Relationships Between the Distribution of Relative Canopy Light Intensity and the Peach Yield and Quality

There are considerable differences in chestnut yield and quality across different chestnut-producing regions in China, indicating that environmental factors affect these properties of chestnuts. Furthermore, nut yield and quality differ depending on canopy position. Therefore, this study investigated the relationship between the canopy microclimate, nut yield, and quality. We determined microclimate factors from blossoming to ripening at different positions in the canopy. Nut yield and quality and the number of different branch types were measured at various canopy positions. The light intensity and temperature of the different canopy layers exhibited funnel-form distributions ranging from 0 to 3600 μmol·m2·s−1 and from 32 to 37 °C, respectively. Canopy humidity showed an inverted funnel-shaped distribution ranging from 26% to 40%. Nut yield and quality in the top and outer canopies were higher than in the bottom and inner canopies. Branches in the top-middle and peripheral parts of the canopy also produced higher yields, especially strong branches that bore more nuts. Nut yield and quality had positive correlations with light intensity (r = 0.735) and temperature (r = 0.709), whereas they were inversely associated with humidity (r = −0.584). The nut yield was more than 200 gm−3 when the light intensity was above 1500 μmol·m2·s−1, the temperature was above 34.4 °C, and the humidity was below 27.5%.

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Influence of Light Intensity on the Yield and Quality of Houttuynia cordata

Plant Production Science ◽

10.1626/pps.18.522 ◽

2015 ◽

Vol 18 (4) ◽

pp. 522-528 ◽

Cited By ~ 1

Author(s):

Aimin Li ◽

Shenghua Li ◽

Xianjin Wu ◽

Hongmei Lu ◽

Min Huang ◽

...

Keyword(s):

Light Intensity ◽

Houttuynia Cordata ◽

Yield And Quality

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Effects of the modification of light intensity by color shade nets on yield and quality of tomato fruits

Scientia Horticulturae ◽

10.1016/j.scienta.2012.03.009 ◽

2012 ◽

Vol 139 ◽

pp. 90-95 ◽

Cited By ~ 46

Author(s):

Zoran S. Ilić ◽

Lidija Milenković ◽

Ljiljana Stanojević ◽

Dragan Cvetković ◽

Elazar Fallik

Keyword(s):

Light Intensity ◽

Tomato Fruits ◽

Yield And Quality

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Yield and quality of inflorescences of 'Golden Torch' heliconia in different shaded environments

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v20n2p128-132 ◽

2016 ◽

Vol 20 (2) ◽

pp. 128-132

Author(s):

Rafaela R. de Souza ◽

Márkilla Z. Beckmann-Cavalcante ◽

Alcilane A. Silva ◽

Everaldo M. da Silva ◽

Leonardo P. da S. Brito ◽

...

Keyword(s):

Light Intensity ◽

Plant Species ◽

Environmental Conditions ◽

Crop Growth ◽

Light Energy ◽

Growth And Yield ◽

Yield And Quality ◽

Crop Environment

ABSTRACT Light is one of the factors that most affect crop growth and yield. However, the control of light intensity is difficult, because, under certain environmental conditions, light energy may exceed or limit the capacity of plants to use it. In this sense, the productive behavior of plant species in shaded environments needs to be known. This study aimed to evaluate the effect of different shaded environments with black shade nets [0 (full sun), 35 and 50%, and overlap 35 + 50% shading nets] on flowering, yield and quality of inflorescences of Heliconia psittacorum (cv. 'Golden Torch'). The shaded environments caused a reduction in the number of days for inflorescence emergence and in the cycle of H. psittacorum (cv. 'Golden Torch'). The yield and quality of inflorescences of plants grown under full-sun conditions (0% shading) were impaired. The results indicate that, for a better management of the crop environment, aiming yield and quality of inflorescences of H. psittacorum (cv. 'Golden Torch'), the use of black shade nets with 50% shading is recommended.

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