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Vineyard microclimate and yield under different plastic covers.

Ester Holcman1, Paulo Cesar Sentelhas2, Marco Antônio Fonseca Conceição2

  • 1Agriculture College, Luiz de Queiroz Universidade de Sao Paulo, Piracicaba, Sao Paulo, Brazil. esterholcman@yahoo.com.br.

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|January 1, 2018
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Summary
This summary is machine-generated.

Braided polypropylene film (BPF) enhanced BRS Morena grape yield and plant growth compared to black shading screens (BSS) in São Paulo vineyards. BPF covers improved fruit yield and plant development under vineyard plastic covers.

Keywords:
BRS MorenaBlack shading screenBraided polypropylene filmLeaf wetness durationYield

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Area of Science:

  • Viticulture
  • Agricultural Engineering
  • Horticultural Science

Background:

  • Adverse weather conditions impact grape production in São Paulo, Brazil.
  • Plastic covers are used in vineyards to mitigate weather effects.
  • Limited research exists on different plastic covers for vineyards in this region.

Purpose of the Study:

  • To compare the effects of black shading screen (BSS) and braided polypropylene film (BPF) on BRS Morena vineyard microclimate and yield.
  • To evaluate the influence of these covers on grape quality and plant growth parameters.

Main Methods:

  • Experiments conducted over three growing seasons (2012-2014) on BRS Morena grapevines.
  • Comparison of microclimate variables (solar radiation, net radiation, PAR, air temperature, relative humidity, wind speed) under BSS, BPF, and open conditions (AWS).
  • Assessment of fruit yield components (shoots with bunches, bunch weight, berry diameter, fertile buds) and plant growth (leaf size, growth speed).

Main Results:

  • Black shading screen (BSS) showed higher solar radiation (SR) transmissivity, net radiation (Rn), and photosynthetically active radiation (PAR)/SR ratio.
  • No significant differences in average air temperature (T) or relative humidity (RH) between covered and uncovered areas.
  • Braided polypropylene film (BPF) resulted in significantly higher fruit yield and improved plant growth metrics compared to BSS.

Conclusions:

  • Braided polypropylene film (BPF) offers superior conditions for BRS Morena grape cultivation compared to black shading screen (BSS).
  • BPF positively influences key yield components and plant development, making it a promising option for vineyards in northwestern São Paulo.
  • Plastic covers reduce wind speed but maintain adequate air circulation and temperature/humidity levels within the vineyard canopy.