoda at 16 plants/12 m, and velvetleaf or prickly sida at 64 plants/12 m, reduced yields. Spurred anoda, velvetleaf, or prickly sida competition 4 to 6 weeks after cotton emergence until harvest did not reduce the seed cotton yields. Venice mallow competition did not reduce yields at any density or competition period.

scholarly journals The Effects of Flood, Drought, and Flood Followed by Drought on Yield in Cotton

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 555
Author(s):  
Long Qian ◽  
Xiaohong Chen ◽  
Xiugui Wang ◽  
Shuang Huang ◽  
Yunying Luo
Keyword(s):  
Climate Change ◽  
Water Stress ◽  
Harvest Index ◽  
Dry Matter ◽  
Dry Matter Yield ◽  
Cotton Yield ◽  
Yield Losses ◽  
Seed Cotton ◽  
Seed Cotton Yield ◽  
Scheduling Irrigation

Cotton suffers from alternations of flood and drought in China. A lysimeter trial was conducted to investigate the responses of various cotton yield indices under water-stress treatments including, flood (five-day, eight-day), drought (10-day, 15-day), and five-day flood followed by 10-day drought, during the flowering and boll-forming stage. The results showed that the seed cotton yield was significantly (p < 0.05) reduced under all water-stress treatments, while the harvest index was not affected under any treatment. Significant decreases in dry matter yield, boll number, and boll hull mass were detected under flood treatments but not under drought treatments. The percentage cotton yield losses per day induced by flood and drought were 6.22% and 2.48%, respectively. Under water stress, the associations between seed cotton yield and relevant yield indices were weakened, but yield losses were still strongly related to the decreases in dry matter yield and boll number. Flood followed by drought caused significant reductions in all yield indices except harvest index; however, the reduction was much lower than the additive reductions induced by flood and drought. These results provide bases for scheduling irrigation and drainage under climate change.

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