Ano 2019

Vol. 66

No. 3

Agronomic performance of cultivars and advanced selections of strawberry in the South Plateau of Santa Catarina State

Fragaria vs. ananassa Duch.; selection of genotypes; yield; fruit quality

Strawberry cultivation requires the use of cultivars adapted to the temperature and photoperiod conditions of the

production region. The objective of this work was to evaluate cultivars and advanced selections of strawberry on

productive performance and fruit quality, under the conditions of South Plateau of Santa Catarina State. The experiment

was carried out in the municipality of Lages, in the 2016/2017 growing season. The cultivation system used was in the

soil, in beds covered with black polyethylene film. The cultivars Camino Real, Benicia and Pircinque, and the selection

CE 56 obtained the highest yields, above to 30 t ha-1. Benicia, Camino Real and Monterey, in turn, obtained the fruits with

higher average fresh weight, around 24 g fruit-1. In the selections CE 51, CE 56, FRF 57.6, LAM 119.1, FRF 104.1, FRF PA

109.2 and the cultivars Benicia and Monterey the fruits of better quality were achieved, expressed by values of soluble

solids / titratable acidity ratio above to 13. The cultivars Camino Real, Benicia and Pircinque, and the selection CE 56

 

performed as the most adapted to the region of study, among the genotypes evaluated.

159 - 167

Growth and sugarcane cultivars productivity under notillage and reduced tillage system

Saccharum spp.; cane-plant; soil management

This study aims to evaluate the growth and yield of the sugarcane plant cultivars, and their correlation to soil

mechanical penetration resistance in a Dystroferric Red Oxisol submitted to reduced tillage and, no-tillage systems.

Eight sugarcane plant cultivars (RB965902, RB985476, RB966928, RB855156, RB975201, RB975242, RB036066 and

RB855536) were in each soil preparation system, and the trial was conducted in a completely randomized design and

eight treatments and four replications. The trial evaluated: number of tillers per meter, stalks height and diameter, and

stalks yield and sugar content. Additionally, were evaluated the soil mechanical penetration resistance (PR) and soil

moisture. The highest rates of daily elongation, yield of stalks and sugar content were observed under no - tillage, due

to the lower soil mechanical penetration resistance and higher soil moisture. The cultivar RB966928 presented higher

values for growth, yield of stalks and sugar content, while RB855536 and the medium to late maturity cultivars RB975201,

RB975242, RB036066, which had either a lower stalk growth rate or presented lower number at the end of the cycle in both

 

soil tillage.

168 - 177

Increasing the length of EM-9 interstock enhances production efficiency in Imperial Gala apples

Mallus domestica; Marubakaido; rootstock; production; fruit quality

The objective of this study was to evaluate the influence of different lengths of EM-9 interstock, on the production

and fruit characteristics of Imperial Gala apples more than eight years old. This experiment was conducted in a commercial

orchard located in Vacaria-RS, Brazil, situated at an altitude of 955 m , during seasons 2005/06, 2007/08, 2010/11, 2011/12

and 2012/13. The treatments consisted of five lengths of EM-9 interstock (10, 15, 20, 25 and 30 cm) connecting the

Marubakaido rootstock to the Imperial Gala scion. For production efficiency a positive correlation between increased

efficiency and the length of interstock was observed. Likewise a positive correlation was also noted for quality parameters

of the fruit; firmness and classification (Category 1). From this study we conclude that a EM-9 interstock of 30 cm on

Marubakaido rootstock is the most suitable for the vigor control of Imperial Gala apples, it ensures greater production

 

efficiency and firmer fruit.

178 - 183

Row orientation effects on Syrah grapevine performance during winter growing season

Vitis vinifera; vineyard design; double pruning; vigor; wine grape qua

The sunlight and heating effects on leaves and grapes are directly influenced by row orientation in vineyards. Row

orientation studies have not been addressed under double pruning management, a technique used to transfer the wine

grape harvest from wet summer to dry winter season in Brazilian Southeast. Effects of grapevine row orientation

(north/south – NS and east/west – EW) of vertically trellised and shoot positioned Vitis vinifera L. Syrah grafted onto

1103 Paulsen were investigated in the South of Minas Gerais State. The vegetative vigor was increased in NS oriented

vines, probably due to high photosynthesis as suggested by the highest leaf starch accumulation. The leaf and stem

water potential were slight affected by row orientation. NS orientation increased the cluster weight, but cluster number

and yield per vine were not affected by treatments. Berries from NS oriented vines also showed the highest values of

anthocyanins and total phenols. Under NS orientation there was a reduction on tartaric acid and soluble sugar in

berries probably diluted by increased cluster weight. This study showed that vineyard under NS orientation improved

grapevine vigor and promoted better phenolic maturity in wine grapes harvested during the winter season than EW

 

orientation.

