Polymer and photo-selective covers on plant and fruit development: A review

被引:4
作者
Pandey, Gareema [1 ]
Parks, Sophie [2 ]
Thomas, Richard G. [1 ]
机构
[1] Western Sydney Univ, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia
[2] Cent Coast Primary Ind Ctr, Dept Primary Ind, Gosford, NSW, Australia
关键词
COLORED SHADE-NETS; LIGHT-QUALITY; QUANTUM DOTS; GAS-EXCHANGE; SWEET CHERRY; HAIL NETS; ENVIRONMENTAL-FACTORS; GREENHOUSE ROOF; SOLAR-RADIATION; CLIMATE-CHANGE;
D O I
10.1002/agj2.21442
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Growers have increasingly adopted protected cropping in tunnels or greenhouses to ensure sustainability and continuous crop productivity against a backdrop of climate change. The predominant types of covers used in controlled-environment agriculture are polymer-based shade nets or structures covered with polymer sheets. These have three main functions: (1) physical protection from birds, hail, and excessive radiation; (2) modification of the environment by controlling humidity, shade, and temperature; and (3) increasing the proportion of diffuse light. In order to address concerns regarding the amounts of useful light potentially blocked by these covers, researchers and growers have suggested several innovative solutions that involve altering the light received by plants. This includes supplementation of artificial illumination, filtering solar radiation with colored films, or altering the incident spectrum with spectral-shifting covers containing light-emitting fluorescent compounds embedded within a polymer matrix. In principle, any of these methods have the potential to selectively modify the spectrum of incident light and subsequently induce plant physiological responses, resulting in increased crop yield, improved fruit quality, and reduced susceptibility to pests and diseases. This review focuses on the benefits offered by passive covers in terms of their variable shading and light transmittance properties and their effects on vegetative growth and fruit development in various crops. It is anticipated that through a better understanding of photo-selective covers in protected cropping, primary producers will be better equipped to make informed decisions regarding their deployment and thereby achieve better yields and more nutritious produce from their crops. Experimental covers with photovoltaics limit horticultural production.Light-shifting covers with perylene dyes or nanocrystals require further development.Photo-selective covers suit high light intensities and light-shifting ones suit low light.Photo-selective covers promote yield but block UV, limiting secondary metabolites.Supplementary blue light-emitting diodes may increase flavonoids under photo-selective films.
引用
收藏
页码:3074 / 3091
页数:18
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