Nitrogen nutrition and photosynthesis in leaves of Pima cotton<sup>1</sup>

Reddy, A. Ramachandra; Reddy, K. R.; Padjung, Rusnadi; Hodges, H. F.

doi:10.1080/01904169609365158

Cited by 77 publications

(63 citation statements)

References 31 publications

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“…This may be partially due to enhanced photosynthetic activity [2]. Similar findings were obtained by Palomo Gil and Chávez González [32]; Hamed et al [47].…”

Section: Analyzed Data For Measurementssupporting

confidence: 79%

“…Palomo Gil and Chávez González [32] applied N at a rate ranging from 40 to 200 kg·ha −1 to cotton plants and found highest yield was associated with high rates of applied N. Similar results were obtained by Sarwar Cheema et al [33] Saleem et al [46] when N was applied at 120 kg·ha −1 ; Hamed et al [47] when N was applied up to 178 kg·ha −1 . Nitrogen is an important nutrient which control growth and prevents abscission of squares and bolls, essential for photosynthetic activity [2] and stimulate the mobilization and accumulation of metabolites in newly developed bolls and thus their number and weight are increased. All tested PGR (Pix, Cycocel and Alar) significantly increased seed yield ha −1 (7.79% -12.08%), compared with the untreated control.…”

Section: Discussionmentioning

confidence: 99%

“…This may be due to increased photosynthetic activity that increases accumulation of metabolites, with direct impact on seed weight. Reddy et al [2], in a pot experiment under natural environmental conditions, where 20-day old cotton plants received 0, 0.5, 1.5 or 6 mM NO 3 , found that, net photosynthetic rates, stomatal conductance and transpiration were positively correlated with leaf N concentration. Similar findings were reported by Palomo et al [96], when N was applied at 40 -200 kg·ha −1 ; Ali and El-Sayed [97], when N was applied at 95 to 190 kg·ha −1 ; Hamed et al [47] when N was applied up to 178 kg·ha −1 .…”

Section: Effects N K and Pgr On Oil Content Andmentioning

confidence: 99%

“…In cotton culture, nitrogen (N), has a necessity role in production inputs, which controls growth and prevents abscission of squares and bolls, essential for photosynthetic activity [2], and stimulates the mobilization and accumulation of metabolites in newly developed bolls, thus increasing their number and weight. Additionally, with a dynamic crop like cotton, excess N serves to delay maturity, promote vegetative tendencies, and usually results in lower yields [3].…”

Section: Nitrogenmentioning

confidence: 99%

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Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

Sawan¹

2014

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The increase in the population in Egypt makes it imperative to explore promising approaches to increase food supply, including protein and oil, to meet the needs of the Egyptian people. Cotton is the principal crop of Egyptian agriculture, it is grown mainly for its fiber, but cottonseed products are also of economic importance. Cottonseed is presently the main source of edible oil and meal for livestock in Egypt. Economic conditions in modern agriculture demand high crop yields in order to be profitable and consequently meet the high demand for food that comes with population growth. Oil crop production can be improved by development of new high yielding varieties, and the application of appropriate agronomic practices. There is limited information about the most suitable management practice for application of N, P, K, Zn, Ca and PGRs in order to optimize the quantity and quality of oil and protein of cottonseed. In maximizing the quantity and quality of a crop's nutritional value in terms of fatty acids and protein, field experiments were conducted to investigate the effect of nitrogen, phosphorus, potassium, foliar application of zinc and calcium, the use of plant growth retardants (Pix, Cycocel or Alar), on cottonseed, protein, oil yields, and oil properties of Egyptian cotton. From the findings of this study, it seems rational to recommend that application of N, P, K, foliar application of Zn and Ca, the use of PGRs (Pix, Cycocel or Alar), could bring about better impact on cottonseed yield, seed protein content, oil and protein yields, oil refractive index, unsaponifiable matter, and unsaturated fatty acids in comparison with the ordinary cultural practices adopted by Egyptian cotton producers.