184 - 190

Can leaf area in rice be defined by a mathematical model?

Oryza sativa leaf area index non-destructive method linear dimensions

The goal of this study was to define an empirical model to calculate the leaf area in rice from linear leaf measure in

genotypes used by farmers in Brazil. Through the leaf dimensions it is possible to identify the final crop yield from the

LAI. Therefore, the leaves shape is closely related to the production of photoassimilates that will be converted into

grain yield. Field experiments were carried out in four counties of Rio Grande do Sul with twelve-three varieties of rice

in four growing seasons. We measured the length and width of leaves to construct the model. The relationship

between leaf area and linear dimensions was shaped using a linear model for each genotype, and general model

grouping all genotypes. The model accuracy was measure following statistics: Root Mean Square Error, BIAS, modified

index of agreement and coefficient r. The non-destructive method for individual leaves was appropriate for estimating

the leaf area in rice. Moreover, the general equation was estimated and can be used for all modern genotypes of rice in

Brazil.

191 - 199

Phenology and thermal requirements of the atemoya tree (Annona cherimola Mill. X Annona squamosa L.)

BBCH; degree days; agronomic seasons; pruning; cycles

The present study had as the main objective the documentation and characterization of the different phenological

stages, as well as the definition of the thermal requirements, of the atemoya tree for two agronomic seasons. From shoot

development to senescence and beginning of the rest period eight main stages were described (shoot development, leaf

development, shoot/bud growth, inflorescence appearance, flowering, fruit development, fruit maturity and senescence

and the beginning of the rest period). The number of days and the thermal requirements for completing each phenological

stage were different between the two agronomic seasons of the atemoya. The first and second agronomic season

presented a period of 217 and 206 days, with thermal requirements of 2469 and 2302 degree days, respectively.

  • Mendes, Débora S.
  • Pereira, Marlon C. T.
    Universidade Estadual de Montes Claros Departamento de Ciências Agrárias
  • Nietsche, Silvia
    Universidade Estadual de Montes Claros Departamento de Ciências Agrárias
  • Xavier, Helisson R. A.
  • Paixão, Pedro T. M.
  • Fonseca, Matheus P.

200 - 209

Interference of volunteer corn in growth and chlorophyll fl uorescence of bean

Phaseolus vulgaris; photosynthetic pigments; emerging time; competition; solar radiation; soil

Corn kernels or seeds that remain after harvest can germinate and become a troublesome volunteer plant where bean crops are grown. The objective of this study was to evaluate the effect of time of emergence of volunteer corn on growth parameters, photosynthetic pigments and chlorophyll fluorescence in bean plants, competition for soil and light and light resources. The study was conducted in completely randomised experimental design, in 2×2×2+2 factorial scheme with four replications, involving two bean cultivars in competition with volunteer corn, emerging seven days before and simultaneously with beans, besides the partitioning of the competition by soil and light, just light and two controls without competition. We measured the levels of chlorophyll a, b, total and carotenoids, parameters related to chlorophyll fluorescence and bean growth variables. Volunteer corn was more competitive when it emerged seven days before the beans. When competition was established by light resource, there was a reduction in photosynthetic pigments and morphological variables of the bean plants. When competition by soil and light resources occurred, there was a reduction not only in photosynthetic pigments and morphological characteristics, but also in the chlorophyll fluorescence variables. There were significant correlations between the growth variables of the bean plants and chlorophyll fluorescence, which makes it an important analytical tool for quantifying the stress caused by weeds

210 - 219

Reaction of soybean cultivars to Meloidogyne javanica and Meloidogyne incognita

reproduction factor; resistance; root-knot nematode; susceptibility

Nematodes of the genus Meloidogyne are associated with soybean cultivation, unknown the reaction of cultivars.

