Morfologia de raízes e cinética de absorção de potássio em genótipos de arroz irrigado

Sanes, Fernanda San Martins; Castilhos, Rosa Maria Vargas; Scivittaro, W. B.; Vahl, Ledemar Carlos; Morais, Júlia Rodegheiro de

doi:10.1590/s0100-06832013000300015

Cited by 8 publications

(7 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These nutrients were available in a bigger amount to leaves, developing fundamental roles in physiological process of the plants and even leading to a morphological interference in vegetal tissues (SANES et al, 2013). By elevating the concentration of organic compounds in substrate of pepper, the stomata density was reduced ( Figure 5), demonstrating a negative correlation between the parameters (Table 4).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Production of Pepper Seedlings With Different Doses of Organic Compounds in Substrate

Lisboa

Cardoso²,

Narimatsu³

et al. 2020

NAT

View full text Add to dashboard Cite

One of the main responsible attributes for the good quality of seedlings is its cultivation in substrates with a good drainage and nutrients availability. This work aimed to study the production of pepper seedlings with different doses of organic compounds in substrate. The experiment was carried out in August, 2018, at Educational Foundation of Andradina, in Andradina, São Paulo State, Brazil. The experimental design was completely randomized, in a 2x5 factorial scheme, with two organic substrates: peaty exhausted compound (EC) and coconut fiber compound (CC), in five different concentrations: null %; 25%; 50%; 75% and 100%, with five repetitions, in total of fifty plots. The increase in the concentration of organic compounds in production of pepper seedlings promoted a greater development. It is recommended using 70% of peaty exhausted in the composition of substrate to the production of pepper seedlings and using 100% of coconut fiber in the composition of the substrate to the production of pepper seedlings.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Pepper (Capsicum annuum L.) is among the most produced vegetables in Brazilian olericulture (PORTO et al, 2018), its yield has conquered the market, in which new methods of production has been studied in order to increasing the production and facilitating cultivars treatments, demanding high quality seedlings (COSTA et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Production of Pepper Seedlings With Different Doses of Organic Compounds in Substrate

Lisboa

Cardoso²,

Narimatsu³

et al. 2020

NAT

View full text Add to dashboard Cite

show abstract

“…All genotypes extracted macronutrients in the following descending order: N > K > Ca > P > Mg > S (Table 3), at the following quantities: 250 kg ha -1 of N, 144 kg ha -1 of K, 99 kg ha -1 of Ca, 48 kg ha -1 of P, 38 kg ha -1 of Mg, and 22 kg ha -1 of S. Ravi et al (2008) found nutrient extraction order of N > K > S > P, with no data for Ca and Mg. Kumar et al (2015), evaluating extraction of N, P, K, confirmed that safflower extracted more K than N, followed by P. However, the soil in which the experiment was conducted had low levels of N and high levels of K. Anicésio et al (2015) observed that the accumulation of N in the plants increased linearly with the application of this nutrient into the soil, which varied from 0 to 480 kg ha -1 of N. The extraction and export of macronutrients, and requirements for macronutrients varied with genotype (Tables 3, 4 and 5). According to Borges et al (2009) and Sanes et al (2013), the variation in the kinetic parameters of nutrient absorption and the morphological differences of the root system make the differentiated absorption of nutrients quite common among cultivars of the same species, as verified by Erdal and Baydar (2005) and Murthy (2006) in safflower, by Jardini et al (2014) in sunflower, and Ludwig et al (2013) in gerbera-both species of the Asteraceae family, the same as safflower. The extraction of N differed statistically among genotypes (Table 3).…”

Section: Amounts Of Extracted Macronutrientsmentioning

confidence: 95%

Seed productivity, oil content and accumulation of macronutrients in safflower (Carthamus tinctorius L.) genotypes in subtropical region

Júnior¹,

Paschoal²,

Pereira³

et al. 2017

Aust J Crop Sci

View full text Add to dashboard Cite

The objective of this study was to evaluate eighteen genotypes of safflower and their absorption of macronutrients in an experiment conducted in the western region of the state of Paraná. The experiment was conducted under humid subtropical climate on Typic Hapludox soil with very clayey texture. The treatments were carried out in randomized blocks with four replications. The following traits were evaluated: shoot dry mass production, seed yield, shoot and seed macronutrient accumulation, and oil production. Data were submitted to analysis of variance and the means compared by Scott-Knott test at 5%. The mean seed yield was 4,531.8 kg ha -1 and the mean oil content was 26%. The descending order of safflower macronutrient uptake was N > K > Ca > P > Mg > S, in all genotypes, and macronutrient export was N > P > K > Mg > S > Ca. Mobility of macronutrients extracted from seeds was low for K and Ca, medium for Mg and S, and high for N and P. The genotypes with higher average yield were less efficient in their utilisation of nutrients.

show abstract

“…Chromosomal loci (QTL) affecting these traits in seedlings have been identified (Lynch 2007;Atkinson et al 2015;Kuijken et al 2015). When compared at low K supply, maize (Minjian et al 2007), rice (Jia et al 2008;Sanes et al 2013), wheat (Ehdaie et al 2010), potato (Trehan 2005), tomato Gabelman 1995, 2000), Chinese cabbage (Li et al 2015), and cotton (Yang et al 2011; Zia-ul-hassan and Arshad 2011) genotypes with larger roots have greater KUpE, and often faster growth and greater yields, than other genotypes. Similarly, enlarging the root system of rice by overexpressing the WUSCHEL-related homeobox gene WOX11 increased both K uptake and grain yield when K availability was low (Chen et al 2015).…”

Section: Root System Investment and Architecturementioning

confidence: 99%

Potassium Use Efficiency of Plants

White

Bell

Djalović

et al. 2020

Improving Potassium Recommendations for Agricultural Crops

View full text Add to dashboard Cite

There are many terms used to define aspects of potassium (K) use efficiency of plants. The terms used most frequently in an agricultural context are (1) agronomic K use efficiency (KUE), which is defined as yield per unit K available to a crop and is numerically equal to the product of (2) the K uptake efficiency (KUpE) of the crop, which is defined as crop K content per unit K available and (3) its K utilization efficiency (KUtE), which is defined as yield per unit crop K content. There is considerable genetic variation between and within plant species in KUE, KUpE, and KUtE. Root systems of genotypes with greatest KUpE often have an ability (1) to exploit the soil volume effectively, (2) to manipulate the rhizosphere to release nonexchangeable K from soil, and (3) to take up K at low rhizosphere K concentrations. Genotypes with greatest KUtE have the ability (1) to redistribute K from older to younger tissues to maintain growth and photosynthesis and (2) to reduce vacuolar K concentration, while maintaining an appropriate K concentration in metabolically active subcellular compartments, either by anatomical adaptation or by greater substitution of K with other solutes in the vacuole. Genetic variation in traits related to KUpE and KUtE might be exploited in breeding crop genotypes that require less K fertilizer. This could reduce fertilizer costs, protect the environment, and slow the exhaustion of nonrenewable resources.

show abstract

Morfologia de raízes e cinética de absorção de potássio em genótipos de arroz irrigado

Cited by 8 publications

References 18 publications

Production of Pepper Seedlings With Different Doses of Organic Compounds in Substrate

Production of Pepper Seedlings With Different Doses of Organic Compounds in Substrate

Seed productivity, oil content and accumulation of macronutrients in safflower (Carthamus tinctorius L.) genotypes in subtropical region

Potassium Use Efficiency of Plants

Contact Info

Product

Resources

About