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“…This may be partially due to enhanced photosynthetic activity [2]. Similar findings were obtained by Palomo Gil and Chávez González [32]; Hamed et al [47].…”

Section: Analyzed Data For Measurementssupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Effects N K and Pgr On Oil Content Andmentioning

confidence: 99%

Section: Nitrogenmentioning

confidence: 99%

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Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

Sawan¹

2014

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“…Each treatment was divided into three replications of 10 plants per replication. The Hoagland's nutrient solution was modified substituting CaCal 2 for Ca(NO 3 ) 2 to allow the different N concentration (Reddy et al, 1996). It was also modified to obtain the different levels of P and K as required by the treatments.…”

Section: Treatmentsmentioning

confidence: 99%

Effects of Nitrogen, Phosphorus and Potassium Levels on Kenaf (Hibiscus cannabinus L.) Growth and Photosynthesis under Nutrient Solution

Hossain¹,

Musa²,

Talib³

et al. 2010

JAS

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To date, little is known about the effect of levels of nitrogen, phosphorus and potassium on kenaf grown in nutrient solution culture. The objective of the present study was to examine the effects of different nitrogen, phosphorus and potassium levels on kenaf growth such as diameter, plant height, leaf number, root dry weight, stem dry weight and leaf dry weight and physiology like chlorophyll content, photosynthesis and stomatal conductance. Treatment consisted of 5 different levels of nitrogen viz. 0, 50, 100, 200 and 400 mg/L and 5 different levels of phosphorus and potassium viz. 0, 25, 50, 100 and 200 mg/L replicated thrice in a completely randomized design in a shade house. Growth (diameter, plant height and leaf number), chlorophyll content and photosynthesis were measured once weekly and plant components biomass was measured, 28 DAT. Different levels of nitrogen, phosphorus and potassium had significant effects on all the parameters studied. The highest values for diameter, plant height, leaf number, root dry weight, stem dry weight, leaf dry weight, photosynthesis and stomatal conductance were obtained from 200N, 100P and 100K whereas values decreased with further increase in levels of nutrient concentration. All the growth rates, chlorophyll content and photosynthesis declined with lower level of nitrogen, phosphorus and potassium. Among the plant components, leaf dry weight had the greatest decrease while root/shoot ratio increased under N deficiency. The results of this study provide new knowledge to produce kenaf with better nutrient management in the field.

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Developing functional relationships between sesame growth, development, and nitrogen nutrition during early season

Sehgal

Smith

Walne

et al. 2021

Agrosystems Geosci & Env

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Plants, being sessile, are subjected to multiple environmental stresses of varying intensity throughout their life cycle. Among the stresses, low fertility, drought, salinity, and nonoptimal temperatures limit crop productivity worldwide. Functional relationships between leaf N and crop growth are prerequisites to developing management tools that optimize productivity in the field. An outdoor pot-culture experiment was conducted to determine the relationship between leaf N and sesame (Sesamum indicum L.) growth and development. Plants were grown in pots filled with fine sand and irrigated with full-strength Hoagland's nutrient solution until 10 d after sowing (DAS). Five N treatments were then imposed: one treatment of full-strength Hoagland's nutrient solution (control, 100% N), and four reformulations of Hoagland's nutrient solution containing reduced N at 60, 20, 10, and 0% of the control. Treatments were maintained until plants were harvested at 31 DAS. Growth, including several root traits, photosynthesis, and leaf N were measured at the end of the experiment. Maximum values were achieved at 5.3% leaf N in the leaves except for transpiration rate, stomatal conductance, and root/shoot ratio. Even though all growth rates declined with lower leaf N, the leaf area expansion among shoot and root volume among the root growth traits were most sensitive to leaf N. Among the root developmental traits, number of root tips was more sensitive to leaf N than other parameters. Among the plant dry components, leaf dry weight had the most considerable decrease. The root/shoot ratio increased under N deficiency. These N stress response indices and critical leaf N levels for various growth processes will help model and manage sesame crops in the field.

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Nitrogen nutrition and photosynthesis in leaves of Pima cotton¹

Cited by 77 publications

References 31 publications

Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

Effects of Nitrogen, Phosphorus and Potassium Levels on Kenaf (Hibiscus cannabinus L.) Growth and Photosynthesis under Nutrient Solution

Developing functional relationships between sesame growth, development, and nitrogen nutrition during early season

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Nitrogen nutrition and photosynthesis in leaves of Pima cotton1

Cited by 77 publications

References 31 publications

Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

Effects of Nitrogen, Phosphorus and Potassium Levels on Kenaf (Hibiscus cannabinus L.) Growth and Photosynthesis under Nutrient Solution

Developing functional relationships between sesame growth, development, and nitrogen nutrition during early season

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Nitrogen nutrition and photosynthesis in leaves of Pima cotton¹