The objective of this work was to determine the reaction of soybean cultivars to M. javanica and M. incognita.

Twenty-seven soybean cultivars were sown in plastic pots, in a completely randomized experimental design with eight

replicates. Ten days after emergence of the seedlings, in a separate experiment, M. javanica and M. incognita were

inoculated. For M. javanica, cultivars classified as susceptible were BMX Lança IPRO, AMS Tibagi RR, BMX Vanguarda

IPRO, NS 6700 IPRO, BMX Ativa RR, FPS Solimões RR, TEC 6702 IPRO, NS 5909 RR, NS 5445 IPRO, 54i52 RSF

IPRO, M 6410 IPRO and NS 5959 IPRO and BMX Elite IPRO, NA 6211 RR, BMX Valente RR, FPS Júpter RR, FPS Iguaçú

RR, BMX Tornado RR, GMX Cancheiro RR, TMG 7161 IPRO, TMG 7062 IPRO, FPS Solar RR, M 5730 IPRO, DM5958

RSF IPRO, NS 6006 IPRO, SYN 1163 RR and M 5947 IPRO were resistant. Regarding M. incognita, the resistant

cultivars were FPS Iguaçú RR, FPS Solar IPRO, SYN 1163 RR and TMG 7062 IPRO. The cutlivars FPS Júpter RR, SYN

1163 RR e TMG 7062 IPRO were resistant to both nematodes.

220 - 225

Growth and quality of Handroanthus serratifolius seedlings in soils incorporating amendments and inorganic residues

stone meal technique; ash; seedling production; textural class.

Rock powder and boiler ash are residues with a high potential for the fertilization of substrates to produce forestry

seedlings. They are the source of macro and micronutrients, besides having an effect on soil pH. Therefore, this study

aimed to evaluate the effect of the isolated application of rock power, boiler ash, dolomitic limestone and calcium

carbonate on the reaction of soils with a sandy and clayey texture in the Cerrado Piauiense and on the growth and

quality of ipê-amarelo seedlings. For this purpose, the pH values of soil in water and CaCl2 solution and the following

morphophysiological parameters as indicators of the quality of forest seedlings were analyzed: length of the aerial part

(LAP), and root (RL), stem diameter (SD), number of leaves (NL), total chlorophyll (TC), fresh mass of the aerial part

(FMAP), fresh mass of the root (FMR), dry mass of the aerial part (DMAP), of the root (DMR) and total (TRM), and the

DMAP/DMR and LAP/SD ratios and Dickson quality index (DQI). It was found that the rock powder and boiler ash

residues change the pH values in clayey and sandy soils, and promote the growth and quality of ipê-amarelo seedlings.

235 - 242

Effects of trees and nitrogen supply on the soil microbiological attributes on integrated crop-livestock systems

acid phosphatase; agroforestry; arbuscular mycorrhizal fungi; glomalin; microbial biomass; tropical grasses.

The diversification of plants, as an association between trees and the warm-season grasses, supports soil biodiversity

and thus, soil quality. However, based on the prevailing climatic conditions, management techniques employed and

because of the several combinations possible in such associations, variations may be observed in this type of response.

This study aimed at assessing the microbiological attributes of the soil in two systems (full sunlight, FS, vs. a naturally

shaded system composed of Eucalyptus dunnii trees), with two N fertilization levels (zero vs. 300 kg N ha-1year-1) and

five perennial warm-season grasses. Soil and root samples were drawn from a depth of 0 to 20 cm when the growing

period began. The N fertilization increased the mycorrhizal colonization and the acid phosphatase activity, whereas

lowered the soil microbial biomass. A rise in the mycorrhizal colonization and sporulation and C microbial biomass

concentration were observed in the soil cultivated with Axonopus catharinensis. The association with trees favored

the arbuscular mycorrhizal fungal communities, boosting both colonization and sporulation. However, compared with

the FS, the soil microbial biomass and activity of the acid phosphatase enzyme were reduced under the trees. Silvicultural

interventions could be intensified to enhance soil quality.

226 - 234